从零手搓一个类Spring框架，彻底搞懂Spring核心原理

从零手搓一个类Spring框架，彻底搞懂Spring核心原理

作者：JarryLi
适合读者：Java工程师以及对设计模式和框架原理感兴趣的同学。如果你想学习和运用设计模式，熟悉Spring框架是最佳的途径之一。

前言

还记得很多年前刚接触Spring的时候，我觉得很神奇：通过xml配置就可以自动注入对象，甚至一个@Autowired注解就能搞定？AOP 还能在不侵入业务代码的情况下统一加日志和事务？那时主流还是 EJB 体系，使用原生Servlet、JSP以及Struts框架。面对 IoC、DI 这些看似"魔法"的能力，不免想一探究竟：它们到底是怎么实现的？
从那时起，开始学习Spring源码。真正看进去才发现，这些并不神奇，而是大量工程化设计的结果：层层抽象、接口解耦、经典设计模式的复用。源码规模不小，很难一口气看完，只能带着问题一点点学习。
纸上得来终觉浅，绝知此事要躬行。于是参照Spring框架写了一个简化版的SpringWind框架，用最简洁的代码实现 Spring 的核心功能，让每个想深入理解框架原理的开发者都能看懂。
在这个过程中，不仅搞懂了IoC、DI、AOP这些核心概念，以及Bean生命周期、DispatcherServlet控制器与ApplicationContext容器体系，还深刻理解了为什么Spring要这样设计。现在，我把这些实践经验和心得分享出来，希望能帮助你快速掌握Spring的核心原理。
代码仓库： https://github.com/microwind/design-patterns/tree/main/practice-projects/springwind
目录

• 关于 SpringWind 框架
  
• Spring的设计理念
  
• Spring的核心特性
  
• 深入理解Spring框架
  
• 参照Spring框架设计Springwind的架构
  
• SpringWind 与 Spring MVC 的对比
  
• Springwind框架有什么用
  
• Springwind的项目结构
  
• Springwind使用实践
  
• 快速开始
  
• Springwind改进点
  

关于 SpringWind 框架

SpringWind 是一个教学性质的轻量级 Java Web 框架，旨在帮助开发者深入理解 Spring 框架的核心原理。通过从零开始实现 Spring 的核心机制（IoC、DI、AOP、三级缓存、MVC等），让框架不再是"黑盒子"，而是可以完全理解的"白盒子"。
框架定位

SpringWind 不是为了替代 Spring Framework，而是作为：

• 学习工具：是理解 Spring 核心原理的最佳实践
  
• 教学框架：通过由浅入深的方式，让你逐渐理解Spring框架
  
• 快速原型：对于一些小型项目，那么Springwind更加轻量简便
  
• 探索平台：可以验证一些新架构思想与理念，不断创新
  

核心特性

SpringWind 实现了 Spring Framework 的以下核心功能：
特性说明对应 Spring 功能IoC 容器自动扫描、注册和管理 Bean 的生命周期ApplicationContext依赖注入通过 @Autowired 实现自动装配Dependency Injection组件注解@Component、@Service、@Controller、@RepositoryStereotype AnnotationsMVC 模式模拟 Spring MVC 的请求处理机制Spring MVC请求映射@RequestMapping 实现 URL 到方法的映射Request Mapping参数绑定@PathVariable、@RequestParam、@RequestBodyParameter BindingAOP 支持基于 JDK/CGLIB 的动态代理实现切面编程Spring AOPBeanPostProcessorBean 的前置和后置处理，支持生命周期干预BeanPostProcessorSmartInstantiationAwareBeanPostProcessor支持在 Bean 实例化早期创建代理，解决循环依赖SmartInstantiationAwareBeanPostProcessor三级缓存优雅解决循环依赖问题Circular Dependency ResolutionJDBC 模板简化数据库操作的模板类JdbcTemplateJSON 响应自动序列化对象为 JSON@ResponseBody与 Spring Framework 的关系

SpringWind 参考了 Spring Framework 的设计思想，但做了大量简化：
相同点：

• 核心设计理念（IoC、DI、AOP）
  
• 注解驱动开发
  
• 分层架构（Controller-Service-Dao）
  
• 三级缓存解决循环依赖
  
• 模板方法封装样板代码
  

不同点：

• 代码规模：SpringWind 代码约 4000 行，Spring Framework 超过 50 万行
  
• 功能范围：SpringWind 聚焦核心功能，Spring 提供全面的企业级特性
  
• 复杂度：SpringWind 去除了大量抽象层次，更易理解
  
• 生产就绪：Spring 经过大规模验证，SpringWind 主要用于学习
  

技术栈

1. 核心技术：
2. ├── Java 17+<bean id="userService" >
3.     <property name="userDao" ref="userDao"/>
4. </bean>
5. <bean id="userDao" /><bean id="userService" >
6.     <property name="userDao" ref="userDao"/>
7. </bean>
8. <bean id="userDao" /><bean id="userService" >
9.     <property name="userDao" ref="userDao"/>
10. </bean>
11. <bean id="userDao" /><bean id="userService" >
12.     <property name="userDao" ref="userDao"/>
13. </bean>
14. <bean id="userDao" /><bean id="userService" >
15.     <property name="userDao" ref="userDao"/>
16. </bean>
17. <bean id="userDao" /># 现代 Java 特性
18. ├── Jakarta Servlet API 6.1<bean id="userService" >
19.     <property name="userDao" ref="userDao"/>
20. </bean>
21. <bean id="userDao" /> # Web 容器标准
22. ├── CGLIB 3.3.0<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /> # 字节码增强（AOP）
35. ├── SLF4J + Logback<bean id="userService" >
36.     <property name="userDao" ref="userDao"/>
37. </bean>
38. <bean id="userDao" /><bean id="userService" >
39.     <property name="userDao" ref="userDao"/>
40. </bean>
41. <bean id="userDao" /><bean id="userService" >
42.     <property name="userDao" ref="userDao"/>
43. </bean>
44. <bean id="userDao" /> # 日志框架
45. └── Jackson 2.18.2<bean id="userService" >
46.     <property name="userDao" ref="userDao"/>
47. </bean>
48. <bean id="userDao" /><bean id="userService" >
49.     <property name="userDao" ref="userDao"/>
50. </bean>
51. <bean id="userDao" /><bean id="userService" >
52.     <property name="userDao" ref="userDao"/>
53. </bean>
54. <bean id="userDao" />  # JSON 序列化
56. 构建工具：
57. └── Maven 3.6+
59. 运行环境：
60. ├── Embedded Tomcat 11<bean id="userService" >
61.     <property name="userDao" ref="userDao"/>
62. </bean>
63. <bean id="userDao" /><bean id="userService" >
64.     <property name="userDao" ref="userDao"/>
65. </bean>
66. <bean id="userDao" /> # 嵌入式 Web 服务器
67. └── H2 / MySQL<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" /><bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /> # 数据库（可选）

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SpringWind 与 Spring MVC 注解对照表

为了降低学习成本，SpringWind 的注解与 Spring MVC 保持一致：
SpringWind 注解Spring MVC 注解作用示例@Component@Component标记通用组件@Component@Service@Service标记服务层组件@Service@Controller@Controller标记控制器组件@Controller@Repository@Repository标记数据访问层组件@Repository@Autowired@Autowired自动注入依赖@Autowired private UserDao dao;@RequestMapping@RequestMapping映射 HTTP 请求@RequestMapping("/user")@PathVariable@PathVariable绑定路径变量@PathVariable("id") Long id@RequestParam@RequestParam绑定请求参数@RequestParam("name") String name@RequestBody@RequestBody绑定请求体（JSON）@RequestBody User user@ResponseBody@ResponseBody返回 JSON 响应@ResponseBody@Aspect@Aspect标记切面类@Aspect@Before@Before前置通知@Before("com.example.*")@After@After后置通知@After("com.example.*")@Around@Around环绕通知@Around("com.example.*")使用示例：

1. // 定义 Controller
2. @Controller
3. @RequestMapping("/user")
4. public class UserController {
5. <bean id="userService" >
6.     <property name="userDao" ref="userDao"/>
7. </bean>
8. <bean id="userDao" />@Autowired
9. <bean id="userService" >
10.     <property name="userDao" ref="userDao"/>
11. </bean>
12. <bean id="userDao" />private UserService userService;  // 自动注入
14. <bean id="userService" >
15.     <property name="userDao" ref="userDao"/>
16. </bean>
17. <bean id="userDao" />@RequestMapping("/get")
18. <bean id="userService" >
19.     <property name="userDao" ref="userDao"/>
20. </bean>
21. <bean id="userDao" />@ResponseBody
22. <bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />public User getUser(@RequestParam("id") Long id) {
26. <bean id="userService" >
27.     <property name="userDao" ref="userDao"/>
28. </bean>
29. <bean id="userDao" /><bean id="userService" >
30.     <property name="userDao" ref="userDao"/>
31. </bean>
32. <bean id="userDao" />return userService.getUserById(id);
33. <bean id="userService" >
34.     <property name="userDao" ref="userDao"/>
35. </bean>
36. <bean id="userDao" />}
38. <bean id="userService" >
39.     <property name="userDao" ref="userDao"/>
40. </bean>
41. <bean id="userDao" />@RequestMapping("/detail/{id}")
42. <bean id="userService" >
43.     <property name="userDao" ref="userDao"/>
44. </bean>
45. <bean id="userDao" />@ResponseBody
46. <bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />public User getUserDetail(@PathVariable("id") Long id) {
50. <bean id="userService" >
51.     <property name="userDao" ref="userDao"/>
52. </bean>
53. <bean id="userDao" /><bean id="userService" >
54.     <property name="userDao" ref="userDao"/>
55. </bean>
56. <bean id="userDao" />return userService.getUserById(id);
57. <bean id="userService" >
58.     <property name="userDao" ref="userDao"/>
59. </bean>
60. <bean id="userDao" />}
62. <bean id="userService" >
63.     <property name="userDao" ref="userDao"/>
64. </bean>
65. <bean id="userDao" />@RequestMapping("/create")
66. <bean id="userService" >
67.     <property name="userDao" ref="userDao"/>
68. </bean>
69. <bean id="userDao" />@ResponseBody
70. <bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />public User createUser(@RequestBody User user) {
74. <bean id="userService" >
75.     <property name="userDao" ref="userDao"/>
76. </bean>
77. <bean id="userDao" /><bean id="userService" >
78.     <property name="userDao" ref="userDao"/>
79. </bean>
80. <bean id="userDao" />return userService.createUser(user);
81. <bean id="userService" >
82.     <property name="userDao" ref="userDao"/>
83. </bean>
84. <bean id="userDao" />}
85. }

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如果你熟悉 Spring MVC，就能零学习成本理解 SpringWind！你理解了Springwind也就明白了Spring。
学习路径建议

第一步：快速体验（10分钟）

• 运行示例项目，看看效果
  
• 访问几个 API 接口，理解请求流程
  

第二步：理解核心原理（1-2小时）

• 阅读本文档的"Spring的设计理念"和"Spring的核心特性"
  
• 打断点调试，观察 Bean 的创建和依赖注入过程
  
• 理解三级缓存如何解决循环依赖
  

第三步：深入源码（3-5小时）

• 阅读 SpringWindApplicationContext.java（IoC 容器核心）
  
• 阅读 AspectProcessor.java（AOP 代理创建）
  
• 阅读 DispatcherServlet.java（MVC 请求分发）
  
• 阅读 JdbcTemplate.java（JDBC 模板方法）
  

第四步：动手实践（1-2天）

• 基于 SpringWind 写一个小项目
  
• 尝试添加新功能（如事务支持）
  
• 对比 Spring Framework 源码，理解设计差异
  

第五步：给 Spring 贡献代码（进阶）

• 理解 Spring 的设计思想后，可以参与 Spring 社区
  
• 提交 Bug 修复或新功能的 Pull Request
  

Spring的设计理念

在开始造轮子之前，我们得先理解Spring为什么要这样设计。很多人觉得Spring框架复杂，但其实它的核心理念非常简单。
1. 控制反转（IoC）- 别再自己new对象了

传统做法的痛点：

1. // 传统方式：自己管理对象
2. public class UserService {
3. <bean id="userService" >
4.     <property name="userDao" ref="userDao"/>
5. </bean>
6. <bean id="userDao" />private UserDao userDao = new UserDaoImpl();  // 硬编码依赖
7. <bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />private EmailService emailService = new EmailServiceImpl();   // 硬编码依赖
12. <bean id="userService" >
13.     <property name="userDao" ref="userDao"/>
14. </bean>
15. <bean id="userDao" />public void registerUser(User user) {
16. <bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />userDao.save(user);
23. <bean id="userService" >
24.     <property name="userDao" ref="userDao"/>
25. </bean>
26. <bean id="userDao" /><bean id="userService" >
27.     <property name="userDao" ref="userDao"/>
28. </bean>
29. <bean id="userDao" />emailService.sendWelcomeEmail(user);
30. <bean id="userService" >
31.     <property name="userDao" ref="userDao"/>
32. </bean>
33. <bean id="userDao" />}
34. }

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这样写有什么问题？
其实这样写本身从理解来讲最好理解，但不便于扩展。项目一大，后续维护就变得麻烦。

• 耦合度高：UserService强依赖具体的实现类
  
• 难以测试：无法替换成Mock对象做单元测试
  
• 配置混乱：数据库连接、邮件配置都硬编码在代码里
  

Spring的解决方案：

1. // Spring方式：依赖注入
2. @Service
3. public class UserService {
4. <bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />@Autowired
8. <bean id="userService" >
9.     <property name="userDao" ref="userDao"/>
10. </bean>
11. <bean id="userDao" />private UserDao userDao;  // 由容器注入
12. <bean id="userService" >
13.     <property name="userDao" ref="userDao"/>
14. </bean>
15. <bean id="userDao" />@Autowired
16. <bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />private EmailService emailService;
21. <bean id="userService" >
22.     <property name="userDao" ref="userDao"/>
23. </bean>
24. <bean id="userDao" />public void registerUser(User user) {
25. <bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />userDao.save(user);
32. <bean id="userService" >
33.     <property name="userDao" ref="userDao"/>
34. </bean>
35. <bean id="userDao" /><bean id="userService" >
36.     <property name="userDao" ref="userDao"/>
37. </bean>
38. <bean id="userDao" />emailService.sendWelcomeEmail(user);
39. <bean id="userService" >
40.     <property name="userDao" ref="userDao"/>
41. </bean>
42. <bean id="userDao" />}
43. }

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现在，对象的创建和管理交给了IoC容器，业务代码只需要声明"我需要什么"，而不用关心"怎么创建"。这就是控制反转的核心思想。
2. 面向切面编程（AOP）- 横切关注点分离

假设你要给所有Service方法加日志，传统做法是这样：

1. public class UserService {
2. <bean id="userService" >
3.     <property name="userDao" ref="userDao"/>
4. </bean>
5. <bean id="userDao" />public void registerUser(User user) {
6. <bean id="userService" >
7.     <property name="userDao" ref="userDao"/>
8. </bean>
9. <bean id="userDao" /><bean id="userService" >
10.     <property name="userDao" ref="userDao"/>
11. </bean>
12. <bean id="userDao" />System.out.println("开始执行registerUser");  // 日志代码
13. <bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />long start = System.currentTimeMillis();<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />  // 性能监控代码
24. <bean id="userService" >
25.     <property name="userDao" ref="userDao"/>
26. </bean>
27. <bean id="userDao" /><bean id="userService" >
28.     <property name="userDao" ref="userDao"/>
29. </bean>
30. <bean id="userDao" />userDao.save(user);  // 真正的业务逻辑
32. <bean id="userService" >
33.     <property name="userDao" ref="userDao"/>
34. </bean>
35. <bean id="userDao" /><bean id="userService" >
36.     <property name="userDao" ref="userDao"/>
37. </bean>
38. <bean id="userDao" />long end = System.currentTimeMillis();
39. <bean id="userService" >
40.     <property name="userDao" ref="userDao"/>
41. </bean>
42. <bean id="userDao" /><bean id="userService" >
43.     <property name="userDao" ref="userDao"/>
44. </bean>
45. <bean id="userDao" />System.out.println("执行完成，耗时: " + (end - start) + "ms");
46. <bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />}
50. }

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业务代码和日志、监控代码混在一起，非常臃肿。而且如果有100个方法，就得重复100遍这些代码。
AOP的解决方案：

1. @Aspect
2. public class LoggingAspect {
3. <bean id="userService" >
4.     <property name="userDao" ref="userDao"/>
5. </bean>
6. <bean id="userDao" />@Before("com.example.service.*.*")
7. <bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />public void logBefore(Method method) {
11. <bean id="userService" >
12.     <property name="userDao" ref="userDao"/>
13. </bean>
14. <bean id="userDao" /><bean id="userService" >
15.     <property name="userDao" ref="userDao"/>
16. </bean>
17. <bean id="userDao" />System.out.println("开始执行: " + method.getName());
18. <bean id="userService" >
19.     <property name="userDao" ref="userDao"/>
20. </bean>
21. <bean id="userDao" />}
23. <bean id="userService" >
24.     <property name="userDao" ref="userDao"/>
25. </bean>
26. <bean id="userDao" />@After("com.example.service.*.*")
27. <bean id="userService" >
28.     <property name="userDao" ref="userDao"/>
29. </bean>
30. <bean id="userDao" />public void logAfter(Method method) {
31. <bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />System.out.println("执行完成: " + method.getName());
38. <bean id="userService" >
39.     <property name="userDao" ref="userDao"/>
40. </bean>
41. <bean id="userDao" />}
42. }
44. // 业务代码保持纯净
45. @Service
46. public class UserService {
47. <bean id="userService" >
48.     <property name="userDao" ref="userDao"/>
49. </bean>
50. <bean id="userDao" />public void registerUser(User user) {
51. <bean id="userService" >
52.     <property name="userDao" ref="userDao"/>
53. </bean>
54. <bean id="userDao" /><bean id="userService" >
55.     <property name="userDao" ref="userDao"/>
56. </bean>
57. <bean id="userDao" />userDao.save(user);  // 只关注业务逻辑
58. <bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" />}
62. }

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日志、事务、权限校验这些横切关注点被抽离出来，业务代码变得清爽多了。
3. 约定优于配置 - 少写XML，多用注解

早期的Spring需要写大量XML配置：

1. <bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />

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现在只需要：

1. @Servicepublic class UserService {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Autowired<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private UserDao userDao;}

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一个注解就搞定了。这就是约定优于配置的威力。
4. 模板方法模式 - 封装样板代码

JDBC操作有大量的样板代码：

1. // 传统JDBC：50多行代码Connection conn = null;PreparedStatement stmt = null;ResultSet rs = null;try {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />conn = dataSource.getConnection();<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />stmt = conn.prepareStatement("SELECT * FROM users WHERE id = ?");<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />stmt.setLong(1, userId);<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />rs = stmt.executeQuery();<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />if (rs.next()) {<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />return new User(rs);<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />}} catch (SQLException e) {<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />throw new RuntimeException(e);} finally {<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />if (rs != null) try { rs.close(); } catch (SQLException e) {}<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />if (stmt != null) try { stmt.close(); } catch (SQLException e) {}<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />if (conn != null) try { conn.close(); } catch (SQLException e) {}}

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Spring JdbcTemplate：

1. // 简洁的JdbcTemplate：2行代码User user = jdbcTemplate.queryForObject(<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />"SELECT * FROM users WHERE id = ?",<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />(rs, rowNum) -> new User(rs),<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />userId);

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获取连接、关闭资源这些固定步骤被封装了，你只需要专注于SQL和结果映射。
Spring的核心特性

在理解了Spring的设计理念后，我们来看看它的核心特性是如何实现的。
IoC容器 - 对象的大管家

IoC容器就像一个对象工厂，负责：

• 扫描组件：找到所有带@Component、@Service等注解的类
  
• 注册Bean定义：把类的元信息存起来
  
• 实例化Bean：通过反射创建对象
  
• 依赖注入：把依赖的对象注入进去
  
• 生命周期管理：管理Bean的创建和销毁
  

Bean的生命周期：
---title: Bean的生命周期（完整流程）---graph LR<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />A[扫描组件] --> B[注册BeanDefinition]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />B --> C[实例化Bean
调用构造器]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />C --> D["放入三级缓存
ObjectFactory
关键！"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />D --> E["依赖注入
@Autowired字段
可能触发循环依赖"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />E --> F["前置处理器
postProcessBefore
Initialization"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />F --> G["初始化方法
@PostConstruct"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />G --> H["后置处理器
postProcessAfter
Initialization
AOP代理创建"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />H --> I["放入一级缓存
清理二三级缓存"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />I --> J[Bean就绪
可被使用]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />J --> K["销毁
@PreDestroy"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style A fill:#e1f5fe,stroke:#01579b,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style B fill:#fff3e0,stroke:#f57c00,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style C fill:#f1f8e9,stroke:#7cb342,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style D fill:#fff8e1,stroke:#ffb300,stroke-width:3px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style E fill:#fce4ec,stroke:#c2185b,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style F fill:#f3e5f5,stroke:#7b1fa2,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style G fill:#e8f5e8,stroke:#388e3c,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style H fill:#ffe0b2,stroke:#e65100,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style I fill:#c8e6c9,stroke:#2e7d32,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style J fill:#a5d6a7,stroke:#00695c,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style K fill:#FFE4E1,stroke:#B20E7E,stroke-width:2px关键步骤说明：

• 步骤4（三级缓存）：这是解决循环依赖的关键，放入的是ObjectFactory而非Bean本身
  
• 步骤5（依赖注入）：如果依赖的Bean正在创建，会从三级缓存获取早期引用，触发循环依赖解决机制
  
• 步骤8（后置处理器）：AOP代理通常在此创建，但如果在步骤4的getEarlyBeanReference中已创建，则跳过
  

在SpringWind中，我们用一个核心类SpringWindApplicationContext来实现这些功能：

1. public class SpringWindApplicationContext {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// 一级缓存：完整初始化的Bean对象<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private Map singletonObjects = new ConcurrentHashMap();<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />// 二级缓存：早期Bean引用（用于解决循环依赖）<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />private Map earlySingletonObjects = new ConcurrentHashMap();<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />// 三级缓存：ObjectFactory工厂（用于延迟生成早期引用，支持AOP）<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />private Map clazz = bean.getClass();<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />// 扫描所有字段<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />for (Field field : clazz.getDeclaredFields()) {<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />if (!field.isAnnotationPresent(Autowired.class)) {<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />continue;<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />}<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />// 根据类型从容器中查找Bean<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />Object dependency = getBean(field.getType());<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />if (dependency == null) {<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" /><bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />throw new BeanNotFoundException("找不到依赖: " + field.getType());<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" /><bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" />}<bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /><bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />// 通过反射设置字段值<bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" /><bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" />field.setAccessible(true);<bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" /><bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" />field.set(bean, dependency);<bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" />}}

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流程很简单：

• 找到所有带@Autowired的字段
  
• 根据字段类型从容器中查找对应的Bean
  
• 通过反射把Bean注入进去
  

AOP - 动态代理的实现

AOP的核心是动态代理。SpringWind支持两种代理方式：
1. JDK动态代理（基于接口）

1. // 如果目标类实现了接口，目标类实现的接口数量大于0if (interfaces.length > 0) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// 使用JDK动态代理创建代理对象<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />return Proxy.newProxyInstance(<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />// 指定类加载器，用于加载动态生成的代理类<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />classLoader,<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />// 代理类需要实现的接口数组，代理对象需要实现接口的所有方法<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />interfaces,<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />// 创建调用处理器，将目标对象和切面列表传入<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />// AopInvocationHandler负责处理方法调用时的切面逻辑<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />new AopInvocationHandler(target, aspects)<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />);}

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2. CGLIB代理（基于继承）

1. // 创建A的过程（对应代码SpringWindApplicationContext.java）
2. 1. getBean("beanA") 被调用
3. 2. 检查一级缓存singletonObjects → 未找到
4. 3. 检查是否正在创建 → 不在，继续创建流程
5. 4. 标记A正在创建：singletonsCurrentlyInCreation.add("beanA")
6. 5. 实例化A：调用构造器，得到原始对象（此时尚未注入依赖）
8. 6. **关键步骤**：将ObjectFactory放入三级缓存
9.    singletonFactories.put("beanA", () -> getEarlyBeanReference("beanA", rawBeanA))
10.    // 注意：此时放入的是工厂对象，不是Bean本身！
12. 7. 开始为A注入依赖：doDependencyInjection(beanA)
13. 8. 发现A依赖B，调用getBean("beanB")
15.    // 创建B的过程（嵌套在A的创建过程中）
16.    9. 检查一级缓存 → 未找到B
17.    10. 标记B正在创建：singletonsCurrentlyInCreation.add("beanB")
18.    11. 实例化B：得到原始对象
19.    12. 将ObjectFactory放入三级缓存：
20.        singletonFactories.put("beanB", () -> getEarlyBeanReference("beanB", rawBeanB))
21.    13. 开始为B注入依赖：发现B依赖A，调用getBean("beanA")
23.       // 循环依赖检测与解决（关键！）
24.       14. 检查一级缓存 → 未找到A（因为A还没完成初始化）
25.       15. 发现A在正在创建集合中：singletonsCurrentlyInCreation.contains("beanA") = true
26.       16. 检查二级缓存earlySingletonObjects → 未找到
27.       17. 检查三级缓存singletonFactories → 找到A的ObjectFactory ✓
28.       18. **调用ObjectFactory.getObject()**
29.           → 内部调用getEarlyBeanReference("beanA", rawBeanA)
30.           → 如果A需要AOP代理，SmartInstantiationAwareBeanPostProcessor会在此创建代理
31.           → 返回A的早期引用（可能是原始对象，也可能是代理对象）
32.       19. 将A的早期引用放入二级缓存：earlySingletonObjects.put("beanA", earlyA)
33.       20. 从三级缓存移除：singletonFactories.remove("beanA")
34.       21. 返回A的早期引用给B ✓
36.    22. B完成依赖注入（注入了A的早期引用）
37.    23. B执行前置处理器：applyBeanPostProcessorsBeforeInitialization
38.    24. B执行@PostConstruct初始化方法
39.    25. B执行后置处理器：applyBeanPostProcessorsAfterInitialization（AOP代理可能在此创建）
40.    26. B完成创建，放入一级缓存：singletonObjects.put("beanB", beanB)
41.    27. 清理B的二、三级缓存
42.    28. 从正在创建集合移除：singletonsCurrentlyInCreation.remove("beanB")
44. 29. getBean("beanB") 返回完整的B → A成功注入B
45. 30. A完成依赖注入
46. 31. A执行前置处理器
47. 32. A执行@PostConstruct初始化方法
48. 33. A执行后置处理器（如果A之前已在getEarlyBeanReference中创建了代理，这里会跳过）
49. 34. A完成创建，放入一级缓存：singletonObjects.put("beanA", beanA)
50. 35. 清理A的二、三级缓存
51. 36. 从正在创建集合移除：singletonsCurrentlyInCreation.remove("beanA")
52. 37. 完成！A和B都成功创建，循环依赖已解决

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代理的工作流程：
---title: AOP方法调用流程---flowchart LR<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />A["客户端调用方法"] --> B["代理对象拦截"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />B --> C["执行@Before通知
（前置增强）"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />C --> D["调用目标方法
（真正的业务逻辑）"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />D --> E["执行@After通知
（后置增强）"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />E --> F["返回结果"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" /><bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />%% 样式定义<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style A fill:#e1f5fe,stroke:#01579b,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style B fill:#fff3e0,stroke:#f57c00,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style C fill:#f1f8e9,stroke:#7cb342,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style D fill:#fff8e1,stroke:#ffb300,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style E fill:#fce4ec,stroke:#c2185b,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style F fill:#e8f5e8,stroke:#388e3c,stroke-width:2pxWeb MVC - 前端控制器模式

SpringWind的Web MVC实现了经典的前端控制器模式：

1. @WebServlet("/*")public class DispatcherServlet extends HttpServlet {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />protected void service(HttpServletRequest req, HttpServletResponse resp) {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />// 1. 获取请求路径<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />String uri = req.getRequestURI();<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />// 2. 查找处理器<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />HandlerMethod handler = getHandler(uri);<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />// 3. 解析参数<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />Object[] args = resolveArguments(handler, req, resp);<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />// 4. 调用Controller方法<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />Object result = handler.invoke(args);<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />// 5. 处理响应<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />handleResult(result, resp);<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />}}

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请求处理流程：
graph LR<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />A[HTTP请求] --> B[DispatcherServlet]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />B --> C[URL映射]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />C --> D[参数解析]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />D --> E[调用Controller]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />E --> F{返回类型判断}<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />F -->|返回View名称| G[视图解析]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />F -->|返回数据| H[消息转换]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />G --> I[视图渲染]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />H --> I<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />I --> J[HTTP响应]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" /><bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style A fill:#90EE90,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style B fill:#ADD8E6,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style C fill:#FFB6C1,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style D fill:#DDA0DD,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style E fill:#FFD700,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style F fill:#F0E68C,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style G fill:#87CEEB,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style H fill:#98FB98,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style I fill:#FFA07A,stroke:#333,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style J fill:#90EE90,stroke:#333,stroke-width:2pxJDBC模板 - 样板代码的终结者

JdbcTemplate只是把基础JDBC操作的步骤封装起来，实现起来非常简单，没有ORM框架那么复杂：

1. public  T queryForObject(String sql, RowMapper mapper, Object... args) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />Connection conn = null;<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />PreparedStatement stmt = null;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />ResultSet rs = null;<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />try {<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />conn = getConnection();<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />// 1. 获取连接<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />stmt = prepareStatement(sql);  // 2. 创建语句<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />setParameters(stmt, args);<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /> // 3. 设置参数<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />rs = stmt.executeQuery();<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />  // 4. 执行查询<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" /><bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" />return mapper.mapRow(rs, 0);   // 5. 映射结果（你只需要关心这一步）<bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />} catch (SQLException e) {<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />throw new RuntimeException(e);<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />} finally {<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />closeResources(rs, stmt, conn);  // 6. 关闭资源<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />}}

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你只需要提供SQL和结果映射逻辑，其他的都由框架处理。
深入理解Spring框架

为什么要用注解？

注解本质上是元数据，用来描述代码的特性。Java通过反射API可以在运行时读取这些注解：

1. // 扫描类上的注解Class clazz = Class.forName("com.example.UserService");if (clazz.isAnnotationPresent(Service.class)) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// 这是一个Service，注册为Bean}// 扫描字段上的注解for (Field field : clazz.getDeclaredFields()) {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />if (field.isAnnotationPresent(Autowired.class)) {<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />// 这个字段需要依赖注入<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />}}

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注解相比XML配置的优势：

• 就近原则：配置和代码在一起，更直观
  
• 类型安全：编译期检查，避免拼写错误
  
• 重构友好：IDE可以自动重构
  

反射 - Spring的基石

Spring大量使用反射来实现框架功能：

1. // 如果目标类实现了接口，目标类实现的接口数量大于0
2. if (interfaces.length > 0) {
3.     // 使用JDK动态代理创建代理对象
4.     return Proxy.newProxyInstance(
5.         // 指定类加载器，用于加载动态生成的代理类
6.         classLoader,
7.         // 代理类需要实现的接口数组，代理对象需要实现接口的所有方法
8.         interfaces,
9.         // 创建调用处理器，将目标对象和切面列表传入
10.         // AopInvocationHandler负责处理方法调用时的切面逻辑
11.         new AopInvocationHandler(target, aspects)
12.     );
13. }

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反射的性能确实比直接调用慢，但Spring通过缓存来优化：

1. // 构造器缓存private Map> constructorCache = new ConcurrentHashMap();public Object createBean(Class clazz) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />Constructor constructor = constructorCache.computeIfAbsent(clazz, c -> {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />return c.getDeclaredConstructor();<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />});<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />return constructor.newInstance();}

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设计模式 - Spring是经典设计模式的忠实拥趸

Spring框架中应用了大量的设计模式：
设计模式应用场景举例工厂模式Bean的创建ApplicationContext就是Bean工厂单例模式Bean的作用域默认的单例Bean代理模式AOP实现JDK动态代理、CGLIB代理模板方法模式固定流程封装JdbcTemplate、RestTemplate策略模式不同的实现策略RowMapper结果映射观察者模式事件机制BeanPostProcessor前端控制器模式Web MVCDispatcherServlet注册表模式Bean定义管理BeanDefinitionRegistry学习Spring，也是在学习如何优雅地应用设计模式。
并发安全 - ConcurrentHashMap的选择

Spring容器是线程安全的，SpringWind也要保证这一点。我们使用ConcurrentHashMap而不是Hashtable或加锁的HashMap：

1. // ✓ 推荐：ConcurrentHashMapprivate Map singletonObjects = new ConcurrentHashMap();// ✗ 不推荐：Hashtable（方法级锁，性能差）private Map singletonObjects = new Hashtable();// ✗ 不推荐：synchronized包装（同样是粗粒度锁）private Map singletonObjects =<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />Collections.synchronizedMap(new HashMap());

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ConcurrentHashMap使用分段锁，并发性能远高于Hashtable。
参照Spring框架设计Springwind的架构

整体架构设计

SpringWind采用分层架构，从下到上分为四层：

1. ┌─────────────────────────────────────────────────────────────┐│<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" /><bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />应用层 (Application Layer)<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />││  开发者编写的业务代码：Controller、Service、DAO、Repository<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />  │└─────────────────────────────────────────────────────────────┘<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" /> ↓┌─────────────────────────────────────────────────────────────┐│<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" /><bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" /><bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />框架层 (Framework Layer)<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" /><bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" />  ││  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────┐  ││  │   Web MVC   │  │<bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /> AOP<bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" /> │  │   JDBC Template<bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" /> │  ││  └─────────────┘  └─────────────┘  └─────────────────────┘  │└─────────────────────────────────────────────────────────────┘<bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" /><bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" /><bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" /><bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" /><bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" /><bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" /><bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" /> ↓┌─────────────────────────────────────────────────────────────┐│<bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" /><bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" /><bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" /><bean id="userService" >
119.     <property name="userDao" ref="userDao"/>
120. </bean>
121. <bean id="userDao" /> 核心容器层 (Core Container Layer)<bean id="userService" >
122.     <property name="userDao" ref="userDao"/>
123. </bean>
124. <bean id="userDao" /><bean id="userService" >
125.     <property name="userDao" ref="userDao"/>
126. </bean>
127. <bean id="userDao" /><bean id="userService" >
128.     <property name="userDao" ref="userDao"/>
129. </bean>
130. <bean id="userDao" /> ││  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────┐  ││  │ Bean 定义   │  │ 依赖注入<bean id="userService" >
131.     <property name="userDao" ref="userDao"/>
132. </bean>
133. <bean id="userDao" />  │  │ 生命周期管理<bean id="userService" >
134.     <property name="userDao" ref="userDao"/>
135. </bean>
136. <bean id="userDao" /><bean id="userService" >
137.     <property name="userDao" ref="userDao"/>
138. </bean>
139. <bean id="userDao" />  │  ││  │ 管理<bean id="userService" >
140.     <property name="userDao" ref="userDao"/>
141. </bean>
142. <bean id="userDao" /><bean id="userService" >
143.     <property name="userDao" ref="userDao"/>
144. </bean>
145. <bean id="userDao" />│  │<bean id="userService" >
146.     <property name="userDao" ref="userDao"/>
147. </bean>
148. <bean id="userDao" /><bean id="userService" >
149.     <property name="userDao" ref="userDao"/>
150. </bean>
151. <bean id="userDao" /><bean id="userService" >
152.     <property name="userDao" ref="userDao"/>
153. </bean>
154. <bean id="userDao" />  │  │<bean id="userService" >
155.     <property name="userDao" ref="userDao"/>
156. </bean>
157. <bean id="userDao" /><bean id="userService" >
158.     <property name="userDao" ref="userDao"/>
159. </bean>
160. <bean id="userDao" /><bean id="userService" >
161.     <property name="userDao" ref="userDao"/>
162. </bean>
163. <bean id="userDao" /><bean id="userService" >
164.     <property name="userDao" ref="userDao"/>
165. </bean>
166. <bean id="userDao" /><bean id="userService" >
167.     <property name="userDao" ref="userDao"/>
168. </bean>
169. <bean id="userDao" /> │  ││  └─────────────┘  └─────────────┘  └─────────────────────┘  ││  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────┐  ││  │ 单例池<bean id="userService" >
170.     <property name="userDao" ref="userDao"/>
171. </bean>
172. <bean id="userDao" />   │  │ 循环依赖<bean id="userService" >
173.     <property name="userDao" ref="userDao"/>
174. </bean>
175. <bean id="userDao" />  │  │ BeanPost<bean id="userService" >
176.     <property name="userDao" ref="userDao"/>
177. </bean>
178. <bean id="userDao" /><bean id="userService" >
179.     <property name="userDao" ref="userDao"/>
180. </bean>
181. <bean id="userDao" /><bean id="userService" >
182.     <property name="userDao" ref="userDao"/>
183. </bean>
184. <bean id="userDao" />│  ││  │<bean id="userService" >
185.     <property name="userDao" ref="userDao"/>
186. </bean>
187. <bean id="userDao" /><bean id="userService" >
188.     <property name="userDao" ref="userDao"/>
189. </bean>
190. <bean id="userDao" /><bean id="userService" >
191.     <property name="userDao" ref="userDao"/>
192. </bean>
193. <bean id="userDao" /> │  │ 解决<bean id="userService" >
194.     <property name="userDao" ref="userDao"/>
195. </bean>
196. <bean id="userDao" /><bean id="userService" >
197.     <property name="userDao" ref="userDao"/>
198. </bean>
199. <bean id="userDao" /> │  │ Processor<bean id="userService" >
200.     <property name="userDao" ref="userDao"/>
201. </bean>
202. <bean id="userDao" /><bean id="userService" >
203.     <property name="userDao" ref="userDao"/>
204. </bean>
205. <bean id="userDao" />   │  ││  └─────────────┘  └─────────────┘  └─────────────────────┘  │└─────────────────────────────────────────────────────────────┘<bean id="userService" >
206.     <property name="userDao" ref="userDao"/>
207. </bean>
208. <bean id="userDao" /><bean id="userService" >
209.     <property name="userDao" ref="userDao"/>
210. </bean>
211. <bean id="userDao" /><bean id="userService" >
212.     <property name="userDao" ref="userDao"/>
213. </bean>
214. <bean id="userDao" /><bean id="userService" >
215.     <property name="userDao" ref="userDao"/>
216. </bean>
217. <bean id="userDao" /><bean id="userService" >
218.     <property name="userDao" ref="userDao"/>
219. </bean>
220. <bean id="userDao" /><bean id="userService" >
221.     <property name="userDao" ref="userDao"/>
222. </bean>
223. <bean id="userDao" /><bean id="userService" >
224.     <property name="userDao" ref="userDao"/>
225. </bean>
226. <bean id="userDao" /> ↓┌─────────────────────────────────────────────────────────────┐│<bean id="userService" >
227.     <property name="userDao" ref="userDao"/>
228. </bean>
229. <bean id="userDao" /><bean id="userService" >
230.     <property name="userDao" ref="userDao"/>
231. </bean>
232. <bean id="userDao" /><bean id="userService" >
233.     <property name="userDao" ref="userDao"/>
234. </bean>
235. <bean id="userDao" /><bean id="userService" >
236.     <property name="userDao" ref="userDao"/>
237. </bean>
238. <bean id="userDao" />   基础设施层 (Infrastructure Layer)<bean id="userService" >
239.     <property name="userDao" ref="userDao"/>
240. </bean>
241. <bean id="userDao" /><bean id="userService" >
242.     <property name="userDao" ref="userDao"/>
243. </bean>
244. <bean id="userDao" />   ││  反射 API | 类加载器 | 动态代理 | 注解处理 | 并发工具<bean id="userService" >
245.     <property name="userDao" ref="userDao"/>
246. </bean>
247. <bean id="userDao" /><bean id="userService" >
248.     <property name="userDao" ref="userDao"/>
249. </bean>
250. <bean id="userDao" /><bean id="userService" >
251.     <property name="userDao" ref="userDao"/>
252. </bean>
253. <bean id="userDao" /> │└─────────────────────────────────────────────────────────────┘

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核心模块设计

1. IoC容器模块

核心类： SpringWindApplicationContext
主要职责：

• 组件扫描和注册
  
• Bean的创建和缓存
  
• 依赖注入
  
• 生命周期管理
  
• 循环依赖解决（三级缓存）
  

关键代码（SpringWindApplicationContext.java）：

1. public class SpringWindApplicationContext {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// Bean定义映射表（使用ConcurrentHashMap提升并发性能）<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private final Map beanDefinitionMap = new ConcurrentHashMap();<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />// 三级缓存机制（解决循环依赖的核心）<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />// 一级缓存：完整初始化的Bean对象（依赖注入完成、初始化方法执行完成）<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />private final Map singletonObjects = new ConcurrentHashMap();<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />// 二级缓存：早期Bean引用（已实例化但未完成依赖注入，可能是代理对象）<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />private final Map earlySingletonObjects = new ConcurrentHashMap();<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />// 三级缓存：ObjectFactory工厂对象（关键！延迟生成早期引用，支持AOP提前代理）<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />private final Map, Constructor> constructorCache = new ConcurrentHashMap();<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />public SpringWindApplicationContext(Class configClass) {<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />scanComponents(configClass);<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />  // 1. 扫描组件<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />createSingletonBeans();<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />   // 2. 创建单例Bean<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />dependencyInjection();<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" /><bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />// 3. 依赖注入<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />invokeInitMethods();<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" /><bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" />  // 4. 执行初始化方法（已在getBean中完成，保留兼容）<bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />}}

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Bean创建流程核心代码（SpringWindApplicationContext.java的getBean方法）：

1. public Object getBean(String beanName) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// 1. 首先从一级缓存获取完全初始化好的Bean<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />Object bean = singletonObjects.get(beanName);<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />if (bean != null) {<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />return bean;<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />}<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />// 2. 检查循环依赖：如果当前Bean正在创建中<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />if (singletonsCurrentlyInCreation.contains(beanName)) {<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />// 先从二级缓存获取早期对象<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />bean = earlySingletonObjects.get(beanName);<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />if (bean != null) {<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />return bean;<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />}<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />// 如果二级缓存没有，尝试从三级缓存获取ObjectFactory<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" /><bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" />ObjectFactory factory = singletonFactories.get(beanName);<bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />if (factory != null) {<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /><bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />// 调用ObjectFactory获取早期对象，并放入二级缓存<bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" /><bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" /><bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" />bean = factory.getObject();  // 此处关键！可能创建AOP代理<bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" /><bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" /><bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" />earlySingletonObjects.put(beanName, bean);<bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" /><bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" /><bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" />singletonFactories.remove(beanName);<bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" /><bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" /><bean id="userService" >
119.     <property name="userDao" ref="userDao"/>
120. </bean>
121. <bean id="userDao" />return bean;<bean id="userService" >
122.     <property name="userDao" ref="userDao"/>
123. </bean>
124. <bean id="userDao" /><bean id="userService" >
125.     <property name="userDao" ref="userDao"/>
126. </bean>
127. <bean id="userDao" />}<bean id="userService" >
128.     <property name="userDao" ref="userDao"/>
129. </bean>
130. <bean id="userDao" />}<bean id="userService" >
131.     <property name="userDao" ref="userDao"/>
132. </bean>
133. <bean id="userDao" />// 3. 标记为正在创建<bean id="userService" >
134.     <property name="userDao" ref="userDao"/>
135. </bean>
136. <bean id="userDao" />singletonsCurrentlyInCreation.add(beanName);<bean id="userService" >
137.     <property name="userDao" ref="userDao"/>
138. </bean>
139. <bean id="userDao" />try {<bean id="userService" >
140.     <property name="userDao" ref="userDao"/>
141. </bean>
142. <bean id="userDao" /><bean id="userService" >
143.     <property name="userDao" ref="userDao"/>
144. </bean>
145. <bean id="userDao" />// 4. 实例化<bean id="userService" >
146.     <property name="userDao" ref="userDao"/>
147. </bean>
148. <bean id="userDao" /><bean id="userService" >
149.     <property name="userDao" ref="userDao"/>
150. </bean>
151. <bean id="userDao" />bean = createBeanInstance(beanDefinition.getBeanClass());<bean id="userService" >
152.     <property name="userDao" ref="userDao"/>
153. </bean>
154. <bean id="userDao" /><bean id="userService" >
155.     <property name="userDao" ref="userDao"/>
156. </bean>
157. <bean id="userDao" />// 5. 放入三级缓存（ObjectFactory，支持AOP提前创建代理）<bean id="userService" >
158.     <property name="userDao" ref="userDao"/>
159. </bean>
160. <bean id="userDao" /><bean id="userService" >
161.     <property name="userDao" ref="userDao"/>
162. </bean>
163. <bean id="userDao" />final Object rawBean = bean;<bean id="userService" >
164.     <property name="userDao" ref="userDao"/>
165. </bean>
166. <bean id="userDao" /><bean id="userService" >
167.     <property name="userDao" ref="userDao"/>
168. </bean>
169. <bean id="userDao" />singletonFactories.put(beanName, () -> getEarlyBeanReference(beanName, rawBean));<bean id="userService" >
170.     <property name="userDao" ref="userDao"/>
171. </bean>
172. <bean id="userDao" /><bean id="userService" >
173.     <property name="userDao" ref="userDao"/>
174. </bean>
175. <bean id="userDao" />// 6. 依赖注入（可能触发循环依赖）<bean id="userService" >
176.     <property name="userDao" ref="userDao"/>
177. </bean>
178. <bean id="userDao" /><bean id="userService" >
179.     <property name="userDao" ref="userDao"/>
180. </bean>
181. <bean id="userDao" />doDependencyInjection(bean);<bean id="userService" >
182.     <property name="userDao" ref="userDao"/>
183. </bean>
184. <bean id="userDao" /><bean id="userService" >
185.     <property name="userDao" ref="userDao"/>
186. </bean>
187. <bean id="userDao" />// 7. 前置处理器<bean id="userService" >
188.     <property name="userDao" ref="userDao"/>
189. </bean>
190. <bean id="userDao" /><bean id="userService" >
191.     <property name="userDao" ref="userDao"/>
192. </bean>
193. <bean id="userDao" />bean = applyBeanPostProcessorsBeforeInitialization(bean, beanName);<bean id="userService" >
194.     <property name="userDao" ref="userDao"/>
195. </bean>
196. <bean id="userDao" /><bean id="userService" >
197.     <property name="userDao" ref="userDao"/>
198. </bean>
199. <bean id="userDao" />// 8. @PostConstruct初始化方法<bean id="userService" >
200.     <property name="userDao" ref="userDao"/>
201. </bean>
202. <bean id="userDao" /><bean id="userService" >
203.     <property name="userDao" ref="userDao"/>
204. </bean>
205. <bean id="userDao" />if (beanDefinition.getInitMethod() != null) {<bean id="userService" >
206.     <property name="userDao" ref="userDao"/>
207. </bean>
208. <bean id="userDao" /><bean id="userService" >
209.     <property name="userDao" ref="userDao"/>
210. </bean>
211. <bean id="userDao" /><bean id="userService" >
212.     <property name="userDao" ref="userDao"/>
213. </bean>
214. <bean id="userDao" />beanDefinition.getInitMethod().invoke(bean);<bean id="userService" >
215.     <property name="userDao" ref="userDao"/>
216. </bean>
217. <bean id="userDao" /><bean id="userService" >
218.     <property name="userDao" ref="userDao"/>
219. </bean>
220. <bean id="userDao" />}<bean id="userService" >
221.     <property name="userDao" ref="userDao"/>
222. </bean>
223. <bean id="userDao" /><bean id="userService" >
224.     <property name="userDao" ref="userDao"/>
225. </bean>
226. <bean id="userDao" />// 9. 后置处理器（AOP通常在这里发生）<bean id="userService" >
227.     <property name="userDao" ref="userDao"/>
228. </bean>
229. <bean id="userDao" /><bean id="userService" >
230.     <property name="userDao" ref="userDao"/>
231. </bean>
232. <bean id="userDao" />bean = applyBeanPostProcessorsAfterInitialization(bean, beanName);<bean id="userService" >
233.     <property name="userDao" ref="userDao"/>
234. </bean>
235. <bean id="userDao" /><bean id="userService" >
236.     <property name="userDao" ref="userDao"/>
237. </bean>
238. <bean id="userDao" />// 10. 放入一级缓存（完全初始化好的Bean）<bean id="userService" >
239.     <property name="userDao" ref="userDao"/>
240. </bean>
241. <bean id="userDao" /><bean id="userService" >
242.     <property name="userDao" ref="userDao"/>
243. </bean>
244. <bean id="userDao" />singletonObjects.put(beanName, bean);<bean id="userService" >
245.     <property name="userDao" ref="userDao"/>
246. </bean>
247. <bean id="userDao" /><bean id="userService" >
248.     <property name="userDao" ref="userDao"/>
249. </bean>
250. <bean id="userDao" />// 11. 清理二级缓存和三级缓存<bean id="userService" >
251.     <property name="userDao" ref="userDao"/>
252. </bean>
253. <bean id="userDao" /><bean id="userService" >
254.     <property name="userDao" ref="userDao"/>
255. </bean>
256. <bean id="userDao" />earlySingletonObjects.remove(beanName);<bean id="userService" >
257.     <property name="userDao" ref="userDao"/>
258. </bean>
259. <bean id="userDao" /><bean id="userService" >
260.     <property name="userDao" ref="userDao"/>
261. </bean>
262. <bean id="userDao" />singletonFactories.remove(beanName);<bean id="userService" >
263.     <property name="userDao" ref="userDao"/>
264. </bean>
265. <bean id="userDao" /><bean id="userService" >
266.     <property name="userDao" ref="userDao"/>
267. </bean>
268. <bean id="userDao" />return bean;<bean id="userService" >
269.     <property name="userDao" ref="userDao"/>
270. </bean>
271. <bean id="userDao" />} finally {<bean id="userService" >
272.     <property name="userDao" ref="userDao"/>
273. </bean>
274. <bean id="userDao" /><bean id="userService" >
275.     <property name="userDao" ref="userDao"/>
276. </bean>
277. <bean id="userDao" />// 12. 从正在创建集合中移除<bean id="userService" >
278.     <property name="userDao" ref="userDao"/>
279. </bean>
280. <bean id="userDao" /><bean id="userService" >
281.     <property name="userDao" ref="userDao"/>
282. </bean>
283. <bean id="userDao" />singletonsCurrentlyInCreation.remove(beanName);<bean id="userService" >
284.     <property name="userDao" ref="userDao"/>
285. </bean>
286. <bean id="userDao" />}}

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关键点：

• 步骤5：放入的是ObjectFactory，而不是Bean本身，这是三级缓存的精髓
  
• 步骤6：依赖注入时可能触发循环依赖，会走步骤2的逻辑
  
• 步骤9：如果在getEarlyBeanReference中已创建代理，这里会检测并跳过
  

2. AOP模块

核心类： AspectProcessor、SmartInstantiationAwareBeanPostProcessor、AopInvocationHandler、AopMethodInterceptor
主要职责：

• 切面注册和管理
  
• 代理对象创建（JDK动态代理/CGLIB字节码增强）
  
• 切点匹配和通知执行
  
• 早期代理创建（通过SmartInstantiationAwareBeanPostProcessor解决循环依赖+AOP的组合问题）
  

关键设计：AspectProcessor实现SmartInstantiationAwareBeanPostProcessor接口
这是解决"循环依赖+AOP"场景的核心设计：

1. public class AspectProcessor implements SmartInstantiationAwareBeanPostProcessor {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// 在Bean早期引用被获取时调用（循环依赖场景）<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />@Override<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />public Object getEarlyBeanReference(Object bean, String beanName) {<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />// 如果Bean需要AOP代理，在这里提前创建<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />if (shouldProxy(bean)) {<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />return createProxy(bean);  // 创建代理对象<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />}<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />return bean;  // 不需要代理，返回原始对象<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />}<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />// 在Bean初始化后调用（正常场景）<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />@Override<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" />public Object postProcessAfterInitialization(Object bean, String beanName) {<bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" /><bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" />// 如果已经在getEarlyBeanReference中创建了代理，这里跳过<bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" /><bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />if (已经创建过代理) {<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />return bean;<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" />}<bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" /><bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" />// 否则在这里创建代理<bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" /><bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" />if (shouldProxy(bean)) {<bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" /><bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" /><bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" />return createProxy(bean);<bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" /><bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" />}<bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" /><bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" />return bean;<bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" />}}

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工作原理：

• 正常场景（无循环依赖）：
  
  
  
  • getEarlyBeanReference不会被调用
    
  • 在postProcessAfterInitialization中创建AOP代理
    
  
  
• 循环依赖场景：
  
  
  
  • 当Bean A被Bean B依赖时，会触发ObjectFactory.getObject()
    
  • getObject()内部调用getEarlyBeanReference(beanA)
    
  • 在getEarlyBeanReference中提前创建AOP代理
    
  • 代理对象被放入二级缓存，B获取到的是代理
    
  • 后续postProcessAfterInitialization检测到已创建代理，跳过
    
  
  

为什么需要这个机制？

• 如果不在getEarlyBeanReference中创建代理，B获取到的是原始对象
  
• 后续在postProcessAfterInitialization创建代理后，A持有的是代理对象，但B持有的仍是原始对象
  
• 导致同一个Bean存在两个不同的对象，违反了单例原则
  

通过SmartInstantiationAwareBeanPostProcessor，确保：

• 循环依赖的所有Bean获取到同一个代理对象
  
• 不会产生多个不同的代理或原始对象
  

代理创建逻辑（AspectProcessor.java）：

1. public Object createProxy(Object target) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />List matchedAspects = findMatchedAspects(target.getClass());<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />if (matchedAspects.isEmpty()) {<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />return target;  // 没有切面，返回原始对象<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />}<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />// 如果实现了接口，使用JDK动态代理<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />Class[] interfaces = target.getClass().getInterfaces();<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />if (interfaces.length > 0) {<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />return Proxy.newProxyInstance(<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />target.getClass().getClassLoader(),<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />interfaces,<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" /><bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />new AopInvocationHandler(target, matchedAspects)<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />);<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />}<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" />// 否则使用CGLIB代理<bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />Enhancer enhancer = new Enhancer();<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />enhancer.setSuperclass(target.getClass());<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" />enhancer.setCallback(new AopMethodInterceptor(target, matchedAspects));<bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" />return enhancer.create();}

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3. Web MVC模块

核心类： DispatcherServlet、HandlerMapping、PathMatcher
主要职责：

• 请求路由
  
• 参数解析和绑定
  
• Controller调用
  
• 视图解析
  

请求处理流程：
---title: Spring MVC 请求处理流程---flowchart LR<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />A["HTTP请求"] --> B["DispatcherServlet
前端控制器"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />B --> C["HandlerMapping
处理器映射"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />C --> D["athMatcher
路径匹配器"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />D --> E["参数解析器
@PathVariable
@RequestParam
@RequestBody"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />E --> F["Controller方法
业务逻辑处理"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />F --> G["结果处理器
JSON/视图转换"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />G --> H["HTTP响应"]<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" /><bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />%% 样式定义<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style A fill:#e3f2fd,stroke:#1565c0,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style B fill:#e8f5e8,stroke:#388e3c,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style C fill:#fff3e0,stroke:#f57c00,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style D fill:#fce4ec,stroke:#c2185b,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style E fill:#e1f5fe,stroke:#01579b,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style F fill:#fff8e1,stroke:#ffb300,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style G fill:#f3e5f5,stroke:#7b1fa2,stroke-width:2px<bean id="userService" >
    <property name="userDao" ref="userDao"/>
</bean>
<bean id="userDao" />style H fill:#e8f5e8,stroke:#388e3c,stroke-width:2px4. JDBC模块

核心类： JdbcTemplate、RowMapper
主要职责：

• 连接管理
  
• SQL执行
  
• 结果集映射
  
• 资源关闭
  

模板方法实现：

1. public  List query(String sql, RowMapper mapper, Object... args) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />Connection conn = null;<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />PreparedStatement stmt = null;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />ResultSet rs = null;<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />try {<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />conn = getConnection();<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />// 固定步骤1<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />stmt = prepareStatement(sql);  // 固定步骤2<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />setParameters(stmt, args);<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /> // 固定步骤3<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />rs = stmt.executeQuery();<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />  // 固定步骤4<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" /><bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" />return mapResults(rs, mapper); // 可变步骤（回调）<bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />} catch (SQLException e) {<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />throw new RuntimeException(e);<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />} finally {<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />closeResources(rs, stmt, conn); // 固定步骤5<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />}}

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注解体系设计

SpringWind定义了一套完整的注解体系（共21个注解）：
IoC/DI 注解：
注解作用元注解@Component通用组件-@Service服务层组件@Component@Controller控制器组件@Component@Repository数据访问层组件@Component@Configuration配置类@Component@Autowired依赖注入-@Bean方法级Bean定义-生命周期注解：
注解作用来源@PostConstructBean 初始化方法javax.annotation@PreDestroyBean 销毁方法javax.annotationWeb MVC 注解：
注解作用说明@RequestMappingURL映射（通用）支持所有HTTP方法@GetMappingGET请求映射快捷注解@PostMappingPOST请求映射快捷注解@PutMappingPUT请求映射快捷注解@DeleteMappingDELETE请求映射快捷注解@PathVariable路径变量绑定如 /user/{id}@RequestParam请求参数绑定如 ?name=xxx@RequestBody请求体绑定（JSON）自动反序列化@ResponseBody响应体（JSON）自动序列化AOP 注解：
注解作用通知类型@Aspect标记切面类-@Before前置通知方法执行前@After后置通知方法执行后@Around环绕通知完全控制方法执行事务注解：
注解作用状态@Transactional声明式事务需配合AOP实现性能优化策略

1. 构造器缓存

反射获取构造器的成本较高，缓存起来：

1. private final Map> constructorCache = new ConcurrentHashMap();public Object createBean(Class clazz) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />Constructor constructor = constructorCache.computeIfAbsent(clazz, c -> {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />try {<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />return c.getDeclaredConstructor();<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />} catch (NoSuchMethodException e) {<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />throw new BeanCreationException("找不到无参构造器", e);<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />}<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />});<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />return constructor.newInstance();}

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2. 切点表达式缓存

正则表达式编译很慢，缓存编译后的Pattern：

1. private final Map patternCache = new ConcurrentHashMap();public boolean matches(String pointcut, String methodName) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />Pattern pattern = patternCache.computeIfAbsent(pointcut, p -> {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />String regex = pointcut.replace("*", ".*").replace(".", "\\.");<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />return Pattern.compile(regex);<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />});<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />return pattern.matcher(methodName).matches();}

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3. 使用ConcurrentHashMap

所有需要并发访问的Map都使用ConcurrentHashMap，避免锁竞争。
SpringWind 与 Spring MVC 的对比

了解 SpringWind 与 Spring MVC 的异同，可以帮助你更好地理解框架的设计取舍。
功能对比表

功能特性SpringWindSpring MVC说明IoC 容器✅ 基本实现✅ 完整实现 + 复杂场景SpringWind 实现了单例 Bean 管理、依赖注入、生命周期管理依赖注入✅ 字段注入、方法注入✅ 字段、方法、构造器注入SpringWind 暂不支持构造器注入循环依赖解决✅ 三级缓存 + SmartInstantiationAwareBeanPostProcessor✅ 三级缓存 + 多种策略SpringWind 核心机制与 Spring 相同，都支持早期代理创建BeanPostProcessor✅ 基本实现✅ 完整实现 + 多种类型SpringWind 支持前置和后置处理SmartInstantiation
AwareBeanPostProcessor✅ 支持✅ 完整支持SpringWind 支持在 Bean 实例化早期创建代理，解决循环依赖Bean 作用域⚠️ 仅单例（Singleton）✅ Singleton、Prototype、Request、Session 等SpringWind 只支持单例模式AOP 支持✅ JDK/CGLIB 代理 + 早期代理✅ AspectJ 集成 + 更强大的切点表达式SpringWind 实现了基本的 AOP 功能，支持早期代理创建切面类型✅ @Before、@After、@Around✅ @Before、@After、@Around、@AfterReturning、@AfterThrowingSpringWind 支持三种基本通知类型Web MVC✅ 基本实现✅ 完整的 MVC 栈 + 异步支持SpringWind 实现了核心的请求映射和参数绑定请求映射✅ @RequestMapping✅ @RequestMapping、@GetMapping、@PostMapping 等SpringWind 使用统一的 @RequestMapping参数绑定✅ @PathVariable、@RequestParam、@RequestBody✅ 更多参数类型和转换器SpringWind 支持基本的参数绑定JSON 响应✅ 自动序列化✅ 多种视图解析器SpringWind 使用 Jackson 进行 JSON 序列化JDBC 支持✅ JdbcTemplate✅ JdbcTemplate + JPA/Hibernate 集成SpringWind 实现了 JdbcTemplate 的核心功能生命周期回调✅ @PostConstruct、@PreDestroy✅ @PostConstruct、@PreDestroy、InitializingBean、DisposableBeanSpringWind 支持标准的生命周期回调事务管理❌ 需自行实现✅ 声明式和编程式事务SpringWind 暂不支持，可通过 AOP 自己实现配置方式✅ 注解驱动✅ 注解 + XML + Java ConfigSpringWind 主要使用注解配置国际化（i18n）❌ 不支持✅ MessageSourceSpring 提供完整的国际化支持事件机制❌ 不支持✅ ApplicationEventSpring 提供事件发布和监听机制SpEL 表达式❌ 不支持✅ 完整的表达式语言Spring 支持强大的 SpEL 表达式代码量~5000 行~50 万行SpringWind 代码量相对较小，易于理解学习难度⭐⭐ 容易⭐⭐⭐⭐ 较难SpringWind 适合初学者理解原理生产就绪✅ 教学/小项目✅ 企业级应用Spring 经过大规模生产验证使用场景对比

场景推荐使用原因学习 Spring 原理SpringWind代码简洁，易于理解核心机制企业级应用Spring MVC功能完整，生产就绪小型工具项目SpringWind轻量级，快速启动Demo/原型开发SpringWind简单直接，无需复杂配置大型分布式系统Spring Boot/Cloud完整的生态系统和中间件支持需要事务支持Spring MVCSpringWind 需要自己实现事务需要复杂 AOPSpring MVC支持 AspectJ 和复杂切点表达式快速原型验证SpringWind启动快，依赖少应用代码对比示例

定义一个简单的 Controller：

1. // SpringWind 和 Spring MVC 的代码几乎完全相同@Controller@RequestMapping("/user")public class UserController {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Autowired<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private UserService userService;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />@RequestMapping("/list")<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />@ResponseBody<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />public List list() {<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />return userService.getAllUsers();<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />}<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />@RequestMapping("/get")<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />@ResponseBody<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />public User getUser(@RequestParam("id") Long id) {<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />return userService.getUserById(id);<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />}<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />@RequestMapping("/create")<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />@ResponseBody<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />public User createUser(@RequestBody User user) {<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />return userService.createUser(user);<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" />}}

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启动应用：

1. // SpringWindpublic class Application {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />public static void main(String[] args) {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />// 启动SpringWind应用<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />SpringWindApplication app = SpringWindApplication.run(WebDemoApplication.class, args);<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />// 启动 Tomcat<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />TomcatServer.start(app.getContext());<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />}}// Spring Boot@SpringBootApplicationpublic class Application {<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />public static void main(String[] args) {<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />SpringApplication.run(Application.class, args);<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />}}

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迁移成本

从 SpringWind 迁移到 Spring MVC：

• 难度：⭐⭐ 容易
  
• 工作量：主要是替换依赖和配置
  
• 代码改动：业务代码几乎不需要改动
  
• 注意事项：
  
  
  
  • 添加 Spring Boot Starter 依赖
    
  • 调整配置文件（application.yml/properties）
    
  • 构造器注入需要添加构造器
    
  • 事务注解需要启用 @EnableTransactionManagement
    
  
  

性能对比

指标SpringWindSpring MVC启动时间~200ms~2-5s（Spring Boot）内存占用~50MB~150-300MB依赖数量~5 个~50-100 个jar 包大小~2MB~20-50MB并发性能良好优秀注意：SpringWind 的性能优势主要体现在轻量级场景，没有深入优化高并发，对于大型应用，Spring 的优化更加全面。
学习建议

• 先学 SpringWind，再学 Spring
  
  
  
  • SpringWind 代码量小，容易看懂核心原理
    
  • 理解了原理后，再看 Spring 源码会轻松很多
    
  
  
• 对比学习
  
  
  
  • 用 SpringWind 写一个小项目
    
  • 用 Spring Boot 实现同样的功能
    
  • 对比两者的实现差异
    
  
  
• 渐进式学习
  
  
  
  • IoC/DI → AOP → MVC → JDBC → 事务
    
  • 每个模块都先在 SpringWind 中理解，再看 Spring 的实现
    
  
  

Springwind框架有什么用

SpringWind不是为了替代Spring，而是为了学习Spring，掌握Spring。但它也有自己的价值：
1. 彻底搞懂Spring原理和运行机制

面试常问的问题，SpringWind都有答案：

• IoC容器是怎么工作的？
  看SpringWindApplicationContext的实现，200多行代码就能看懂。
  
• 循环依赖怎么解决的？
  看三级缓存的实现，代码简洁明了。
  
• AOP是怎么实现的？
  看AspectProcessor如何创建代理对象。
  
• @Autowired是怎么注入的？
  看dependencyInjection方法，反射设置字段值。
  
• DispatcherServlet是怎么分发请求的？
  看Web MVC模块，前端控制器模式的经典实现。
  

学习建议：

• 先跑一遍示例项目，看看效果
  
• 打断点调试，看Bean是怎么创建的
  
• 对照Spring源码，理解设计思想
  
• 自己动手改代码，加功能
  

2. 用在小项目上快速开发

Spring确实有点重，一个简单的Web项目，引入Spring Boot全家桶可能有上百个依赖。
SpringWind只有几个核心依赖：

1. <bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" /><bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />jakarta.servlet<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />jakarta.servlet-api<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />cglib<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />cglib<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />org.slf4j<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />slf4j-api<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" />

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适用场景：

• 小型Web应用
  
• 内部工具系统
  
• 学习项目
  
• Demo演示
  

3. 探索新功能，给Spring提建议

SpringWind是一个试验田，你可以：

• 尝试新的设计思路
  
• 验证性能优化方案
  
• 实现Spring没有的功能
  
• 给Spring社区提PR
  

比如，你可以尝试：

• 实现响应式编程支持
  
• 优化Bean创建性能
  
• 简化配置方式
  
• 增强AOP功能
  

Springwind的项目结构

SpringWind的代码组织清晰，模块划分明确：

1. springwind/├── pom.xml<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" /><bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />  # Maven配置├── README.md<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" /><bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /># 项目文档├── src/│   ├── main/│   │   └── java/com/github/microwind/springwind/│   │<bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />   ├── SpringWindApplication.java<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" />  # 框架启动类│   │<bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />   ││   │<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />   ├── annotation/<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" /><bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /> # 注解定义（13个核心注解）│   │<bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />   │   ├── Component.java<bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" /><bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" /><bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" />  # 通用组件│   │<bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" />   │   ├── Service.java<bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" /><bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" /><bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" /><bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" /># 服务层│   │<bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" />   │   ├── Controller.java<bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" /><bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" /><bean id="userService" >
119.     <property name="userDao" ref="userDao"/>
120. </bean>
121. <bean id="userDao" /> # 控制器│   │<bean id="userService" >
122.     <property name="userDao" ref="userDao"/>
123. </bean>
124. <bean id="userDao" />   │   ├── Repository.java<bean id="userService" >
125.     <property name="userDao" ref="userDao"/>
126. </bean>
127. <bean id="userDao" /><bean id="userService" >
128.     <property name="userDao" ref="userDao"/>
129. </bean>
130. <bean id="userDao" /><bean id="userService" >
131.     <property name="userDao" ref="userDao"/>
132. </bean>
133. <bean id="userDao" /> # 数据访问层│   │<bean id="userService" >
134.     <property name="userDao" ref="userDao"/>
135. </bean>
136. <bean id="userDao" />   │   ├── Autowired.java<bean id="userService" >
137.     <property name="userDao" ref="userDao"/>
138. </bean>
139. <bean id="userDao" /><bean id="userService" >
140.     <property name="userDao" ref="userDao"/>
141. </bean>
142. <bean id="userDao" /><bean id="userService" >
143.     <property name="userDao" ref="userDao"/>
144. </bean>
145. <bean id="userDao" />  # 依赖注入│   │<bean id="userService" >
146.     <property name="userDao" ref="userDao"/>
147. </bean>
148. <bean id="userDao" />   │   ├── RequestMapping.java<bean id="userService" >
149.     <property name="userDao" ref="userDao"/>
150. </bean>
151. <bean id="userDao" /><bean id="userService" >
152.     <property name="userDao" ref="userDao"/>
153. </bean>
154. <bean id="userDao" /> # URL映射│   │<bean id="userService" >
155.     <property name="userDao" ref="userDao"/>
156. </bean>
157. <bean id="userDao" />   │   ├── PathVariable.java<bean id="userService" >
158.     <property name="userDao" ref="userDao"/>
159. </bean>
160. <bean id="userDao" /><bean id="userService" >
161.     <property name="userDao" ref="userDao"/>
162. </bean>
163. <bean id="userDao" />   # 路径变量│   │<bean id="userService" >
164.     <property name="userDao" ref="userDao"/>
165. </bean>
166. <bean id="userDao" />   │   ├── RequestParam.java<bean id="userService" >
167.     <property name="userDao" ref="userDao"/>
168. </bean>
169. <bean id="userDao" /><bean id="userService" >
170.     <property name="userDao" ref="userDao"/>
171. </bean>
172. <bean id="userDao" />   # 请求参数│   │<bean id="userService" >
173.     <property name="userDao" ref="userDao"/>
174. </bean>
175. <bean id="userDao" />   │   ├── RequestBody.java<bean id="userService" >
176.     <property name="userDao" ref="userDao"/>
177. </bean>
178. <bean id="userDao" /><bean id="userService" >
179.     <property name="userDao" ref="userDao"/>
180. </bean>
181. <bean id="userDao" /><bean id="userService" >
182.     <property name="userDao" ref="userDao"/>
183. </bean>
184. <bean id="userDao" /># 请求体│   │<bean id="userService" >
185.     <property name="userDao" ref="userDao"/>
186. </bean>
187. <bean id="userDao" />   │   ├── Aspect.java<bean id="userService" >
188.     <property name="userDao" ref="userDao"/>
189. </bean>
190. <bean id="userDao" /><bean id="userService" >
191.     <property name="userDao" ref="userDao"/>
192. </bean>
193. <bean id="userDao" /><bean id="userService" >
194.     <property name="userDao" ref="userDao"/>
195. </bean>
196. <bean id="userDao" /><bean id="userService" >
197.     <property name="userDao" ref="userDao"/>
198. </bean>
199. <bean id="userDao" /> # 切面│   │<bean id="userService" >
200.     <property name="userDao" ref="userDao"/>
201. </bean>
202. <bean id="userDao" />   │   ├── Before.java<bean id="userService" >
203.     <property name="userDao" ref="userDao"/>
204. </bean>
205. <bean id="userDao" /><bean id="userService" >
206.     <property name="userDao" ref="userDao"/>
207. </bean>
208. <bean id="userDao" /><bean id="userService" >
209.     <property name="userDao" ref="userDao"/>
210. </bean>
211. <bean id="userDao" /><bean id="userService" >
212.     <property name="userDao" ref="userDao"/>
213. </bean>
214. <bean id="userDao" /> # 前置通知│   │<bean id="userService" >
215.     <property name="userDao" ref="userDao"/>
216. </bean>
217. <bean id="userDao" />   │   ├── After.java<bean id="userService" >
218.     <property name="userDao" ref="userDao"/>
219. </bean>
220. <bean id="userDao" /><bean id="userService" >
221.     <property name="userDao" ref="userDao"/>
222. </bean>
223. <bean id="userDao" /><bean id="userService" >
224.     <property name="userDao" ref="userDao"/>
225. </bean>
226. <bean id="userDao" /><bean id="userService" >
227.     <property name="userDao" ref="userDao"/>
228. </bean>
229. <bean id="userDao" />  # 后置通知│   │<bean id="userService" >
230.     <property name="userDao" ref="userDao"/>
231. </bean>
232. <bean id="userDao" />   │   └── Around.java<bean id="userService" >
233.     <property name="userDao" ref="userDao"/>
234. </bean>
235. <bean id="userDao" /><bean id="userService" >
236.     <property name="userDao" ref="userDao"/>
237. </bean>
238. <bean id="userDao" /><bean id="userService" >
239.     <property name="userDao" ref="userDao"/>
240. </bean>
241. <bean id="userDao" /><bean id="userService" >
242.     <property name="userDao" ref="userDao"/>
243. </bean>
244. <bean id="userDao" /> # 环绕通知│   │<bean id="userService" >
245.     <property name="userDao" ref="userDao"/>
246. </bean>
247. <bean id="userDao" />   ││   │<bean id="userService" >
248.     <property name="userDao" ref="userDao"/>
249. </bean>
250. <bean id="userDao" />   ├── core/<bean id="userService" >
251.     <property name="userDao" ref="userDao"/>
252. </bean>
253. <bean id="userDao" /><bean id="userService" >
254.     <property name="userDao" ref="userDao"/>
255. </bean>
256. <bean id="userDao" /><bean id="userService" >
257.     <property name="userDao" ref="userDao"/>
258. </bean>
259. <bean id="userDao" /><bean id="userService" >
260.     <property name="userDao" ref="userDao"/>
261. </bean>
262. <bean id="userDao" /><bean id="userService" >
263.     <property name="userDao" ref="userDao"/>
264. </bean>
265. <bean id="userDao" /><bean id="userService" >
266.     <property name="userDao" ref="userDao"/>
267. </bean>
268. <bean id="userDao" />   # 核心IoC容器│   │<bean id="userService" >
269.     <property name="userDao" ref="userDao"/>
270. </bean>
271. <bean id="userDao" />   │   ├── SpringWindApplicationContext.java  # IoC容器核心│   │<bean id="userService" >
272.     <property name="userDao" ref="userDao"/>
273. </bean>
274. <bean id="userDao" />   │   ├── BeanDefinition.java<bean id="userService" >
275.     <property name="userDao" ref="userDao"/>
276. </bean>
277. <bean id="userDao" /><bean id="userService" >
278.     <property name="userDao" ref="userDao"/>
279. </bean>
280. <bean id="userDao" /> # Bean定义│   │<bean id="userService" >
281.     <property name="userDao" ref="userDao"/>
282. </bean>
283. <bean id="userDao" />   │   ├── BeanPostProcessor.java<bean id="userService" >
284.     <property name="userDao" ref="userDao"/>
285. </bean>
286. <bean id="userDao" />  # Bean后处理器│   │<bean id="userService" >
287.     <property name="userDao" ref="userDao"/>
288. </bean>
289. <bean id="userDao" />   │   └── PropertyValue.java<bean id="userService" >
290.     <property name="userDao" ref="userDao"/>
291. </bean>
292. <bean id="userDao" /><bean id="userService" >
293.     <property name="userDao" ref="userDao"/>
294. </bean>
295. <bean id="userDao" />  # 属性值│   │<bean id="userService" >
296.     <property name="userDao" ref="userDao"/>
297. </bean>
298. <bean id="userDao" />   ││   │<bean id="userService" >
299.     <property name="userDao" ref="userDao"/>
300. </bean>
301. <bean id="userDao" />   ├── aop/<bean id="userService" >
302.     <property name="userDao" ref="userDao"/>
303. </bean>
304. <bean id="userDao" /><bean id="userService" >
305.     <property name="userDao" ref="userDao"/>
306. </bean>
307. <bean id="userDao" /><bean id="userService" >
308.     <property name="userDao" ref="userDao"/>
309. </bean>
310. <bean id="userDao" /><bean id="userService" >
311.     <property name="userDao" ref="userDao"/>
312. </bean>
313. <bean id="userDao" /><bean id="userService" >
314.     <property name="userDao" ref="userDao"/>
315. </bean>
316. <bean id="userDao" /><bean id="userService" >
317.     <property name="userDao" ref="userDao"/>
318. </bean>
319. <bean id="userDao" /><bean id="userService" >
320.     <property name="userDao" ref="userDao"/>
321. </bean>
322. <bean id="userDao" /># AOP实现│   │<bean id="userService" >
323.     <property name="userDao" ref="userDao"/>
324. </bean>
325. <bean id="userDao" />   │   ├── AspectProcessor.java<bean id="userService" >
326.     <property name="userDao" ref="userDao"/>
327. </bean>
328. <bean id="userDao" /><bean id="userService" >
329.     <property name="userDao" ref="userDao"/>
330. </bean>
331. <bean id="userDao" /># 切面处理器│   │<bean id="userService" >
332.     <property name="userDao" ref="userDao"/>
333. </bean>
334. <bean id="userDao" />   │   ├── AspectInfo.java<bean id="userService" >
335.     <property name="userDao" ref="userDao"/>
336. </bean>
337. <bean id="userDao" /><bean id="userService" >
338.     <property name="userDao" ref="userDao"/>
339. </bean>
340. <bean id="userDao" /><bean id="userService" >
341.     <property name="userDao" ref="userDao"/>
342. </bean>
343. <bean id="userDao" /> # 切面信息│   │<bean id="userService" >
344.     <property name="userDao" ref="userDao"/>
345. </bean>
346. <bean id="userDao" />   │   ├── AspectType.java<bean id="userService" >
347.     <property name="userDao" ref="userDao"/>
348. </bean>
349. <bean id="userDao" /><bean id="userService" >
350.     <property name="userDao" ref="userDao"/>
351. </bean>
352. <bean id="userDao" /><bean id="userService" >
353.     <property name="userDao" ref="userDao"/>
354. </bean>
355. <bean id="userDao" /> # 通知类型│   │<bean id="userService" >
356.     <property name="userDao" ref="userDao"/>
357. </bean>
358. <bean id="userDao" />   │   └── AopInvocationHandler.java   # AOP调用处理器│   │<bean id="userService" >
359.     <property name="userDao" ref="userDao"/>
360. </bean>
361. <bean id="userDao" />   ││   │<bean id="userService" >
362.     <property name="userDao" ref="userDao"/>
363. </bean>
364. <bean id="userDao" />   ├── jdbc/<bean id="userService" >
365.     <property name="userDao" ref="userDao"/>
366. </bean>
367. <bean id="userDao" /><bean id="userService" >
368.     <property name="userDao" ref="userDao"/>
369. </bean>
370. <bean id="userDao" /><bean id="userService" >
371.     <property name="userDao" ref="userDao"/>
372. </bean>
373. <bean id="userDao" /><bean id="userService" >
374.     <property name="userDao" ref="userDao"/>
375. </bean>
376. <bean id="userDao" /><bean id="userService" >
377.     <property name="userDao" ref="userDao"/>
378. </bean>
379. <bean id="userDao" /><bean id="userService" >
380.     <property name="userDao" ref="userDao"/>
381. </bean>
382. <bean id="userDao" />   # JDBC模板│   │<bean id="userService" >
383.     <property name="userDao" ref="userDao"/>
384. </bean>
385. <bean id="userDao" />   │   ├── JdbcTemplate.java<bean id="userService" >
386.     <property name="userDao" ref="userDao"/>
387. </bean>
388. <bean id="userDao" /><bean id="userService" >
389.     <property name="userDao" ref="userDao"/>
390. </bean>
391. <bean id="userDao" />   # JDBC模板类│   │<bean id="userService" >
392.     <property name="userDao" ref="userDao"/>
393. </bean>
394. <bean id="userDao" />   │   └── RowMapper.java<bean id="userService" >
395.     <property name="userDao" ref="userDao"/>
396. </bean>
397. <bean id="userDao" /><bean id="userService" >
398.     <property name="userDao" ref="userDao"/>
399. </bean>
400. <bean id="userDao" /><bean id="userService" >
401.     <property name="userDao" ref="userDao"/>
402. </bean>
403. <bean id="userDao" />  # 结果集映射│   │<bean id="userService" >
404.     <property name="userDao" ref="userDao"/>
405. </bean>
406. <bean id="userDao" />   ││   │<bean id="userService" >
407.     <property name="userDao" ref="userDao"/>
408. </bean>
409. <bean id="userDao" />   ├── web/<bean id="userService" >
410.     <property name="userDao" ref="userDao"/>
411. </bean>
412. <bean id="userDao" /><bean id="userService" >
413.     <property name="userDao" ref="userDao"/>
414. </bean>
415. <bean id="userDao" /><bean id="userService" >
416.     <property name="userDao" ref="userDao"/>
417. </bean>
418. <bean id="userDao" /><bean id="userService" >
419.     <property name="userDao" ref="userDao"/>
420. </bean>
421. <bean id="userDao" /><bean id="userService" >
422.     <property name="userDao" ref="userDao"/>
423. </bean>
424. <bean id="userDao" /><bean id="userService" >
425.     <property name="userDao" ref="userDao"/>
426. </bean>
427. <bean id="userDao" /><bean id="userService" >
428.     <property name="userDao" ref="userDao"/>
429. </bean>
430. <bean id="userDao" /># Web MVC│   │<bean id="userService" >
431.     <property name="userDao" ref="userDao"/>
432. </bean>
433. <bean id="userDao" />   │   ├── DispatcherServlet.java<bean id="userService" >
434.     <property name="userDao" ref="userDao"/>
435. </bean>
436. <bean id="userDao" />  # 前端控制器│   │<bean id="userService" >
437.     <property name="userDao" ref="userDao"/>
438. </bean>
439. <bean id="userDao" />   │   ├── HandlerMapping.java<bean id="userService" >
440.     <property name="userDao" ref="userDao"/>
441. </bean>
442. <bean id="userDao" /><bean id="userService" >
443.     <property name="userDao" ref="userDao"/>
444. </bean>
445. <bean id="userDao" /> # 处理器映射│   │<bean id="userService" >
446.     <property name="userDao" ref="userDao"/>
447. </bean>
448. <bean id="userDao" />   │   ├── PathMatcher.java<bean id="userService" >
449.     <property name="userDao" ref="userDao"/>
450. </bean>
451. <bean id="userDao" /><bean id="userService" >
452.     <property name="userDao" ref="userDao"/>
453. </bean>
454. <bean id="userDao" /><bean id="userService" >
455.     <property name="userDao" ref="userDao"/>
456. </bean>
457. <bean id="userDao" /># 路径匹配器│   │<bean id="userService" >
458.     <property name="userDao" ref="userDao"/>
459. </bean>
460. <bean id="userDao" />   │   ├── ViewResult.java<bean id="userService" >
461.     <property name="userDao" ref="userDao"/>
462. </bean>
463. <bean id="userDao" /><bean id="userService" >
464.     <property name="userDao" ref="userDao"/>
465. </bean>
466. <bean id="userDao" /><bean id="userService" >
467.     <property name="userDao" ref="userDao"/>
468. </bean>
469. <bean id="userDao" /> # 视图结果│   │<bean id="userService" >
470.     <property name="userDao" ref="userDao"/>
471. </bean>
472. <bean id="userDao" />   │   ├── HttpRequestUtil.java<bean id="userService" >
473.     <property name="userDao" ref="userDao"/>
474. </bean>
475. <bean id="userDao" /><bean id="userService" >
476.     <property name="userDao" ref="userDao"/>
477. </bean>
478. <bean id="userDao" /># HTTP工具│   │<bean id="userService" >
479.     <property name="userDao" ref="userDao"/>
480. </bean>
481. <bean id="userDao" />   │   └── JsonUtil.java<bean id="userService" >
482.     <property name="userDao" ref="userDao"/>
483. </bean>
484. <bean id="userDao" /><bean id="userService" >
485.     <property name="userDao" ref="userDao"/>
486. </bean>
487. <bean id="userDao" /><bean id="userService" >
488.     <property name="userDao" ref="userDao"/>
489. </bean>
490. <bean id="userDao" />   # JSON工具│   │<bean id="userService" >
491.     <property name="userDao" ref="userDao"/>
492. </bean>
493. <bean id="userDao" />   ││   │<bean id="userService" >
494.     <property name="userDao" ref="userDao"/>
495. </bean>
496. <bean id="userDao" />   ├── exception/<bean id="userService" >
497.     <property name="userDao" ref="userDao"/>
498. </bean>
499. <bean id="userDao" /><bean id="userService" >
500.     <property name="userDao" ref="userDao"/>
501. </bean>
502. <bean id="userDao" /><bean id="userService" >
503.     <property name="userDao" ref="userDao"/>
504. </bean>
505. <bean id="userDao" /><bean id="userService" >
506.     <property name="userDao" ref="userDao"/>
507. </bean>
508. <bean id="userDao" /><bean id="userService" >
509.     <property name="userDao" ref="userDao"/>
510. </bean>
511. <bean id="userDao" />  # 异常定义│   │<bean id="userService" >
512.     <property name="userDao" ref="userDao"/>
513. </bean>
514. <bean id="userDao" />   │   ├── BeanCreationException.java│   │<bean id="userService" >
515.     <property name="userDao" ref="userDao"/>
516. </bean>
517. <bean id="userDao" />   │   ├── BeanNotFoundException.java│   │<bean id="userService" >
518.     <property name="userDao" ref="userDao"/>
519. </bean>
520. <bean id="userDao" />   │   └── CircularDependencyException.java│   │<bean id="userService" >
521.     <property name="userDao" ref="userDao"/>
522. </bean>
523. <bean id="userDao" />   ││   │<bean id="userService" >
524.     <property name="userDao" ref="userDao"/>
525. </bean>
526. <bean id="userDao" />   └── util/<bean id="userService" >
527.     <property name="userDao" ref="userDao"/>
528. </bean>
529. <bean id="userDao" /><bean id="userService" >
530.     <property name="userDao" ref="userDao"/>
531. </bean>
532. <bean id="userDao" /><bean id="userService" >
533.     <property name="userDao" ref="userDao"/>
534. </bean>
535. <bean id="userDao" /><bean id="userService" >
536.     <property name="userDao" ref="userDao"/>
537. </bean>
538. <bean id="userDao" /><bean id="userService" >
539.     <property name="userDao" ref="userDao"/>
540. </bean>
541. <bean id="userDao" /><bean id="userService" >
542.     <property name="userDao" ref="userDao"/>
543. </bean>
544. <bean id="userDao" />   # 工具类│   │<bean id="userService" >
545.     <property name="userDao" ref="userDao"/>
546. </bean>
547. <bean id="userDao" /><bean id="userService" >
548.     <property name="userDao" ref="userDao"/>
549. </bean>
550. <bean id="userDao" />   ├── ClassScanner.java<bean id="userService" >
551.     <property name="userDao" ref="userDao"/>
552. </bean>
553. <bean id="userDao" /><bean id="userService" >
554.     <property name="userDao" ref="userDao"/>
555. </bean>
556. <bean id="userDao" />   # 类扫描器│   │<bean id="userService" >
557.     <property name="userDao" ref="userDao"/>
558. </bean>
559. <bean id="userDao" /><bean id="userService" >
560.     <property name="userDao" ref="userDao"/>
561. </bean>
562. <bean id="userDao" />   └── StringUtils.java<bean id="userService" >
563.     <property name="userDao" ref="userDao"/>
564. </bean>
565. <bean id="userDao" /><bean id="userService" >
566.     <property name="userDao" ref="userDao"/>
567. </bean>
568. <bean id="userDao" /><bean id="userService" >
569.     <property name="userDao" ref="userDao"/>
570. </bean>
571. <bean id="userDao" /># 字符串工具│   ││   └── test/<bean id="userService" >
572.     <property name="userDao" ref="userDao"/>
573. </bean>
574. <bean id="userDao" /><bean id="userService" >
575.     <property name="userDao" ref="userDao"/>
576. </bean>
577. <bean id="userDao" /><bean id="userService" >
578.     <property name="userDao" ref="userDao"/>
579. </bean>
580. <bean id="userDao" /><bean id="userService" >
581.     <property name="userDao" ref="userDao"/>
582. </bean>
583. <bean id="userDao" /><bean id="userService" >
584.     <property name="userDao" ref="userDao"/>
585. </bean>
586. <bean id="userDao" /><bean id="userService" >
587.     <property name="userDao" ref="userDao"/>
588. </bean>
589. <bean id="userDao" /><bean id="userService" >
590.     <property name="userDao" ref="userDao"/>
591. </bean>
592. <bean id="userDao" /><bean id="userService" >
593.     <property name="userDao" ref="userDao"/>
594. </bean>
595. <bean id="userDao" />   # 测试代码│<bean id="userService" >
596.     <property name="userDao" ref="userDao"/>
597. </bean>
598. <bean id="userDao" />   ├── java/│<bean id="userService" >
599.     <property name="userDao" ref="userDao"/>
600. </bean>
601. <bean id="userDao" />   │   ├── IoCTest.java<bean id="userService" >
602.     <property name="userDao" ref="userDao"/>
603. </bean>
604. <bean id="userDao" /><bean id="userService" >
605.     <property name="userDao" ref="userDao"/>
606. </bean>
607. <bean id="userDao" /><bean id="userService" >
608.     <property name="userDao" ref="userDao"/>
609. </bean>
610. <bean id="userDao" /><bean id="userService" >
611.     <property name="userDao" ref="userDao"/>
612. </bean>
613. <bean id="userDao" /><bean id="userService" >
614.     <property name="userDao" ref="userDao"/>
615. </bean>
616. <bean id="userDao" /># IoC容器测试│<bean id="userService" >
617.     <property name="userDao" ref="userDao"/>
618. </bean>
619. <bean id="userDao" />   │   ├── AopTest.java<bean id="userService" >
620.     <property name="userDao" ref="userDao"/>
621. </bean>
622. <bean id="userDao" /><bean id="userService" >
623.     <property name="userDao" ref="userDao"/>
624. </bean>
625. <bean id="userDao" /><bean id="userService" >
626.     <property name="userDao" ref="userDao"/>
627. </bean>
628. <bean id="userDao" /><bean id="userService" >
629.     <property name="userDao" ref="userDao"/>
630. </bean>
631. <bean id="userDao" /><bean id="userService" >
632.     <property name="userDao" ref="userDao"/>
633. </bean>
634. <bean id="userDao" /># AOP测试│<bean id="userService" >
635.     <property name="userDao" ref="userDao"/>
636. </bean>
637. <bean id="userDao" />   │   ├── MvcTest.java<bean id="userService" >
638.     <property name="userDao" ref="userDao"/>
639. </bean>
640. <bean id="userDao" /><bean id="userService" >
641.     <property name="userDao" ref="userDao"/>
642. </bean>
643. <bean id="userDao" /><bean id="userService" >
644.     <property name="userDao" ref="userDao"/>
645. </bean>
646. <bean id="userDao" /><bean id="userService" >
647.     <property name="userDao" ref="userDao"/>
648. </bean>
649. <bean id="userDao" /><bean id="userService" >
650.     <property name="userDao" ref="userDao"/>
651. </bean>
652. <bean id="userDao" /># Web MVC测试│<bean id="userService" >
653.     <property name="userDao" ref="userDao"/>
654. </bean>
655. <bean id="userDao" />   │   └── JdbcTest.java<bean id="userService" >
656.     <property name="userDao" ref="userDao"/>
657. </bean>
658. <bean id="userDao" /><bean id="userService" >
659.     <property name="userDao" ref="userDao"/>
660. </bean>
661. <bean id="userDao" /><bean id="userService" >
662.     <property name="userDao" ref="userDao"/>
663. </bean>
664. <bean id="userDao" /><bean id="userService" >
665.     <property name="userDao" ref="userDao"/>
666. </bean>
667. <bean id="userDao" />   # JDBC测试│<bean id="userService" >
668.     <property name="userDao" ref="userDao"/>
669. </bean>
670. <bean id="userDao" />   └── resources/│<bean id="userService" >
671.     <property name="userDao" ref="userDao"/>
672. </bean>
673. <bean id="userDao" /><bean id="userService" >
674.     <property name="userDao" ref="userDao"/>
675. </bean>
676. <bean id="userDao" />   └── test-data.sql│└── examples/<bean id="userService" >
677.     <property name="userDao" ref="userDao"/>
678. </bean>
679. <bean id="userDao" /><bean id="userService" >
680.     <property name="userDao" ref="userDao"/>
681. </bean>
682. <bean id="userDao" /><bean id="userService" >
683.     <property name="userDao" ref="userDao"/>
684. </bean>
685. <bean id="userDao" /><bean id="userService" >
686.     <property name="userDao" ref="userDao"/>
687. </bean>
688. <bean id="userDao" /><bean id="userService" >
689.     <property name="userDao" ref="userDao"/>
690. </bean>
691. <bean id="userDao" /><bean id="userService" >
692.     <property name="userDao" ref="userDao"/>
693. </bean>
694. <bean id="userDao" /><bean id="userService" >
695.     <property name="userDao" ref="userDao"/>
696. </bean>
697. <bean id="userDao" /><bean id="userService" >
698.     <property name="userDao" ref="userDao"/>
699. </bean>
700. <bean id="userDao" /><bean id="userService" >
701.     <property name="userDao" ref="userDao"/>
702. </bean>
703. <bean id="userDao" /># 示例项目<bean id="userService" >
704.     <property name="userDao" ref="userDao"/>
705. </bean>
706. <bean id="userDao" />├── user-demo/<bean id="userService" >
707.     <property name="userDao" ref="userDao"/>
708. </bean>
709. <bean id="userDao" /><bean id="userService" >
710.     <property name="userDao" ref="userDao"/>
711. </bean>
712. <bean id="userDao" /><bean id="userService" >
713.     <property name="userDao" ref="userDao"/>
714. </bean>
715. <bean id="userDao" /><bean id="userService" >
716.     <property name="userDao" ref="userDao"/>
717. </bean>
718. <bean id="userDao" /><bean id="userService" >
719.     <property name="userDao" ref="userDao"/>
720. </bean>
721. <bean id="userDao" /><bean id="userService" >
722.     <property name="userDao" ref="userDao"/>
723. </bean>
724. <bean id="userDao" /><bean id="userService" >
725.     <property name="userDao" ref="userDao"/>
726. </bean>
727. <bean id="userDao" />   # 用户管理示例<bean id="userService" >
728.     <property name="userDao" ref="userDao"/>
729. </bean>
730. <bean id="userDao" />│   ├── src/<bean id="userService" >
731.     <property name="userDao" ref="userDao"/>
732. </bean>
733. <bean id="userDao" />│   │   └── main/java/com/github/microwind/userdemo/<bean id="userService" >
734.     <property name="userDao" ref="userDao"/>
735. </bean>
736. <bean id="userDao" />│   │<bean id="userService" >
737.     <property name="userDao" ref="userDao"/>
738. </bean>
739. <bean id="userDao" />   ├── UserDemoApplication.java<bean id="userService" >
740.     <property name="userDao" ref="userDao"/>
741. </bean>
742. <bean id="userDao" /># 启动类<bean id="userService" >
743.     <property name="userDao" ref="userDao"/>
744. </bean>
745. <bean id="userDao" />│   │<bean id="userService" >
746.     <property name="userDao" ref="userDao"/>
747. </bean>
748. <bean id="userDao" />   ├── config/<bean id="userService" >
749.     <property name="userDao" ref="userDao"/>
750. </bean>
751. <bean id="userDao" /><bean id="userService" >
752.     <property name="userDao" ref="userDao"/>
753. </bean>
754. <bean id="userDao" /><bean id="userService" >
755.     <property name="userDao" ref="userDao"/>
756. </bean>
757. <bean id="userDao" /><bean id="userService" >
758.     <property name="userDao" ref="userDao"/>
759. </bean>
760. <bean id="userDao" /><bean id="userService" >
761.     <property name="userDao" ref="userDao"/>
762. </bean>
763. <bean id="userDao" /> # 配置层<bean id="userService" >
764.     <property name="userDao" ref="userDao"/>
765. </bean>
766. <bean id="userDao" />│   │<bean id="userService" >
767.     <property name="userDao" ref="userDao"/>
768. </bean>
769. <bean id="userDao" />   │   └── DataSourceConfig.java   # 数据源配置<bean id="userService" >
770.     <property name="userDao" ref="userDao"/>
771. </bean>
772. <bean id="userDao" />│   │<bean id="userService" >
773.     <property name="userDao" ref="userDao"/>
774. </bean>
775. <bean id="userDao" />   ├── controller/<bean id="userService" >
776.     <property name="userDao" ref="userDao"/>
777. </bean>
778. <bean id="userDao" /><bean id="userService" >
779.     <property name="userDao" ref="userDao"/>
780. </bean>
781. <bean id="userDao" /><bean id="userService" >
782.     <property name="userDao" ref="userDao"/>
783. </bean>
784. <bean id="userDao" /><bean id="userService" >
785.     <property name="userDao" ref="userDao"/>
786. </bean>
787. <bean id="userDao" /> # 控制器层<bean id="userService" >
788.     <property name="userDao" ref="userDao"/>
789. </bean>
790. <bean id="userDao" />│   │<bean id="userService" >
791.     <property name="userDao" ref="userDao"/>
792. </bean>
793. <bean id="userDao" />   │   ├── UserController.java<bean id="userService" >
794.     <property name="userDao" ref="userDao"/>
795. </bean>
796. <bean id="userDao" /> # 用户CRUD接口<bean id="userService" >
797.     <property name="userDao" ref="userDao"/>
798. </bean>
799. <bean id="userDao" />│   │<bean id="userService" >
800.     <property name="userDao" ref="userDao"/>
801. </bean>
802. <bean id="userDao" />   │   ├── StudentController.java  # 学生管理<bean id="userService" >
803.     <property name="userDao" ref="userDao"/>
804. </bean>
805. <bean id="userDao" />│   │<bean id="userService" >
806.     <property name="userDao" ref="userDao"/>
807. </bean>
808. <bean id="userDao" />   │   └── ClassController.java<bean id="userService" >
809.     <property name="userDao" ref="userDao"/>
810. </bean>
811. <bean id="userDao" /># 班级管理<bean id="userService" >
812.     <property name="userDao" ref="userDao"/>
813. </bean>
814. <bean id="userDao" />│   │<bean id="userService" >
815.     <property name="userDao" ref="userDao"/>
816. </bean>
817. <bean id="userDao" />   ├── service/<bean id="userService" >
818.     <property name="userDao" ref="userDao"/>
819. </bean>
820. <bean id="userDao" /><bean id="userService" >
821.     <property name="userDao" ref="userDao"/>
822. </bean>
823. <bean id="userDao" /><bean id="userService" >
824.     <property name="userDao" ref="userDao"/>
825. </bean>
826. <bean id="userDao" /><bean id="userService" >
827.     <property name="userDao" ref="userDao"/>
828. </bean>
829. <bean id="userDao" /><bean id="userService" >
830.     <property name="userDao" ref="userDao"/>
831. </bean>
832. <bean id="userDao" /># 服务层<bean id="userService" >
833.     <property name="userDao" ref="userDao"/>
834. </bean>
835. <bean id="userDao" />│   │<bean id="userService" >
836.     <property name="userDao" ref="userDao"/>
837. </bean>
838. <bean id="userDao" />   │   ├── UserService.java<bean id="userService" >
839.     <property name="userDao" ref="userDao"/>
840. </bean>
841. <bean id="userDao" />│   │<bean id="userService" >
842.     <property name="userDao" ref="userDao"/>
843. </bean>
844. <bean id="userDao" />   │   ├── StudentService.java<bean id="userService" >
845.     <property name="userDao" ref="userDao"/>
846. </bean>
847. <bean id="userDao" />│   │<bean id="userService" >
848.     <property name="userDao" ref="userDao"/>
849. </bean>
850. <bean id="userDao" />   │   └── ClassService.java<bean id="userService" >
851.     <property name="userDao" ref="userDao"/>
852. </bean>
853. <bean id="userDao" />│   │<bean id="userService" >
854.     <property name="userDao" ref="userDao"/>
855. </bean>
856. <bean id="userDao" />   ├── dao/<bean id="userService" >
857.     <property name="userDao" ref="userDao"/>
858. </bean>
859. <bean id="userDao" /><bean id="userService" >
860.     <property name="userDao" ref="userDao"/>
861. </bean>
862. <bean id="userDao" /><bean id="userService" >
863.     <property name="userDao" ref="userDao"/>
864. </bean>
865. <bean id="userDao" /><bean id="userService" >
866.     <property name="userDao" ref="userDao"/>
867. </bean>
868. <bean id="userDao" /><bean id="userService" >
869.     <property name="userDao" ref="userDao"/>
870. </bean>
871. <bean id="userDao" /><bean id="userService" >
872.     <property name="userDao" ref="userDao"/>
873. </bean>
874. <bean id="userDao" /># 数据访问层<bean id="userService" >
875.     <property name="userDao" ref="userDao"/>
876. </bean>
877. <bean id="userDao" />│   │<bean id="userService" >
878.     <property name="userDao" ref="userDao"/>
879. </bean>
880. <bean id="userDao" />   │   ├── UserDao.java<bean id="userService" >
881.     <property name="userDao" ref="userDao"/>
882. </bean>
883. <bean id="userDao" /><bean id="userService" >
884.     <property name="userDao" ref="userDao"/>
885. </bean>
886. <bean id="userDao" />   # JdbcTemplate CRUD<bean id="userService" >
887.     <property name="userDao" ref="userDao"/>
888. </bean>
889. <bean id="userDao" />│   │<bean id="userService" >
890.     <property name="userDao" ref="userDao"/>
891. </bean>
892. <bean id="userDao" />   │   ├── StudentDao.java<bean id="userService" >
893.     <property name="userDao" ref="userDao"/>
894. </bean>
895. <bean id="userDao" />│   │<bean id="userService" >
896.     <property name="userDao" ref="userDao"/>
897. </bean>
898. <bean id="userDao" />   │   └── ClassDao.java<bean id="userService" >
899.     <property name="userDao" ref="userDao"/>
900. </bean>
901. <bean id="userDao" />│   │<bean id="userService" >
902.     <property name="userDao" ref="userDao"/>
903. </bean>
904. <bean id="userDao" />   ├── model/<bean id="userService" >
905.     <property name="userDao" ref="userDao"/>
906. </bean>
907. <bean id="userDao" /><bean id="userService" >
908.     <property name="userDao" ref="userDao"/>
909. </bean>
910. <bean id="userDao" /><bean id="userService" >
911.     <property name="userDao" ref="userDao"/>
912. </bean>
913. <bean id="userDao" /><bean id="userService" >
914.     <property name="userDao" ref="userDao"/>
915. </bean>
916. <bean id="userDao" /><bean id="userService" >
917.     <property name="userDao" ref="userDao"/>
918. </bean>
919. <bean id="userDao" />  # 数据模型<bean id="userService" >
920.     <property name="userDao" ref="userDao"/>
921. </bean>
922. <bean id="userDao" />│   │<bean id="userService" >
923.     <property name="userDao" ref="userDao"/>
924. </bean>
925. <bean id="userDao" />   │   ├── User.java<bean id="userService" >
926.     <property name="userDao" ref="userDao"/>
927. </bean>
928. <bean id="userDao" />│   │<bean id="userService" >
929.     <property name="userDao" ref="userDao"/>
930. </bean>
931. <bean id="userDao" />   │   ├── Student.java<bean id="userService" >
932.     <property name="userDao" ref="userDao"/>
933. </bean>
934. <bean id="userDao" />│   │<bean id="userService" >
935.     <property name="userDao" ref="userDao"/>
936. </bean>
937. <bean id="userDao" />   │   └── ClassInfo.java<bean id="userService" >
938.     <property name="userDao" ref="userDao"/>
939. </bean>
940. <bean id="userDao" />│   │<bean id="userService" >
941.     <property name="userDao" ref="userDao"/>
942. </bean>
943. <bean id="userDao" />   └── utils/<bean id="userService" >
944.     <property name="userDao" ref="userDao"/>
945. </bean>
946. <bean id="userDao" /><bean id="userService" >
947.     <property name="userDao" ref="userDao"/>
948. </bean>
949. <bean id="userDao" /><bean id="userService" >
950.     <property name="userDao" ref="userDao"/>
951. </bean>
952. <bean id="userDao" /><bean id="userService" >
953.     <property name="userDao" ref="userDao"/>
954. </bean>
955. <bean id="userDao" /><bean id="userService" >
956.     <property name="userDao" ref="userDao"/>
957. </bean>
958. <bean id="userDao" />  # 工具类<bean id="userService" >
959.     <property name="userDao" ref="userDao"/>
960. </bean>
961. <bean id="userDao" />│   │<bean id="userService" >
962.     <property name="userDao" ref="userDao"/>
963. </bean>
964. <bean id="userDao" /><bean id="userService" >
965.     <property name="userDao" ref="userDao"/>
966. </bean>
967. <bean id="userDao" />   ├── ApiResponse.java<bean id="userService" >
968.     <property name="userDao" ref="userDao"/>
969. </bean>
970. <bean id="userDao" /><bean id="userService" >
971.     <property name="userDao" ref="userDao"/>
972. </bean>
973. <bean id="userDao" /># API响应封装<bean id="userService" >
974.     <property name="userDao" ref="userDao"/>
975. </bean>
976. <bean id="userDao" />│   │<bean id="userService" >
977.     <property name="userDao" ref="userDao"/>
978. </bean>
979. <bean id="userDao" /><bean id="userService" >
980.     <property name="userDao" ref="userDao"/>
981. </bean>
982. <bean id="userDao" />   ├── PageResult.java<bean id="userService" >
983.     <property name="userDao" ref="userDao"/>
984. </bean>
985. <bean id="userDao" /><bean id="userService" >
986.     <property name="userDao" ref="userDao"/>
987. </bean>
988. <bean id="userDao" /> # 分页结果<bean id="userService" >
989.     <property name="userDao" ref="userDao"/>
990. </bean>
991. <bean id="userDao" />│   │<bean id="userService" >
992.     <property name="userDao" ref="userDao"/>
993. </bean>
994. <bean id="userDao" /><bean id="userService" >
995.     <property name="userDao" ref="userDao"/>
996. </bean>
997. <bean id="userDao" />   └── JsonUtil.java<bean id="userService" >
998.     <property name="userDao" ref="userDao"/>
999. </bean>
1000. <bean id="userDao" />│   ├── init-db.sql<bean id="userService" >
1001.     <property name="userDao" ref="userDao"/>
1002. </bean>
1003. <bean id="userDao" /><bean id="userService" >
1004.     <property name="userDao" ref="userDao"/>
1005. </bean>
1006. <bean id="userDao" /><bean id="userService" >
1007.     <property name="userDao" ref="userDao"/>
1008. </bean>
1009. <bean id="userDao" /><bean id="userService" >
1010.     <property name="userDao" ref="userDao"/>
1011. </bean>
1012. <bean id="userDao" /><bean id="userService" >
1013.     <property name="userDao" ref="userDao"/>
1014. </bean>
1015. <bean id="userDao" /><bean id="userService" >
1016.     <property name="userDao" ref="userDao"/>
1017. </bean>
1018. <bean id="userDao" /> # 数据库初始化脚本<bean id="userService" >
1019.     <property name="userDao" ref="userDao"/>
1020. </bean>
1021. <bean id="userDao" />│   └── test-user-api.sh<bean id="userService" >
1022.     <property name="userDao" ref="userDao"/>
1023. </bean>
1024. <bean id="userDao" /><bean id="userService" >
1025.     <property name="userDao" ref="userDao"/>
1026. </bean>
1027. <bean id="userDao" /><bean id="userService" >
1028.     <property name="userDao" ref="userDao"/>
1029. </bean>
1030. <bean id="userDao" /><bean id="userService" >
1031.     <property name="userDao" ref="userDao"/>
1032. </bean>
1033. <bean id="userDao" /><bean id="userService" >
1034.     <property name="userDao" ref="userDao"/>
1035. </bean>
1036. <bean id="userDao" /># API测试脚本<bean id="userService" >
1037.     <property name="userDao" ref="userDao"/>
1038. </bean>
1039. <bean id="userDao" />│<bean id="userService" >
1040.     <property name="userDao" ref="userDao"/>
1041. </bean>
1042. <bean id="userDao" />└── web-demo/<bean id="userService" >
1043.     <property name="userDao" ref="userDao"/>
1044. </bean>
1045. <bean id="userDao" /><bean id="userService" >
1046.     <property name="userDao" ref="userDao"/>
1047. </bean>
1048. <bean id="userDao" /><bean id="userService" >
1049.     <property name="userDao" ref="userDao"/>
1050. </bean>
1051. <bean id="userDao" /><bean id="userService" >
1052.     <property name="userDao" ref="userDao"/>
1053. </bean>
1054. <bean id="userDao" /><bean id="userService" >
1055.     <property name="userDao" ref="userDao"/>
1056. </bean>
1057. <bean id="userDao" /><bean id="userService" >
1058.     <property name="userDao" ref="userDao"/>
1059. </bean>
1060. <bean id="userDao" /><bean id="userService" >
1061.     <property name="userDao" ref="userDao"/>
1062. </bean>
1063. <bean id="userDao" /><bean id="userService" >
1064.     <property name="userDao" ref="userDao"/>
1065. </bean>
1066. <bean id="userDao" /># Web应用示例<bean id="userService" >
1067.     <property name="userDao" ref="userDao"/>
1068. </bean>
1069. <bean id="userDao" /><bean id="userService" >
1070.     <property name="userDao" ref="userDao"/>
1071. </bean>
1072. <bean id="userDao" />├── src/<bean id="userService" >
1073.     <property name="userDao" ref="userDao"/>
1074. </bean>
1075. <bean id="userDao" /><bean id="userService" >
1076.     <property name="userDao" ref="userDao"/>
1077. </bean>
1078. <bean id="userDao" />│   └── main/java/com/github/microwind/webdemo/<bean id="userService" >
1079.     <property name="userDao" ref="userDao"/>
1080. </bean>
1081. <bean id="userDao" /><bean id="userService" >
1082.     <property name="userDao" ref="userDao"/>
1083. </bean>
1084. <bean id="userDao" />│<bean id="userService" >
1085.     <property name="userDao" ref="userDao"/>
1086. </bean>
1087. <bean id="userDao" />   ├── WebDemoApplication.java<bean id="userService" >
1088.     <property name="userDao" ref="userDao"/>
1089. </bean>
1090. <bean id="userDao" /> # 启动类<bean id="userService" >
1091.     <property name="userDao" ref="userDao"/>
1092. </bean>
1093. <bean id="userDao" /><bean id="userService" >
1094.     <property name="userDao" ref="userDao"/>
1095. </bean>
1096. <bean id="userDao" />│<bean id="userService" >
1097.     <property name="userDao" ref="userDao"/>
1098. </bean>
1099. <bean id="userDao" />   ├── controller/<bean id="userService" >
1100.     <property name="userDao" ref="userDao"/>
1101. </bean>
1102. <bean id="userDao" /><bean id="userService" >
1103.     <property name="userDao" ref="userDao"/>
1104. </bean>
1105. <bean id="userDao" /><bean id="userService" >
1106.     <property name="userDao" ref="userDao"/>
1107. </bean>
1108. <bean id="userDao" /><bean id="userService" >
1109.     <property name="userDao" ref="userDao"/>
1110. </bean>
1111. <bean id="userDao" /> # 控制器层<bean id="userService" >
1112.     <property name="userDao" ref="userDao"/>
1113. </bean>
1114. <bean id="userDao" /><bean id="userService" >
1115.     <property name="userDao" ref="userDao"/>
1116. </bean>
1117. <bean id="userDao" />│<bean id="userService" >
1118.     <property name="userDao" ref="userDao"/>
1119. </bean>
1120. <bean id="userDao" />   │   ├── HomeController.java<bean id="userService" >
1121.     <property name="userDao" ref="userDao"/>
1122. </bean>
1123. <bean id="userDao" /> # 首页<bean id="userService" >
1124.     <property name="userDao" ref="userDao"/>
1125. </bean>
1126. <bean id="userDao" /><bean id="userService" >
1127.     <property name="userDao" ref="userDao"/>
1128. </bean>
1129. <bean id="userDao" />│<bean id="userService" >
1130.     <property name="userDao" ref="userDao"/>
1131. </bean>
1132. <bean id="userDao" />   │   ├── ProductController.java  # 产品中心<bean id="userService" >
1133.     <property name="userDao" ref="userDao"/>
1134. </bean>
1135. <bean id="userDao" /><bean id="userService" >
1136.     <property name="userDao" ref="userDao"/>
1137. </bean>
1138. <bean id="userDao" />│<bean id="userService" >
1139.     <property name="userDao" ref="userDao"/>
1140. </bean>
1141. <bean id="userDao" />   │   ├── NewsController.java<bean id="userService" >
1142.     <property name="userDao" ref="userDao"/>
1143. </bean>
1144. <bean id="userDao" /> # 新闻资讯<bean id="userService" >
1145.     <property name="userDao" ref="userDao"/>
1146. </bean>
1147. <bean id="userDao" /><bean id="userService" >
1148.     <property name="userDao" ref="userDao"/>
1149. </bean>
1150. <bean id="userDao" />│<bean id="userService" >
1151.     <property name="userDao" ref="userDao"/>
1152. </bean>
1153. <bean id="userDao" />   │   ├── AdminController.java<bean id="userService" >
1154.     <property name="userDao" ref="userDao"/>
1155. </bean>
1156. <bean id="userDao" /># 后台管理<bean id="userService" >
1157.     <property name="userDao" ref="userDao"/>
1158. </bean>
1159. <bean id="userDao" /><bean id="userService" >
1160.     <property name="userDao" ref="userDao"/>
1161. </bean>
1162. <bean id="userDao" />│<bean id="userService" >
1163.     <property name="userDao" ref="userDao"/>
1164. </bean>
1165. <bean id="userDao" />   │   └── ArticleController.java  # 文章CRUD<bean id="userService" >
1166.     <property name="userDao" ref="userDao"/>
1167. </bean>
1168. <bean id="userDao" /><bean id="userService" >
1169.     <property name="userDao" ref="userDao"/>
1170. </bean>
1171. <bean id="userDao" />│<bean id="userService" >
1172.     <property name="userDao" ref="userDao"/>
1173. </bean>
1174. <bean id="userDao" />   ├── service/<bean id="userService" >
1175.     <property name="userDao" ref="userDao"/>
1176. </bean>
1177. <bean id="userDao" /><bean id="userService" >
1178.     <property name="userDao" ref="userDao"/>
1179. </bean>
1180. <bean id="userDao" /><bean id="userService" >
1181.     <property name="userDao" ref="userDao"/>
1182. </bean>
1183. <bean id="userDao" /><bean id="userService" >
1184.     <property name="userDao" ref="userDao"/>
1185. </bean>
1186. <bean id="userDao" /><bean id="userService" >
1187.     <property name="userDao" ref="userDao"/>
1188. </bean>
1189. <bean id="userDao" /># 服务层<bean id="userService" >
1190.     <property name="userDao" ref="userDao"/>
1191. </bean>
1192. <bean id="userDao" /><bean id="userService" >
1193.     <property name="userDao" ref="userDao"/>
1194. </bean>
1195. <bean id="userDao" />│<bean id="userService" >
1196.     <property name="userDao" ref="userDao"/>
1197. </bean>
1198. <bean id="userDao" />   │   ├── ColumnService.java<bean id="userService" >
1199.     <property name="userDao" ref="userDao"/>
1200. </bean>
1201. <bean id="userDao" /><bean id="userService" >
1202.     <property name="userDao" ref="userDao"/>
1203. </bean>
1204. <bean id="userDao" />│<bean id="userService" >
1205.     <property name="userDao" ref="userDao"/>
1206. </bean>
1207. <bean id="userDao" />   │   └── ArticleService.java<bean id="userService" >
1208.     <property name="userDao" ref="userDao"/>
1209. </bean>
1210. <bean id="userDao" /><bean id="userService" >
1211.     <property name="userDao" ref="userDao"/>
1212. </bean>
1213. <bean id="userDao" />│<bean id="userService" >
1214.     <property name="userDao" ref="userDao"/>
1215. </bean>
1216. <bean id="userDao" />   ├── dao/<bean id="userService" >
1217.     <property name="userDao" ref="userDao"/>
1218. </bean>
1219. <bean id="userDao" /><bean id="userService" >
1220.     <property name="userDao" ref="userDao"/>
1221. </bean>
1222. <bean id="userDao" /><bean id="userService" >
1223.     <property name="userDao" ref="userDao"/>
1224. </bean>
1225. <bean id="userDao" /><bean id="userService" >
1226.     <property name="userDao" ref="userDao"/>
1227. </bean>
1228. <bean id="userDao" /><bean id="userService" >
1229.     <property name="userDao" ref="userDao"/>
1230. </bean>
1231. <bean id="userDao" /><bean id="userService" >
1232.     <property name="userDao" ref="userDao"/>
1233. </bean>
1234. <bean id="userDao" /># 数据访问层<bean id="userService" >
1235.     <property name="userDao" ref="userDao"/>
1236. </bean>
1237. <bean id="userDao" /><bean id="userService" >
1238.     <property name="userDao" ref="userDao"/>
1239. </bean>
1240. <bean id="userDao" />│<bean id="userService" >
1241.     <property name="userDao" ref="userDao"/>
1242. </bean>
1243. <bean id="userDao" />   │   ├── ColumnDao.java<bean id="userService" >
1244.     <property name="userDao" ref="userDao"/>
1245. </bean>
1246. <bean id="userDao" /><bean id="userService" >
1247.     <property name="userDao" ref="userDao"/>
1248. </bean>
1249. <bean id="userDao" />│<bean id="userService" >
1250.     <property name="userDao" ref="userDao"/>
1251. </bean>
1252. <bean id="userDao" />   │   └── ArticleDao.java<bean id="userService" >
1253.     <property name="userDao" ref="userDao"/>
1254. </bean>
1255. <bean id="userDao" /><bean id="userService" >
1256.     <property name="userDao" ref="userDao"/>
1257. </bean>
1258. <bean id="userDao" />│<bean id="userService" >
1259.     <property name="userDao" ref="userDao"/>
1260. </bean>
1261. <bean id="userDao" />   ├── model/<bean id="userService" >
1262.     <property name="userDao" ref="userDao"/>
1263. </bean>
1264. <bean id="userDao" /><bean id="userService" >
1265.     <property name="userDao" ref="userDao"/>
1266. </bean>
1267. <bean id="userDao" /><bean id="userService" >
1268.     <property name="userDao" ref="userDao"/>
1269. </bean>
1270. <bean id="userDao" /><bean id="userService" >
1271.     <property name="userDao" ref="userDao"/>
1272. </bean>
1273. <bean id="userDao" /><bean id="userService" >
1274.     <property name="userDao" ref="userDao"/>
1275. </bean>
1276. <bean id="userDao" />  # 数据模型<bean id="userService" >
1277.     <property name="userDao" ref="userDao"/>
1278. </bean>
1279. <bean id="userDao" /><bean id="userService" >
1280.     <property name="userDao" ref="userDao"/>
1281. </bean>
1282. <bean id="userDao" />│<bean id="userService" >
1283.     <property name="userDao" ref="userDao"/>
1284. </bean>
1285. <bean id="userDao" />   │   ├── Column.java<bean id="userService" >
1286.     <property name="userDao" ref="userDao"/>
1287. </bean>
1288. <bean id="userDao" /><bean id="userService" >
1289.     <property name="userDao" ref="userDao"/>
1290. </bean>
1291. <bean id="userDao" /><bean id="userService" >
1292.     <property name="userDao" ref="userDao"/>
1293. </bean>
1294. <bean id="userDao" /> # 栏目<bean id="userService" >
1295.     <property name="userDao" ref="userDao"/>
1296. </bean>
1297. <bean id="userDao" /><bean id="userService" >
1298.     <property name="userDao" ref="userDao"/>
1299. </bean>
1300. <bean id="userDao" />│<bean id="userService" >
1301.     <property name="userDao" ref="userDao"/>
1302. </bean>
1303. <bean id="userDao" />   │   └── Article.java<bean id="userService" >
1304.     <property name="userDao" ref="userDao"/>
1305. </bean>
1306. <bean id="userDao" /><bean id="userService" >
1307.     <property name="userDao" ref="userDao"/>
1308. </bean>
1309. <bean id="userDao" /><bean id="userService" >
1310.     <property name="userDao" ref="userDao"/>
1311. </bean>
1312. <bean id="userDao" /># 文章<bean id="userService" >
1313.     <property name="userDao" ref="userDao"/>
1314. </bean>
1315. <bean id="userDao" /><bean id="userService" >
1316.     <property name="userDao" ref="userDao"/>
1317. </bean>
1318. <bean id="userDao" />│<bean id="userService" >
1319.     <property name="userDao" ref="userDao"/>
1320. </bean>
1321. <bean id="userDao" />   └── utils/<bean id="userService" >
1322.     <property name="userDao" ref="userDao"/>
1323. </bean>
1324. <bean id="userDao" /><bean id="userService" >
1325.     <property name="userDao" ref="userDao"/>
1326. </bean>
1327. <bean id="userDao" /><bean id="userService" >
1328.     <property name="userDao" ref="userDao"/>
1329. </bean>
1330. <bean id="userDao" /><bean id="userService" >
1331.     <property name="userDao" ref="userDao"/>
1332. </bean>
1333. <bean id="userDao" /><bean id="userService" >
1334.     <property name="userDao" ref="userDao"/>
1335. </bean>
1336. <bean id="userDao" />  # 工具类<bean id="userService" >
1337.     <property name="userDao" ref="userDao"/>
1338. </bean>
1339. <bean id="userDao" /><bean id="userService" >
1340.     <property name="userDao" ref="userDao"/>
1341. </bean>
1342. <bean id="userDao" />│<bean id="userService" >
1343.     <property name="userDao" ref="userDao"/>
1344. </bean>
1345. <bean id="userDao" /><bean id="userService" >
1346.     <property name="userDao" ref="userDao"/>
1347. </bean>
1348. <bean id="userDao" />   ├── ResponseUtils.java<bean id="userService" >
1349.     <property name="userDao" ref="userDao"/>
1350. </bean>
1351. <bean id="userDao" /><bean id="userService" >
1352.     <property name="userDao" ref="userDao"/>
1353. </bean>
1354. <bean id="userDao" />│<bean id="userService" >
1355.     <property name="userDao" ref="userDao"/>
1356. </bean>
1357. <bean id="userDao" /><bean id="userService" >
1358.     <property name="userDao" ref="userDao"/>
1359. </bean>
1360. <bean id="userDao" />   ├── RequestUtils.java<bean id="userService" >
1361.     <property name="userDao" ref="userDao"/>
1362. </bean>
1363. <bean id="userDao" /><bean id="userService" >
1364.     <property name="userDao" ref="userDao"/>
1365. </bean>
1366. <bean id="userDao" />│<bean id="userService" >
1367.     <property name="userDao" ref="userDao"/>
1368. </bean>
1369. <bean id="userDao" /><bean id="userService" >
1370.     <property name="userDao" ref="userDao"/>
1371. </bean>
1372. <bean id="userDao" />   └── ResponseBody.java<bean id="userService" >
1373.     <property name="userDao" ref="userDao"/>
1374. </bean>
1375. <bean id="userDao" /><bean id="userService" >
1376.     <property name="userDao" ref="userDao"/>
1377. </bean>
1378. <bean id="userDao" />└── README.md

复制代码

核心模块说明：
模块包名核心类行数说明注解annotation20个注解类~350定义框架的注解体系IoC容器coreSpringWindApplicationContext~730容器核心，Bean管理，三级缓存AOPaopAspectProcessor~150切面处理，动态代理创建Web MVCwebDispatcherServlet~660请求分发，参数绑定，视图解析JDBCjdbcJdbcTemplate~260数据库操作模板，结果映射异常exception4个异常类~110框架异常定义工具utilClassScanner、StringUtils~420类扫描、字符串处理整个框架核心代码约 3800 行，但实现了Spring的核心功能，代码精简而功能完整。
Springwind使用实践

光说不练假把式，下面我们通过两个实际示例来看看SpringWind怎么用。
示例1：User Demo - 完整的用户管理系统

这是一个基于数据库的用户管理系统，展示了SpringWind的IoC、DI、Web MVC和JDBC功能。请从examples里面找到user-demo目录。
项目结构

典型的三层架构：Controller → Service → Dao

1. user-demo/├── controller/│   └── UserController.java<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />  # 处理HTTP请求├── service/│   └── UserService.java<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />  # 业务逻辑├── dao/│   └── UserDao.java<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />  # 数据访问（使用JdbcTemplate）├── model/│   └── User.java<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /> # 实体类├── config/│   └── DataSourceConfig.java<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /># 数据源配置└── utils/<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />├── ApiResponse.java<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />  # 统一响应封装<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />└── PageResult.java<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />   # 分页结果

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1. 定义实体类

1. public class User {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />private Long id;<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private String name;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />private String email;<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />private String phone;<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />private Long createdTime;<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />private Long updatedTime;<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />// getter/setter省略}

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2. 数据访问层 - 使用JdbcTemplate

1. @Repositorypublic class UserDao {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Autowired<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private JdbcTemplate jdbcTemplate;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />// 查询所有用户<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />public List findAll() {<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />return jdbcTemplate.query(<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />"SELECT * FROM users ORDER BY id DESC",<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />this::mapRow<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />);<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />}<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />// 根据ID查询<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />public User findById(Long id) {<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />return jdbcTemplate.queryForObject(<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" /><bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />"SELECT * FROM users WHERE id = ?",<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />this::mapRow,<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /><bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />id<bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" /><bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" />);<bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" />}<bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" />// 分页查询<bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" />public List findByPage(int page, int pageSize) {<bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" /><bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" />int offset = (page - 1) * pageSize;<bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" /><bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" />return jdbcTemplate.query(<bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" /><bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" /><bean id="userService" >
119.     <property name="userDao" ref="userDao"/>
120. </bean>
121. <bean id="userDao" />"SELECT * FROM users ORDER BY id DESC LIMIT ? OFFSET ?",<bean id="userService" >
122.     <property name="userDao" ref="userDao"/>
123. </bean>
124. <bean id="userDao" /><bean id="userService" >
125.     <property name="userDao" ref="userDao"/>
126. </bean>
127. <bean id="userDao" /><bean id="userService" >
128.     <property name="userDao" ref="userDao"/>
129. </bean>
130. <bean id="userDao" />this::mapRow,<bean id="userService" >
131.     <property name="userDao" ref="userDao"/>
132. </bean>
133. <bean id="userDao" /><bean id="userService" >
134.     <property name="userDao" ref="userDao"/>
135. </bean>
136. <bean id="userDao" /><bean id="userService" >
137.     <property name="userDao" ref="userDao"/>
138. </bean>
139. <bean id="userDao" />pageSize, offset<bean id="userService" >
140.     <property name="userDao" ref="userDao"/>
141. </bean>
142. <bean id="userDao" /><bean id="userService" >
143.     <property name="userDao" ref="userDao"/>
144. </bean>
145. <bean id="userDao" />);<bean id="userService" >
146.     <property name="userDao" ref="userDao"/>
147. </bean>
148. <bean id="userDao" />}<bean id="userService" >
149.     <property name="userDao" ref="userDao"/>
150. </bean>
151. <bean id="userDao" />// 创建用户<bean id="userService" >
152.     <property name="userDao" ref="userDao"/>
153. </bean>
154. <bean id="userDao" />public int insert(User user) {<bean id="userService" >
155.     <property name="userDao" ref="userDao"/>
156. </bean>
157. <bean id="userDao" /><bean id="userService" >
158.     <property name="userDao" ref="userDao"/>
159. </bean>
160. <bean id="userDao" />return jdbcTemplate.update(<bean id="userService" >
161.     <property name="userDao" ref="userDao"/>
162. </bean>
163. <bean id="userDao" /><bean id="userService" >
164.     <property name="userDao" ref="userDao"/>
165. </bean>
166. <bean id="userDao" /><bean id="userService" >
167.     <property name="userDao" ref="userDao"/>
168. </bean>
169. <bean id="userDao" />"INSERT INTO users (name, email, phone, created_time, updated_time) " +<bean id="userService" >
170.     <property name="userDao" ref="userDao"/>
171. </bean>
172. <bean id="userDao" /><bean id="userService" >
173.     <property name="userDao" ref="userDao"/>
174. </bean>
175. <bean id="userDao" /><bean id="userService" >
176.     <property name="userDao" ref="userDao"/>
177. </bean>
178. <bean id="userDao" />"VALUES (?, ?, ?, ?, ?)",<bean id="userService" >
179.     <property name="userDao" ref="userDao"/>
180. </bean>
181. <bean id="userDao" /><bean id="userService" >
182.     <property name="userDao" ref="userDao"/>
183. </bean>
184. <bean id="userDao" /><bean id="userService" >
185.     <property name="userDao" ref="userDao"/>
186. </bean>
187. <bean id="userDao" />user.getName(), user.getEmail(), user.getPhone(),<bean id="userService" >
188.     <property name="userDao" ref="userDao"/>
189. </bean>
190. <bean id="userDao" /><bean id="userService" >
191.     <property name="userDao" ref="userDao"/>
192. </bean>
193. <bean id="userDao" /><bean id="userService" >
194.     <property name="userDao" ref="userDao"/>
195. </bean>
196. <bean id="userDao" />System.currentTimeMillis(), System.currentTimeMillis()<bean id="userService" >
197.     <property name="userDao" ref="userDao"/>
198. </bean>
199. <bean id="userDao" /><bean id="userService" >
200.     <property name="userDao" ref="userDao"/>
201. </bean>
202. <bean id="userDao" />);<bean id="userService" >
203.     <property name="userDao" ref="userDao"/>
204. </bean>
205. <bean id="userDao" />}<bean id="userService" >
206.     <property name="userDao" ref="userDao"/>
207. </bean>
208. <bean id="userDao" />// 更新用户<bean id="userService" >
209.     <property name="userDao" ref="userDao"/>
210. </bean>
211. <bean id="userDao" />public int update(User user) {<bean id="userService" >
212.     <property name="userDao" ref="userDao"/>
213. </bean>
214. <bean id="userDao" /><bean id="userService" >
215.     <property name="userDao" ref="userDao"/>
216. </bean>
217. <bean id="userDao" />return jdbcTemplate.update(<bean id="userService" >
218.     <property name="userDao" ref="userDao"/>
219. </bean>
220. <bean id="userDao" /><bean id="userService" >
221.     <property name="userDao" ref="userDao"/>
222. </bean>
223. <bean id="userDao" /><bean id="userService" >
224.     <property name="userDao" ref="userDao"/>
225. </bean>
226. <bean id="userDao" />"UPDATE users SET name = ?, email = ?, phone = ?, " +<bean id="userService" >
227.     <property name="userDao" ref="userDao"/>
228. </bean>
229. <bean id="userDao" /><bean id="userService" >
230.     <property name="userDao" ref="userDao"/>
231. </bean>
232. <bean id="userDao" /><bean id="userService" >
233.     <property name="userDao" ref="userDao"/>
234. </bean>
235. <bean id="userDao" />"updated_time = ? WHERE id = ?",<bean id="userService" >
236.     <property name="userDao" ref="userDao"/>
237. </bean>
238. <bean id="userDao" /><bean id="userService" >
239.     <property name="userDao" ref="userDao"/>
240. </bean>
241. <bean id="userDao" /><bean id="userService" >
242.     <property name="userDao" ref="userDao"/>
243. </bean>
244. <bean id="userDao" />user.getName(), user.getEmail(), user.getPhone(),<bean id="userService" >
245.     <property name="userDao" ref="userDao"/>
246. </bean>
247. <bean id="userDao" /><bean id="userService" >
248.     <property name="userDao" ref="userDao"/>
249. </bean>
250. <bean id="userDao" /><bean id="userService" >
251.     <property name="userDao" ref="userDao"/>
252. </bean>
253. <bean id="userDao" />System.currentTimeMillis(), user.getId()<bean id="userService" >
254.     <property name="userDao" ref="userDao"/>
255. </bean>
256. <bean id="userDao" /><bean id="userService" >
257.     <property name="userDao" ref="userDao"/>
258. </bean>
259. <bean id="userDao" />);<bean id="userService" >
260.     <property name="userDao" ref="userDao"/>
261. </bean>
262. <bean id="userDao" />}<bean id="userService" >
263.     <property name="userDao" ref="userDao"/>
264. </bean>
265. <bean id="userDao" />// 删除用户<bean id="userService" >
266.     <property name="userDao" ref="userDao"/>
267. </bean>
268. <bean id="userDao" />public int delete(Long id) {<bean id="userService" >
269.     <property name="userDao" ref="userDao"/>
270. </bean>
271. <bean id="userDao" /><bean id="userService" >
272.     <property name="userDao" ref="userDao"/>
273. </bean>
274. <bean id="userDao" />return jdbcTemplate.update("DELETE FROM users WHERE id = ?", id);<bean id="userService" >
275.     <property name="userDao" ref="userDao"/>
276. </bean>
277. <bean id="userDao" />}<bean id="userService" >
278.     <property name="userDao" ref="userDao"/>
279. </bean>
280. <bean id="userDao" />// 结果集映射<bean id="userService" >
281.     <property name="userDao" ref="userDao"/>
282. </bean>
283. <bean id="userDao" />private User mapRow(ResultSet rs, int rowNum) throws SQLException {<bean id="userService" >
284.     <property name="userDao" ref="userDao"/>
285. </bean>
286. <bean id="userDao" /><bean id="userService" >
287.     <property name="userDao" ref="userDao"/>
288. </bean>
289. <bean id="userDao" />User user = new User();<bean id="userService" >
290.     <property name="userDao" ref="userDao"/>
291. </bean>
292. <bean id="userDao" /><bean id="userService" >
293.     <property name="userDao" ref="userDao"/>
294. </bean>
295. <bean id="userDao" />user.setId(rs.getLong("id"));<bean id="userService" >
296.     <property name="userDao" ref="userDao"/>
297. </bean>
298. <bean id="userDao" /><bean id="userService" >
299.     <property name="userDao" ref="userDao"/>
300. </bean>
301. <bean id="userDao" />user.setName(rs.getString("name"));<bean id="userService" >
302.     <property name="userDao" ref="userDao"/>
303. </bean>
304. <bean id="userDao" /><bean id="userService" >
305.     <property name="userDao" ref="userDao"/>
306. </bean>
307. <bean id="userDao" />user.setEmail(rs.getString("email"));<bean id="userService" >
308.     <property name="userDao" ref="userDao"/>
309. </bean>
310. <bean id="userDao" /><bean id="userService" >
311.     <property name="userDao" ref="userDao"/>
312. </bean>
313. <bean id="userDao" />user.setPhone(rs.getString("phone"));<bean id="userService" >
314.     <property name="userDao" ref="userDao"/>
315. </bean>
316. <bean id="userDao" /><bean id="userService" >
317.     <property name="userDao" ref="userDao"/>
318. </bean>
319. <bean id="userDao" />user.setCreatedTime(rs.getLong("created_time"));<bean id="userService" >
320.     <property name="userDao" ref="userDao"/>
321. </bean>
322. <bean id="userDao" /><bean id="userService" >
323.     <property name="userDao" ref="userDao"/>
324. </bean>
325. <bean id="userDao" />user.setUpdatedTime(rs.getLong("updated_time"));<bean id="userService" >
326.     <property name="userDao" ref="userDao"/>
327. </bean>
328. <bean id="userDao" /><bean id="userService" >
329.     <property name="userDao" ref="userDao"/>
330. </bean>
331. <bean id="userDao" />return user;<bean id="userService" >
332.     <property name="userDao" ref="userDao"/>
333. </bean>
334. <bean id="userDao" />}}

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看到了吗？ 原本50多行的JDBC代码，现在只需要2行。JdbcTemplate自动处理了连接管理、资源关闭、异常处理。
3. 服务层 - 业务逻辑

1. @Servicepublic class UserService {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Autowired<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private UserDao userDao;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />public List getAllUsers() {<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />return userDao.findAll();<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />}<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />public User getUserById(Long id) {<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />return userDao.findById(id);<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />}<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />public List getUsersByPage(int page, int pageSize) {<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />return userDao.findByPage(page, pageSize);<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />}<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />public Long getUserCount() {<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />return userDao.count();<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" />}<bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />public boolean createUser(User user) {<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />return userDao.insert(user) > 0;<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />}<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" />public boolean updateUser(User user) {<bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />return userDao.update(user) > 0;<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" />}<bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" />public boolean deleteUser(Long id) {<bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" /><bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" />return userDao.delete(id) > 0;<bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" />}}

复制代码

服务层很薄，主要是调用Dao层。如果有复杂的业务逻辑（比如用户注册需要发送邮件），就写在这里。
4. 控制器层 - RESTful API

1. @Controller@RequestMapping("/user")public class UserController {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Autowired<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private UserService userService;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />// 获取用户列表（支持分页）<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />@RequestMapping("/list")<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />@ResponseBody<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />public ViewResult list(HttpServletRequest request) {<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />try {<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />String pageStr = request.getParameter("page");<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />String pageSizeStr = request.getParameter("pageSize");<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />if (pageStr != null && pageSizeStr != null) {<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" /><bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />// 分页查询<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" /><bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />int page = Integer.parseInt(pageStr);<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /><bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" /><bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" />int pageSize = Integer.parseInt(pageSizeStr);<bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" /><bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" /><bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" /><bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" />List users = userService.getUsersByPage(page, pageSize);<bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" /><bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" /><bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" /><bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" />Long total = userService.getUserCount();<bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" /><bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" /><bean id="userService" >
119.     <property name="userDao" ref="userDao"/>
120. </bean>
121. <bean id="userDao" /><bean id="userService" >
122.     <property name="userDao" ref="userDao"/>
123. </bean>
124. <bean id="userDao" />// 使用PageResult和ApiResponse简化响应构建<bean id="userService" >
125.     <property name="userDao" ref="userDao"/>
126. </bean>
127. <bean id="userDao" /><bean id="userService" >
128.     <property name="userDao" ref="userDao"/>
129. </bean>
130. <bean id="userDao" /><bean id="userService" >
131.     <property name="userDao" ref="userDao"/>
132. </bean>
133. <bean id="userDao" /><bean id="userService" >
134.     <property name="userDao" ref="userDao"/>
135. </bean>
136. <bean id="userDao" />return new JsonResult(<bean id="userService" >
137.     <property name="userDao" ref="userDao"/>
138. </bean>
139. <bean id="userDao" /><bean id="userService" >
140.     <property name="userDao" ref="userDao"/>
141. </bean>
142. <bean id="userDao" /><bean id="userService" >
143.     <property name="userDao" ref="userDao"/>
144. </bean>
145. <bean id="userDao" /><bean id="userService" >
146.     <property name="userDao" ref="userDao"/>
147. </bean>
148. <bean id="userDao" /><bean id="userService" >
149.     <property name="userDao" ref="userDao"/>
150. </bean>
151. <bean id="userDao" />ApiResponse.page(users, page, pageSize, total).toMap()<bean id="userService" >
152.     <property name="userDao" ref="userDao"/>
153. </bean>
154. <bean id="userDao" /><bean id="userService" >
155.     <property name="userDao" ref="userDao"/>
156. </bean>
157. <bean id="userDao" /><bean id="userService" >
158.     <property name="userDao" ref="userDao"/>
159. </bean>
160. <bean id="userDao" /><bean id="userService" >
161.     <property name="userDao" ref="userDao"/>
162. </bean>
163. <bean id="userDao" />);<bean id="userService" >
164.     <property name="userDao" ref="userDao"/>
165. </bean>
166. <bean id="userDao" /><bean id="userService" >
167.     <property name="userDao" ref="userDao"/>
168. </bean>
169. <bean id="userDao" /><bean id="userService" >
170.     <property name="userDao" ref="userDao"/>
171. </bean>
172. <bean id="userDao" />} else {<bean id="userService" >
173.     <property name="userDao" ref="userDao"/>
174. </bean>
175. <bean id="userDao" /><bean id="userService" >
176.     <property name="userDao" ref="userDao"/>
177. </bean>
178. <bean id="userDao" /><bean id="userService" >
179.     <property name="userDao" ref="userDao"/>
180. </bean>
181. <bean id="userDao" /><bean id="userService" >
182.     <property name="userDao" ref="userDao"/>
183. </bean>
184. <bean id="userDao" />// 查询所有<bean id="userService" >
185.     <property name="userDao" ref="userDao"/>
186. </bean>
187. <bean id="userDao" /><bean id="userService" >
188.     <property name="userDao" ref="userDao"/>
189. </bean>
190. <bean id="userDao" /><bean id="userService" >
191.     <property name="userDao" ref="userDao"/>
192. </bean>
193. <bean id="userDao" /><bean id="userService" >
194.     <property name="userDao" ref="userDao"/>
195. </bean>
196. <bean id="userDao" />List users = userService.getAllUsers();<bean id="userService" >
197.     <property name="userDao" ref="userDao"/>
198. </bean>
199. <bean id="userDao" /><bean id="userService" >
200.     <property name="userDao" ref="userDao"/>
201. </bean>
202. <bean id="userDao" /><bean id="userService" >
203.     <property name="userDao" ref="userDao"/>
204. </bean>
205. <bean id="userDao" /><bean id="userService" >
206.     <property name="userDao" ref="userDao"/>
207. </bean>
208. <bean id="userDao" />return new JsonResult(<bean id="userService" >
209.     <property name="userDao" ref="userDao"/>
210. </bean>
211. <bean id="userDao" /><bean id="userService" >
212.     <property name="userDao" ref="userDao"/>
213. </bean>
214. <bean id="userDao" /><bean id="userService" >
215.     <property name="userDao" ref="userDao"/>
216. </bean>
217. <bean id="userDao" /><bean id="userService" >
218.     <property name="userDao" ref="userDao"/>
219. </bean>
220. <bean id="userDao" /><bean id="userService" >
221.     <property name="userDao" ref="userDao"/>
222. </bean>
223. <bean id="userDao" />ApiResponse.success(users, "获取用户列表成功").toMap()<bean id="userService" >
224.     <property name="userDao" ref="userDao"/>
225. </bean>
226. <bean id="userDao" /><bean id="userService" >
227.     <property name="userDao" ref="userDao"/>
228. </bean>
229. <bean id="userDao" /><bean id="userService" >
230.     <property name="userDao" ref="userDao"/>
231. </bean>
232. <bean id="userDao" /><bean id="userService" >
233.     <property name="userDao" ref="userDao"/>
234. </bean>
235. <bean id="userDao" />);<bean id="userService" >
236.     <property name="userDao" ref="userDao"/>
237. </bean>
238. <bean id="userDao" /><bean id="userService" >
239.     <property name="userDao" ref="userDao"/>
240. </bean>
241. <bean id="userDao" /><bean id="userService" >
242.     <property name="userDao" ref="userDao"/>
243. </bean>
244. <bean id="userDao" />}<bean id="userService" >
245.     <property name="userDao" ref="userDao"/>
246. </bean>
247. <bean id="userDao" /><bean id="userService" >
248.     <property name="userDao" ref="userDao"/>
249. </bean>
250. <bean id="userDao" />} catch (Exception e) {<bean id="userService" >
251.     <property name="userDao" ref="userDao"/>
252. </bean>
253. <bean id="userDao" /><bean id="userService" >
254.     <property name="userDao" ref="userDao"/>
255. </bean>
256. <bean id="userDao" /><bean id="userService" >
257.     <property name="userDao" ref="userDao"/>
258. </bean>
259. <bean id="userDao" />return new JsonResult(<bean id="userService" >
260.     <property name="userDao" ref="userDao"/>
261. </bean>
262. <bean id="userDao" /><bean id="userService" >
263.     <property name="userDao" ref="userDao"/>
264. </bean>
265. <bean id="userDao" /><bean id="userService" >
266.     <property name="userDao" ref="userDao"/>
267. </bean>
268. <bean id="userDao" /><bean id="userService" >
269.     <property name="userDao" ref="userDao"/>
270. </bean>
271. <bean id="userDao" />ApiResponse.failure("获取用户列表失败: " + e.getMessage()).toMap()<bean id="userService" >
272.     <property name="userDao" ref="userDao"/>
273. </bean>
274. <bean id="userDao" /><bean id="userService" >
275.     <property name="userDao" ref="userDao"/>
276. </bean>
277. <bean id="userDao" /><bean id="userService" >
278.     <property name="userDao" ref="userDao"/>
279. </bean>
280. <bean id="userDao" />);<bean id="userService" >
281.     <property name="userDao" ref="userDao"/>
282. </bean>
283. <bean id="userDao" /><bean id="userService" >
284.     <property name="userDao" ref="userDao"/>
285. </bean>
286. <bean id="userDao" />}<bean id="userService" >
287.     <property name="userDao" ref="userDao"/>
288. </bean>
289. <bean id="userDao" />}<bean id="userService" >
290.     <property name="userDao" ref="userDao"/>
291. </bean>
292. <bean id="userDao" />// 获取单个用户<bean id="userService" >
293.     <property name="userDao" ref="userDao"/>
294. </bean>
295. <bean id="userDao" />@RequestMapping("/get")<bean id="userService" >
296.     <property name="userDao" ref="userDao"/>
297. </bean>
298. <bean id="userDao" />@ResponseBody<bean id="userService" >
299.     <property name="userDao" ref="userDao"/>
300. </bean>
301. <bean id="userDao" />public ViewResult getById(HttpServletRequest request) {<bean id="userService" >
302.     <property name="userDao" ref="userDao"/>
303. </bean>
304. <bean id="userDao" /><bean id="userService" >
305.     <property name="userDao" ref="userDao"/>
306. </bean>
307. <bean id="userDao" />try {<bean id="userService" >
308.     <property name="userDao" ref="userDao"/>
309. </bean>
310. <bean id="userDao" /><bean id="userService" >
311.     <property name="userDao" ref="userDao"/>
312. </bean>
313. <bean id="userDao" /><bean id="userService" >
314.     <property name="userDao" ref="userDao"/>
315. </bean>
316. <bean id="userDao" />String idStr = request.getParameter("id");<bean id="userService" >
317.     <property name="userDao" ref="userDao"/>
318. </bean>
319. <bean id="userDao" /><bean id="userService" >
320.     <property name="userDao" ref="userDao"/>
321. </bean>
322. <bean id="userDao" /><bean id="userService" >
323.     <property name="userDao" ref="userDao"/>
324. </bean>
325. <bean id="userDao" />if (idStr == null || idStr.isEmpty()) {<bean id="userService" >
326.     <property name="userDao" ref="userDao"/>
327. </bean>
328. <bean id="userDao" /><bean id="userService" >
329.     <property name="userDao" ref="userDao"/>
330. </bean>
331. <bean id="userDao" /><bean id="userService" >
332.     <property name="userDao" ref="userDao"/>
333. </bean>
334. <bean id="userDao" /><bean id="userService" >
335.     <property name="userDao" ref="userDao"/>
336. </bean>
337. <bean id="userDao" />return new JsonResult(<bean id="userService" >
338.     <property name="userDao" ref="userDao"/>
339. </bean>
340. <bean id="userDao" /><bean id="userService" >
341.     <property name="userDao" ref="userDao"/>
342. </bean>
343. <bean id="userDao" /><bean id="userService" >
344.     <property name="userDao" ref="userDao"/>
345. </bean>
346. <bean id="userDao" /><bean id="userService" >
347.     <property name="userDao" ref="userDao"/>
348. </bean>
349. <bean id="userDao" /><bean id="userService" >
350.     <property name="userDao" ref="userDao"/>
351. </bean>
352. <bean id="userDao" />ApiResponse.badRequest("用户ID不能为空").toMap()<bean id="userService" >
353.     <property name="userDao" ref="userDao"/>
354. </bean>
355. <bean id="userDao" /><bean id="userService" >
356.     <property name="userDao" ref="userDao"/>
357. </bean>
358. <bean id="userDao" /><bean id="userService" >
359.     <property name="userDao" ref="userDao"/>
360. </bean>
361. <bean id="userDao" /><bean id="userService" >
362.     <property name="userDao" ref="userDao"/>
363. </bean>
364. <bean id="userDao" />);<bean id="userService" >
365.     <property name="userDao" ref="userDao"/>
366. </bean>
367. <bean id="userDao" /><bean id="userService" >
368.     <property name="userDao" ref="userDao"/>
369. </bean>
370. <bean id="userDao" /><bean id="userService" >
371.     <property name="userDao" ref="userDao"/>
372. </bean>
373. <bean id="userDao" />}<bean id="userService" >
374.     <property name="userDao" ref="userDao"/>
375. </bean>
376. <bean id="userDao" /><bean id="userService" >
377.     <property name="userDao" ref="userDao"/>
378. </bean>
379. <bean id="userDao" /><bean id="userService" >
380.     <property name="userDao" ref="userDao"/>
381. </bean>
382. <bean id="userDao" />Long id = Long.parseLong(idStr);<bean id="userService" >
383.     <property name="userDao" ref="userDao"/>
384. </bean>
385. <bean id="userDao" /><bean id="userService" >
386.     <property name="userDao" ref="userDao"/>
387. </bean>
388. <bean id="userDao" /><bean id="userService" >
389.     <property name="userDao" ref="userDao"/>
390. </bean>
391. <bean id="userDao" />User user = userService.getUserById(id);<bean id="userService" >
392.     <property name="userDao" ref="userDao"/>
393. </bean>
394. <bean id="userDao" /><bean id="userService" >
395.     <property name="userDao" ref="userDao"/>
396. </bean>
397. <bean id="userDao" /><bean id="userService" >
398.     <property name="userDao" ref="userDao"/>
399. </bean>
400. <bean id="userDao" />if (user == null) {<bean id="userService" >
401.     <property name="userDao" ref="userDao"/>
402. </bean>
403. <bean id="userDao" /><bean id="userService" >
404.     <property name="userDao" ref="userDao"/>
405. </bean>
406. <bean id="userDao" /><bean id="userService" >
407.     <property name="userDao" ref="userDao"/>
408. </bean>
409. <bean id="userDao" /><bean id="userService" >
410.     <property name="userDao" ref="userDao"/>
411. </bean>
412. <bean id="userDao" />return new JsonResult(<bean id="userService" >
413.     <property name="userDao" ref="userDao"/>
414. </bean>
415. <bean id="userDao" /><bean id="userService" >
416.     <property name="userDao" ref="userDao"/>
417. </bean>
418. <bean id="userDao" /><bean id="userService" >
419.     <property name="userDao" ref="userDao"/>
420. </bean>
421. <bean id="userDao" /><bean id="userService" >
422.     <property name="userDao" ref="userDao"/>
423. </bean>
424. <bean id="userDao" /><bean id="userService" >
425.     <property name="userDao" ref="userDao"/>
426. </bean>
427. <bean id="userDao" />ApiResponse.notFound("用户不存在").toMap()<bean id="userService" >
428.     <property name="userDao" ref="userDao"/>
429. </bean>
430. <bean id="userDao" /><bean id="userService" >
431.     <property name="userDao" ref="userDao"/>
432. </bean>
433. <bean id="userDao" /><bean id="userService" >
434.     <property name="userDao" ref="userDao"/>
435. </bean>
436. <bean id="userDao" /><bean id="userService" >
437.     <property name="userDao" ref="userDao"/>
438. </bean>
439. <bean id="userDao" />);<bean id="userService" >
440.     <property name="userDao" ref="userDao"/>
441. </bean>
442. <bean id="userDao" /><bean id="userService" >
443.     <property name="userDao" ref="userDao"/>
444. </bean>
445. <bean id="userDao" /><bean id="userService" >
446.     <property name="userDao" ref="userDao"/>
447. </bean>
448. <bean id="userDao" />}<bean id="userService" >
449.     <property name="userDao" ref="userDao"/>
450. </bean>
451. <bean id="userDao" /><bean id="userService" >
452.     <property name="userDao" ref="userDao"/>
453. </bean>
454. <bean id="userDao" /><bean id="userService" >
455.     <property name="userDao" ref="userDao"/>
456. </bean>
457. <bean id="userDao" />return new JsonResult(<bean id="userService" >
458.     <property name="userDao" ref="userDao"/>
459. </bean>
460. <bean id="userDao" /><bean id="userService" >
461.     <property name="userDao" ref="userDao"/>
462. </bean>
463. <bean id="userDao" /><bean id="userService" >
464.     <property name="userDao" ref="userDao"/>
465. </bean>
466. <bean id="userDao" /><bean id="userService" >
467.     <property name="userDao" ref="userDao"/>
468. </bean>
469. <bean id="userDao" />ApiResponse.success(user, "获取用户详情成功").toMap()<bean id="userService" >
470.     <property name="userDao" ref="userDao"/>
471. </bean>
472. <bean id="userDao" /><bean id="userService" >
473.     <property name="userDao" ref="userDao"/>
474. </bean>
475. <bean id="userDao" /><bean id="userService" >
476.     <property name="userDao" ref="userDao"/>
477. </bean>
478. <bean id="userDao" />);<bean id="userService" >
479.     <property name="userDao" ref="userDao"/>
480. </bean>
481. <bean id="userDao" /><bean id="userService" >
482.     <property name="userDao" ref="userDao"/>
483. </bean>
484. <bean id="userDao" />} catch (Exception e) {<bean id="userService" >
485.     <property name="userDao" ref="userDao"/>
486. </bean>
487. <bean id="userDao" /><bean id="userService" >
488.     <property name="userDao" ref="userDao"/>
489. </bean>
490. <bean id="userDao" /><bean id="userService" >
491.     <property name="userDao" ref="userDao"/>
492. </bean>
493. <bean id="userDao" />return new JsonResult(<bean id="userService" >
494.     <property name="userDao" ref="userDao"/>
495. </bean>
496. <bean id="userDao" /><bean id="userService" >
497.     <property name="userDao" ref="userDao"/>
498. </bean>
499. <bean id="userDao" /><bean id="userService" >
500.     <property name="userDao" ref="userDao"/>
501. </bean>
502. <bean id="userDao" /><bean id="userService" >
503.     <property name="userDao" ref="userDao"/>
504. </bean>
505. <bean id="userDao" />ApiResponse.failure("获取用户失败: " + e.getMessage()).toMap()<bean id="userService" >
506.     <property name="userDao" ref="userDao"/>
507. </bean>
508. <bean id="userDao" /><bean id="userService" >
509.     <property name="userDao" ref="userDao"/>
510. </bean>
511. <bean id="userDao" /><bean id="userService" >
512.     <property name="userDao" ref="userDao"/>
513. </bean>
514. <bean id="userDao" />);<bean id="userService" >
515.     <property name="userDao" ref="userDao"/>
516. </bean>
517. <bean id="userDao" /><bean id="userService" >
518.     <property name="userDao" ref="userDao"/>
519. </bean>
520. <bean id="userDao" />}<bean id="userService" >
521.     <property name="userDao" ref="userDao"/>
522. </bean>
523. <bean id="userDao" />}<bean id="userService" >
524.     <property name="userDao" ref="userDao"/>
525. </bean>
526. <bean id="userDao" />// 创建用户<bean id="userService" >
527.     <property name="userDao" ref="userDao"/>
528. </bean>
529. <bean id="userDao" />@RequestMapping("/create")<bean id="userService" >
530.     <property name="userDao" ref="userDao"/>
531. </bean>
532. <bean id="userDao" />@ResponseBody<bean id="userService" >
533.     <property name="userDao" ref="userDao"/>
534. </bean>
535. <bean id="userDao" />public ViewResult create(@RequestBody User user) {<bean id="userService" >
536.     <property name="userDao" ref="userDao"/>
537. </bean>
538. <bean id="userDao" /><bean id="userService" >
539.     <property name="userDao" ref="userDao"/>
540. </bean>
541. <bean id="userDao" />try {<bean id="userService" >
542.     <property name="userDao" ref="userDao"/>
543. </bean>
544. <bean id="userDao" /><bean id="userService" >
545.     <property name="userDao" ref="userDao"/>
546. </bean>
547. <bean id="userDao" /><bean id="userService" >
548.     <property name="userDao" ref="userDao"/>
549. </bean>
550. <bean id="userDao" />boolean success = userService.createUser(user);<bean id="userService" >
551.     <property name="userDao" ref="userDao"/>
552. </bean>
553. <bean id="userDao" /><bean id="userService" >
554.     <property name="userDao" ref="userDao"/>
555. </bean>
556. <bean id="userDao" /><bean id="userService" >
557.     <property name="userDao" ref="userDao"/>
558. </bean>
559. <bean id="userDao" />if (success) {<bean id="userService" >
560.     <property name="userDao" ref="userDao"/>
561. </bean>
562. <bean id="userDao" /><bean id="userService" >
563.     <property name="userDao" ref="userDao"/>
564. </bean>
565. <bean id="userDao" /><bean id="userService" >
566.     <property name="userDao" ref="userDao"/>
567. </bean>
568. <bean id="userDao" /><bean id="userService" >
569.     <property name="userDao" ref="userDao"/>
570. </bean>
571. <bean id="userDao" />return new JsonResult(<bean id="userService" >
572.     <property name="userDao" ref="userDao"/>
573. </bean>
574. <bean id="userDao" /><bean id="userService" >
575.     <property name="userDao" ref="userDao"/>
576. </bean>
577. <bean id="userDao" /><bean id="userService" >
578.     <property name="userDao" ref="userDao"/>
579. </bean>
580. <bean id="userDao" /><bean id="userService" >
581.     <property name="userDao" ref="userDao"/>
582. </bean>
583. <bean id="userDao" /><bean id="userService" >
584.     <property name="userDao" ref="userDao"/>
585. </bean>
586. <bean id="userDao" />ApiResponse.success(user, "创建用户成功").toMap()<bean id="userService" >
587.     <property name="userDao" ref="userDao"/>
588. </bean>
589. <bean id="userDao" /><bean id="userService" >
590.     <property name="userDao" ref="userDao"/>
591. </bean>
592. <bean id="userDao" /><bean id="userService" >
593.     <property name="userDao" ref="userDao"/>
594. </bean>
595. <bean id="userDao" /><bean id="userService" >
596.     <property name="userDao" ref="userDao"/>
597. </bean>
598. <bean id="userDao" />);<bean id="userService" >
599.     <property name="userDao" ref="userDao"/>
600. </bean>
601. <bean id="userDao" /><bean id="userService" >
602.     <property name="userDao" ref="userDao"/>
603. </bean>
604. <bean id="userDao" /><bean id="userService" >
605.     <property name="userDao" ref="userDao"/>
606. </bean>
607. <bean id="userDao" />} else {<bean id="userService" >
608.     <property name="userDao" ref="userDao"/>
609. </bean>
610. <bean id="userDao" /><bean id="userService" >
611.     <property name="userDao" ref="userDao"/>
612. </bean>
613. <bean id="userDao" /><bean id="userService" >
614.     <property name="userDao" ref="userDao"/>
615. </bean>
616. <bean id="userDao" /><bean id="userService" >
617.     <property name="userDao" ref="userDao"/>
618. </bean>
619. <bean id="userDao" />return new JsonResult(<bean id="userService" >
620.     <property name="userDao" ref="userDao"/>
621. </bean>
622. <bean id="userDao" /><bean id="userService" >
623.     <property name="userDao" ref="userDao"/>
624. </bean>
625. <bean id="userDao" /><bean id="userService" >
626.     <property name="userDao" ref="userDao"/>
627. </bean>
628. <bean id="userDao" /><bean id="userService" >
629.     <property name="userDao" ref="userDao"/>
630. </bean>
631. <bean id="userDao" /><bean id="userService" >
632.     <property name="userDao" ref="userDao"/>
633. </bean>
634. <bean id="userDao" />ApiResponse.failure("创建用户失败").toMap()<bean id="userService" >
635.     <property name="userDao" ref="userDao"/>
636. </bean>
637. <bean id="userDao" /><bean id="userService" >
638.     <property name="userDao" ref="userDao"/>
639. </bean>
640. <bean id="userDao" /><bean id="userService" >
641.     <property name="userDao" ref="userDao"/>
642. </bean>
643. <bean id="userDao" /><bean id="userService" >
644.     <property name="userDao" ref="userDao"/>
645. </bean>
646. <bean id="userDao" />);<bean id="userService" >
647.     <property name="userDao" ref="userDao"/>
648. </bean>
649. <bean id="userDao" /><bean id="userService" >
650.     <property name="userDao" ref="userDao"/>
651. </bean>
652. <bean id="userDao" /><bean id="userService" >
653.     <property name="userDao" ref="userDao"/>
654. </bean>
655. <bean id="userDao" />}<bean id="userService" >
656.     <property name="userDao" ref="userDao"/>
657. </bean>
658. <bean id="userDao" /><bean id="userService" >
659.     <property name="userDao" ref="userDao"/>
660. </bean>
661. <bean id="userDao" />} catch (Exception e) {<bean id="userService" >
662.     <property name="userDao" ref="userDao"/>
663. </bean>
664. <bean id="userDao" /><bean id="userService" >
665.     <property name="userDao" ref="userDao"/>
666. </bean>
667. <bean id="userDao" /><bean id="userService" >
668.     <property name="userDao" ref="userDao"/>
669. </bean>
670. <bean id="userDao" />return new JsonResult(<bean id="userService" >
671.     <property name="userDao" ref="userDao"/>
672. </bean>
673. <bean id="userDao" /><bean id="userService" >
674.     <property name="userDao" ref="userDao"/>
675. </bean>
676. <bean id="userDao" /><bean id="userService" >
677.     <property name="userDao" ref="userDao"/>
678. </bean>
679. <bean id="userDao" /><bean id="userService" >
680.     <property name="userDao" ref="userDao"/>
681. </bean>
682. <bean id="userDao" />ApiResponse.failure("创建用户失败: " + e.getMessage()).toMap()<bean id="userService" >
683.     <property name="userDao" ref="userDao"/>
684. </bean>
685. <bean id="userDao" /><bean id="userService" >
686.     <property name="userDao" ref="userDao"/>
687. </bean>
688. <bean id="userDao" /><bean id="userService" >
689.     <property name="userDao" ref="userDao"/>
690. </bean>
691. <bean id="userDao" />);<bean id="userService" >
692.     <property name="userDao" ref="userDao"/>
693. </bean>
694. <bean id="userDao" /><bean id="userService" >
695.     <property name="userDao" ref="userDao"/>
696. </bean>
697. <bean id="userDao" />}<bean id="userService" >
698.     <property name="userDao" ref="userDao"/>
699. </bean>
700. <bean id="userDao" />}<bean id="userService" >
701.     <property name="userDao" ref="userDao"/>
702. </bean>
703. <bean id="userDao" />// 更新用户<bean id="userService" >
704.     <property name="userDao" ref="userDao"/>
705. </bean>
706. <bean id="userDao" />@RequestMapping("/update")<bean id="userService" >
707.     <property name="userDao" ref="userDao"/>
708. </bean>
709. <bean id="userDao" />@ResponseBody<bean id="userService" >
710.     <property name="userDao" ref="userDao"/>
711. </bean>
712. <bean id="userDao" />public ViewResult update(@RequestBody User user) {<bean id="userService" >
713.     <property name="userDao" ref="userDao"/>
714. </bean>
715. <bean id="userDao" /><bean id="userService" >
716.     <property name="userDao" ref="userDao"/>
717. </bean>
718. <bean id="userDao" />try {<bean id="userService" >
719.     <property name="userDao" ref="userDao"/>
720. </bean>
721. <bean id="userDao" /><bean id="userService" >
722.     <property name="userDao" ref="userDao"/>
723. </bean>
724. <bean id="userDao" /><bean id="userService" >
725.     <property name="userDao" ref="userDao"/>
726. </bean>
727. <bean id="userDao" />boolean success = userService.updateUser(user);<bean id="userService" >
728.     <property name="userDao" ref="userDao"/>
729. </bean>
730. <bean id="userDao" /><bean id="userService" >
731.     <property name="userDao" ref="userDao"/>
732. </bean>
733. <bean id="userDao" /><bean id="userService" >
734.     <property name="userDao" ref="userDao"/>
735. </bean>
736. <bean id="userDao" />if (success) {<bean id="userService" >
737.     <property name="userDao" ref="userDao"/>
738. </bean>
739. <bean id="userDao" /><bean id="userService" >
740.     <property name="userDao" ref="userDao"/>
741. </bean>
742. <bean id="userDao" /><bean id="userService" >
743.     <property name="userDao" ref="userDao"/>
744. </bean>
745. <bean id="userDao" /><bean id="userService" >
746.     <property name="userDao" ref="userDao"/>
747. </bean>
748. <bean id="userDao" />return new JsonResult(<bean id="userService" >
749.     <property name="userDao" ref="userDao"/>
750. </bean>
751. <bean id="userDao" /><bean id="userService" >
752.     <property name="userDao" ref="userDao"/>
753. </bean>
754. <bean id="userDao" /><bean id="userService" >
755.     <property name="userDao" ref="userDao"/>
756. </bean>
757. <bean id="userDao" /><bean id="userService" >
758.     <property name="userDao" ref="userDao"/>
759. </bean>
760. <bean id="userDao" /><bean id="userService" >
761.     <property name="userDao" ref="userDao"/>
762. </bean>
763. <bean id="userDao" />ApiResponse.success(user, "更新用户成功").toMap()<bean id="userService" >
764.     <property name="userDao" ref="userDao"/>
765. </bean>
766. <bean id="userDao" /><bean id="userService" >
767.     <property name="userDao" ref="userDao"/>
768. </bean>
769. <bean id="userDao" /><bean id="userService" >
770.     <property name="userDao" ref="userDao"/>
771. </bean>
772. <bean id="userDao" /><bean id="userService" >
773.     <property name="userDao" ref="userDao"/>
774. </bean>
775. <bean id="userDao" />);<bean id="userService" >
776.     <property name="userDao" ref="userDao"/>
777. </bean>
778. <bean id="userDao" /><bean id="userService" >
779.     <property name="userDao" ref="userDao"/>
780. </bean>
781. <bean id="userDao" /><bean id="userService" >
782.     <property name="userDao" ref="userDao"/>
783. </bean>
784. <bean id="userDao" />} else {<bean id="userService" >
785.     <property name="userDao" ref="userDao"/>
786. </bean>
787. <bean id="userDao" /><bean id="userService" >
788.     <property name="userDao" ref="userDao"/>
789. </bean>
790. <bean id="userDao" /><bean id="userService" >
791.     <property name="userDao" ref="userDao"/>
792. </bean>
793. <bean id="userDao" /><bean id="userService" >
794.     <property name="userDao" ref="userDao"/>
795. </bean>
796. <bean id="userDao" />return new JsonResult(<bean id="userService" >
797.     <property name="userDao" ref="userDao"/>
798. </bean>
799. <bean id="userDao" /><bean id="userService" >
800.     <property name="userDao" ref="userDao"/>
801. </bean>
802. <bean id="userDao" /><bean id="userService" >
803.     <property name="userDao" ref="userDao"/>
804. </bean>
805. <bean id="userDao" /><bean id="userService" >
806.     <property name="userDao" ref="userDao"/>
807. </bean>
808. <bean id="userDao" /><bean id="userService" >
809.     <property name="userDao" ref="userDao"/>
810. </bean>
811. <bean id="userDao" />ApiResponse.failure("更新用户失败").toMap()<bean id="userService" >
812.     <property name="userDao" ref="userDao"/>
813. </bean>
814. <bean id="userDao" /><bean id="userService" >
815.     <property name="userDao" ref="userDao"/>
816. </bean>
817. <bean id="userDao" /><bean id="userService" >
818.     <property name="userDao" ref="userDao"/>
819. </bean>
820. <bean id="userDao" /><bean id="userService" >
821.     <property name="userDao" ref="userDao"/>
822. </bean>
823. <bean id="userDao" />);<bean id="userService" >
824.     <property name="userDao" ref="userDao"/>
825. </bean>
826. <bean id="userDao" /><bean id="userService" >
827.     <property name="userDao" ref="userDao"/>
828. </bean>
829. <bean id="userDao" /><bean id="userService" >
830.     <property name="userDao" ref="userDao"/>
831. </bean>
832. <bean id="userDao" />}<bean id="userService" >
833.     <property name="userDao" ref="userDao"/>
834. </bean>
835. <bean id="userDao" /><bean id="userService" >
836.     <property name="userDao" ref="userDao"/>
837. </bean>
838. <bean id="userDao" />} catch (Exception e) {<bean id="userService" >
839.     <property name="userDao" ref="userDao"/>
840. </bean>
841. <bean id="userDao" /><bean id="userService" >
842.     <property name="userDao" ref="userDao"/>
843. </bean>
844. <bean id="userDao" /><bean id="userService" >
845.     <property name="userDao" ref="userDao"/>
846. </bean>
847. <bean id="userDao" />return new JsonResult(<bean id="userService" >
848.     <property name="userDao" ref="userDao"/>
849. </bean>
850. <bean id="userDao" /><bean id="userService" >
851.     <property name="userDao" ref="userDao"/>
852. </bean>
853. <bean id="userDao" /><bean id="userService" >
854.     <property name="userDao" ref="userDao"/>
855. </bean>
856. <bean id="userDao" /><bean id="userService" >
857.     <property name="userDao" ref="userDao"/>
858. </bean>
859. <bean id="userDao" />ApiResponse.failure("更新用户失败: " + e.getMessage()).toMap()<bean id="userService" >
860.     <property name="userDao" ref="userDao"/>
861. </bean>
862. <bean id="userDao" /><bean id="userService" >
863.     <property name="userDao" ref="userDao"/>
864. </bean>
865. <bean id="userDao" /><bean id="userService" >
866.     <property name="userDao" ref="userDao"/>
867. </bean>
868. <bean id="userDao" />);<bean id="userService" >
869.     <property name="userDao" ref="userDao"/>
870. </bean>
871. <bean id="userDao" /><bean id="userService" >
872.     <property name="userDao" ref="userDao"/>
873. </bean>
874. <bean id="userDao" />}<bean id="userService" >
875.     <property name="userDao" ref="userDao"/>
876. </bean>
877. <bean id="userDao" />}<bean id="userService" >
878.     <property name="userDao" ref="userDao"/>
879. </bean>
880. <bean id="userDao" />// 删除用户<bean id="userService" >
881.     <property name="userDao" ref="userDao"/>
882. </bean>
883. <bean id="userDao" />@RequestMapping("/delete")<bean id="userService" >
884.     <property name="userDao" ref="userDao"/>
885. </bean>
886. <bean id="userDao" />@ResponseBody<bean id="userService" >
887.     <property name="userDao" ref="userDao"/>
888. </bean>
889. <bean id="userDao" />public ViewResult delete(HttpServletRequest request) {<bean id="userService" >
890.     <property name="userDao" ref="userDao"/>
891. </bean>
892. <bean id="userDao" /><bean id="userService" >
893.     <property name="userDao" ref="userDao"/>
894. </bean>
895. <bean id="userDao" />try {<bean id="userService" >
896.     <property name="userDao" ref="userDao"/>
897. </bean>
898. <bean id="userDao" /><bean id="userService" >
899.     <property name="userDao" ref="userDao"/>
900. </bean>
901. <bean id="userDao" /><bean id="userService" >
902.     <property name="userDao" ref="userDao"/>
903. </bean>
904. <bean id="userDao" />String idStr = request.getParameter("id");<bean id="userService" >
905.     <property name="userDao" ref="userDao"/>
906. </bean>
907. <bean id="userDao" /><bean id="userService" >
908.     <property name="userDao" ref="userDao"/>
909. </bean>
910. <bean id="userDao" /><bean id="userService" >
911.     <property name="userDao" ref="userDao"/>
912. </bean>
913. <bean id="userDao" />if (idStr == null || idStr.isEmpty()) {<bean id="userService" >
914.     <property name="userDao" ref="userDao"/>
915. </bean>
916. <bean id="userDao" /><bean id="userService" >
917.     <property name="userDao" ref="userDao"/>
918. </bean>
919. <bean id="userDao" /><bean id="userService" >
920.     <property name="userDao" ref="userDao"/>
921. </bean>
922. <bean id="userDao" /><bean id="userService" >
923.     <property name="userDao" ref="userDao"/>
924. </bean>
925. <bean id="userDao" />return new JsonResult(<bean id="userService" >
926.     <property name="userDao" ref="userDao"/>
927. </bean>
928. <bean id="userDao" /><bean id="userService" >
929.     <property name="userDao" ref="userDao"/>
930. </bean>
931. <bean id="userDao" /><bean id="userService" >
932.     <property name="userDao" ref="userDao"/>
933. </bean>
934. <bean id="userDao" /><bean id="userService" >
935.     <property name="userDao" ref="userDao"/>
936. </bean>
937. <bean id="userDao" /><bean id="userService" >
938.     <property name="userDao" ref="userDao"/>
939. </bean>
940. <bean id="userDao" />ApiResponse.badRequest("用户ID不能为空").toMap()<bean id="userService" >
941.     <property name="userDao" ref="userDao"/>
942. </bean>
943. <bean id="userDao" /><bean id="userService" >
944.     <property name="userDao" ref="userDao"/>
945. </bean>
946. <bean id="userDao" /><bean id="userService" >
947.     <property name="userDao" ref="userDao"/>
948. </bean>
949. <bean id="userDao" /><bean id="userService" >
950.     <property name="userDao" ref="userDao"/>
951. </bean>
952. <bean id="userDao" />);<bean id="userService" >
953.     <property name="userDao" ref="userDao"/>
954. </bean>
955. <bean id="userDao" /><bean id="userService" >
956.     <property name="userDao" ref="userDao"/>
957. </bean>
958. <bean id="userDao" /><bean id="userService" >
959.     <property name="userDao" ref="userDao"/>
960. </bean>
961. <bean id="userDao" />}<bean id="userService" >
962.     <property name="userDao" ref="userDao"/>
963. </bean>
964. <bean id="userDao" /><bean id="userService" >
965.     <property name="userDao" ref="userDao"/>
966. </bean>
967. <bean id="userDao" /><bean id="userService" >
968.     <property name="userDao" ref="userDao"/>
969. </bean>
970. <bean id="userDao" />Long id = Long.parseLong(idStr);<bean id="userService" >
971.     <property name="userDao" ref="userDao"/>
972. </bean>
973. <bean id="userDao" /><bean id="userService" >
974.     <property name="userDao" ref="userDao"/>
975. </bean>
976. <bean id="userDao" /><bean id="userService" >
977.     <property name="userDao" ref="userDao"/>
978. </bean>
979. <bean id="userDao" />boolean success = userService.deleteUser(id);<bean id="userService" >
980.     <property name="userDao" ref="userDao"/>
981. </bean>
982. <bean id="userDao" /><bean id="userService" >
983.     <property name="userDao" ref="userDao"/>
984. </bean>
985. <bean id="userDao" /><bean id="userService" >
986.     <property name="userDao" ref="userDao"/>
987. </bean>
988. <bean id="userDao" />if (success) {<bean id="userService" >
989.     <property name="userDao" ref="userDao"/>
990. </bean>
991. <bean id="userDao" /><bean id="userService" >
992.     <property name="userDao" ref="userDao"/>
993. </bean>
994. <bean id="userDao" /><bean id="userService" >
995.     <property name="userDao" ref="userDao"/>
996. </bean>
997. <bean id="userDao" /><bean id="userService" >
998.     <property name="userDao" ref="userDao"/>
999. </bean>
1000. <bean id="userDao" />return new JsonResult(<bean id="userService" >
1001.     <property name="userDao" ref="userDao"/>
1002. </bean>
1003. <bean id="userDao" /><bean id="userService" >
1004.     <property name="userDao" ref="userDao"/>
1005. </bean>
1006. <bean id="userDao" /><bean id="userService" >
1007.     <property name="userDao" ref="userDao"/>
1008. </bean>
1009. <bean id="userDao" /><bean id="userService" >
1010.     <property name="userDao" ref="userDao"/>
1011. </bean>
1012. <bean id="userDao" /><bean id="userService" >
1013.     <property name="userDao" ref="userDao"/>
1014. </bean>
1015. <bean id="userDao" />ApiResponse.success(null, "删除用户成功").toMap()<bean id="userService" >
1016.     <property name="userDao" ref="userDao"/>
1017. </bean>
1018. <bean id="userDao" /><bean id="userService" >
1019.     <property name="userDao" ref="userDao"/>
1020. </bean>
1021. <bean id="userDao" /><bean id="userService" >
1022.     <property name="userDao" ref="userDao"/>
1023. </bean>
1024. <bean id="userDao" /><bean id="userService" >
1025.     <property name="userDao" ref="userDao"/>
1026. </bean>
1027. <bean id="userDao" />);<bean id="userService" >
1028.     <property name="userDao" ref="userDao"/>
1029. </bean>
1030. <bean id="userDao" /><bean id="userService" >
1031.     <property name="userDao" ref="userDao"/>
1032. </bean>
1033. <bean id="userDao" /><bean id="userService" >
1034.     <property name="userDao" ref="userDao"/>
1035. </bean>
1036. <bean id="userDao" />} else {<bean id="userService" >
1037.     <property name="userDao" ref="userDao"/>
1038. </bean>
1039. <bean id="userDao" /><bean id="userService" >
1040.     <property name="userDao" ref="userDao"/>
1041. </bean>
1042. <bean id="userDao" /><bean id="userService" >
1043.     <property name="userDao" ref="userDao"/>
1044. </bean>
1045. <bean id="userDao" /><bean id="userService" >
1046.     <property name="userDao" ref="userDao"/>
1047. </bean>
1048. <bean id="userDao" />return new JsonResult(<bean id="userService" >
1049.     <property name="userDao" ref="userDao"/>
1050. </bean>
1051. <bean id="userDao" /><bean id="userService" >
1052.     <property name="userDao" ref="userDao"/>
1053. </bean>
1054. <bean id="userDao" /><bean id="userService" >
1055.     <property name="userDao" ref="userDao"/>
1056. </bean>
1057. <bean id="userDao" /><bean id="userService" >
1058.     <property name="userDao" ref="userDao"/>
1059. </bean>
1060. <bean id="userDao" /><bean id="userService" >
1061.     <property name="userDao" ref="userDao"/>
1062. </bean>
1063. <bean id="userDao" />ApiResponse.failure("删除用户失败").toMap()<bean id="userService" >
1064.     <property name="userDao" ref="userDao"/>
1065. </bean>
1066. <bean id="userDao" /><bean id="userService" >
1067.     <property name="userDao" ref="userDao"/>
1068. </bean>
1069. <bean id="userDao" /><bean id="userService" >
1070.     <property name="userDao" ref="userDao"/>
1071. </bean>
1072. <bean id="userDao" /><bean id="userService" >
1073.     <property name="userDao" ref="userDao"/>
1074. </bean>
1075. <bean id="userDao" />);<bean id="userService" >
1076.     <property name="userDao" ref="userDao"/>
1077. </bean>
1078. <bean id="userDao" /><bean id="userService" >
1079.     <property name="userDao" ref="userDao"/>
1080. </bean>
1081. <bean id="userDao" /><bean id="userService" >
1082.     <property name="userDao" ref="userDao"/>
1083. </bean>
1084. <bean id="userDao" />}<bean id="userService" >
1085.     <property name="userDao" ref="userDao"/>
1086. </bean>
1087. <bean id="userDao" /><bean id="userService" >
1088.     <property name="userDao" ref="userDao"/>
1089. </bean>
1090. <bean id="userDao" />} catch (Exception e) {<bean id="userService" >
1091.     <property name="userDao" ref="userDao"/>
1092. </bean>
1093. <bean id="userDao" /><bean id="userService" >
1094.     <property name="userDao" ref="userDao"/>
1095. </bean>
1096. <bean id="userDao" /><bean id="userService" >
1097.     <property name="userDao" ref="userDao"/>
1098. </bean>
1099. <bean id="userDao" />return new JsonResult(<bean id="userService" >
1100.     <property name="userDao" ref="userDao"/>
1101. </bean>
1102. <bean id="userDao" /><bean id="userService" >
1103.     <property name="userDao" ref="userDao"/>
1104. </bean>
1105. <bean id="userDao" /><bean id="userService" >
1106.     <property name="userDao" ref="userDao"/>
1107. </bean>
1108. <bean id="userDao" /><bean id="userService" >
1109.     <property name="userDao" ref="userDao"/>
1110. </bean>
1111. <bean id="userDao" />ApiResponse.failure("删除用户失败: " + e.getMessage()).toMap()<bean id="userService" >
1112.     <property name="userDao" ref="userDao"/>
1113. </bean>
1114. <bean id="userDao" /><bean id="userService" >
1115.     <property name="userDao" ref="userDao"/>
1116. </bean>
1117. <bean id="userDao" /><bean id="userService" >
1118.     <property name="userDao" ref="userDao"/>
1119. </bean>
1120. <bean id="userDao" />);<bean id="userService" >
1121.     <property name="userDao" ref="userDao"/>
1122. </bean>
1123. <bean id="userDao" /><bean id="userService" >
1124.     <property name="userDao" ref="userDao"/>
1125. </bean>
1126. <bean id="userDao" />}<bean id="userService" >
1127.     <property name="userDao" ref="userDao"/>
1128. </bean>
1129. <bean id="userDao" />}}

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5. 统一响应封装 - ApiResponse

为了简化Controller代码，我们提供了ApiResponse工具类：

1. public class ApiResponse {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />private Integer code;<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private String message;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />private Object data;<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />// 成功响应<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />public static ApiResponse success(Object data, String message) {<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" /><bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />return new ApiResponse(200, message, data);<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />}<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />// 分页响应<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />public static ApiResponse page(List list, int page, int pageSize, long total) {<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />PageResult pageResult = PageResult.of(list, page, pageSize, total);<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />return success(pageResult, "获取列表成功");<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />}<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />// 失败响应<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />public static ApiResponse failure(String message) {<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />return new ApiResponse(500, message, null);<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" />}<bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />public static ApiResponse badRequest(String message) {<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" /><bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" />return new ApiResponse(400, message, null);<bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />}<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />public static ApiResponse notFound(String message) {<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" />return new ApiResponse(404, message, null);<bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />}}

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对比一下：
传统方式（手动构建Map）：

1. public class User {
2.     private Long id;
3.     private String name;
4.     private String email;
5.     private String phone;
6.     private Long createdTime;
7.     private Long updatedTime;
9.     // getter/setter省略
10. }

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使用ApiResponse（一行搞定）：

1. @Repository
2. public class UserDao {
3.     @Autowired
4.     private JdbcTemplate jdbcTemplate;
6.     // 查询所有用户
7.     public List<User> findAll() {
8.         return jdbcTemplate.query(
9.             "SELECT * FROM users ORDER BY id DESC",
10.             this::mapRow
11.         );
12.     }
14.     // 根据ID查询
15.     public User findById(Long id) {
16.         return jdbcTemplate.queryForObject(
17.             "SELECT * FROM users WHERE id = ?",
18.             this::mapRow,
19.             id
20.         );
21.     }
23.     // 分页查询
24.     public List<User> findByPage(int page, int pageSize) {
25.         int offset = (page - 1) * pageSize;
26.         return jdbcTemplate.query(
27.             "SELECT * FROM users ORDER BY id DESC LIMIT ? OFFSET ?",
28.             this::mapRow,
29.             pageSize, offset
30.         );
31.     }
33.     // 创建用户
34.     public int insert(User user) {
35.         return jdbcTemplate.update(
36.             "INSERT INTO users (name, email, phone, created_time, updated_time) " +
37.             "VALUES (?, ?, ?, ?, ?)",
38.             user.getName(), user.getEmail(), user.getPhone(),
39.             System.currentTimeMillis(), System.currentTimeMillis()
40.         );
41.     }
43.     // 更新用户
44.     public int update(User user) {
45.         return jdbcTemplate.update(
46.             "UPDATE users SET name = ?, email = ?, phone = ?, " +
47.             "updated_time = ? WHERE id = ?",
48.             user.getName(), user.getEmail(), user.getPhone(),
49.             System.currentTimeMillis(), user.getId()
50.         );
51.     }
53.     // 删除用户
54.     public int delete(Long id) {
55.         return jdbcTemplate.update("DELETE FROM users WHERE id = ?", id);
56.     }
58.     // 结果集映射
59.     private User mapRow(ResultSet rs, int rowNum) throws SQLException {
60.         User user = new User();
61.         user.setId(rs.getLong("id"));
62.         user.setName(rs.getString("name"));
63.         user.setEmail(rs.getString("email"));
64.         user.setPhone(rs.getString("phone"));
65.         user.setCreatedTime(rs.getLong("created_time"));
66.         user.setUpdatedTime(rs.getLong("updated_time"));
67.         return user;
68.     }
69. }

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6. 分页结果 - PageResult

分页是Web应用的常见需求，SpringWind提供了PageResult：

1. public class PageResult {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />private List list;<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />  // 数据列表<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />private Integer page;<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />  // 当前页码<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />private Integer pageSize;<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />  // 每页大小<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />private Long total;<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />// 总记录数<bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />private Integer totalPages;<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />// 总页数<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" />private Boolean hasPrevious;   // 是否有上一页<bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />private Boolean hasNext;<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />   // 是否有下一页<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" />private Boolean first;<bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" /><bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /> // 是否是第一页<bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />private Boolean last;<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" /><bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" />  // 是否是最后一页<bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />// 创建分页结果<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />public static  PageResult of(List list, int page, int pageSize, long total) {<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" />PageResult result = new PageResult();<bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" /><bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" />result.setList(list);<bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" /><bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" />result.setPage(page);<bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" /><bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" />result.setPageSize(pageSize);<bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" /><bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" />result.setTotal(total);<bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" /><bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" />result.setTotalPages((int) Math.ceil((double) total / pageSize));<bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" /><bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" />result.setHasPrevious(page > 1);<bean id="userService" >
119.     <property name="userDao" ref="userDao"/>
120. </bean>
121. <bean id="userDao" /><bean id="userService" >
122.     <property name="userDao" ref="userDao"/>
123. </bean>
124. <bean id="userDao" />result.setHasNext(page < result.getTotalPages());<bean id="userService" >
125.     <property name="userDao" ref="userDao"/>
126. </bean>
127. <bean id="userDao" /><bean id="userService" >
128.     <property name="userDao" ref="userDao"/>
129. </bean>
130. <bean id="userDao" />result.setFirst(page == 1);<bean id="userService" >
131.     <property name="userDao" ref="userDao"/>
132. </bean>
133. <bean id="userDao" /><bean id="userService" >
134.     <property name="userDao" ref="userDao"/>
135. </bean>
136. <bean id="userDao" />result.setLast(page == result.getTotalPages());<bean id="userService" >
137.     <property name="userDao" ref="userDao"/>
138. </bean>
139. <bean id="userDao" /><bean id="userService" >
140.     <property name="userDao" ref="userDao"/>
141. </bean>
142. <bean id="userDao" />return result;<bean id="userService" >
143.     <property name="userDao" ref="userDao"/>
144. </bean>
145. <bean id="userDao" />}}

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分页响应示例：

1. {  "code": 200,  "message": "获取列表成功",  "data": {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />"list": [<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />  {"id": 1, "name": "admin", "email": "admin@example.com"},<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />  {"id": 2, "name": "test", "email": "test@example.com"}<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />],<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />"page": 2,<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />"pageSize": 10,<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />"total": 100,<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />"totalPages": 10,<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />"hasPrevious": true,<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />"hasNext": true,<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />"first": false,<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" />"last": false  }}

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前端可以根据hasPrevious和hasNext来禁用/启用分页按钮，非常方便。
7. 启动应用

1. public class UserDemoApplication {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />public static void main(String[] args) {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" /><bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />if (args.length > 0 && "--web".equals(args[0])) {<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />// Web模式：启动嵌入式Tomcat<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />startWebServer();<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />} else {<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" />// 控制台模式：直接运行<bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" /><bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" />runConsoleDemo();<bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />}<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" />}<bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" />private static void startWebServer() {<bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" /><bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" />// 创建SpringWind容器<bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />SpringWindApplicationContext context =<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /><bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />new SpringWindApplicationContext(UserDemoApplication.class);<bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" /><bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" />// 启动Tomcat<bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" /><bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" />Tomcat tomcat = new Tomcat();<bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" /><bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" />tomcat.setPort(8080);<bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" /><bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" />// ... 配置Servlet<bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" /><bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" />tomcat.start();<bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" />}}

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8. API测试

1. Map<String, Object> result = new HashMap<>();
2. result.put("code", 200);
3. result.put("message", "获取用户成功");
4. result.put("data", user);
5. return new JsonResult(result);

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示例2：Web Demo - 企业网站内容管理系统

这是一个企业网站的CMS系统，展示了SpringWind的Web MVC功能。请见examples/web-demo，此处不再展开。
Springwind改进点

SpringWind目前实现了Spring的核心功能，但还有很多可以改进的地方。
已实现的功能 ✅

• IoC容器（组件扫描、Bean管理）
  
• 依赖注入（字段注入、方法注入）
  
• 循环依赖解决（三级缓存）
  
• AOP（JDK动态代理、CGLIB代理）
  
• Web MVC（请求映射、参数绑定、JSON响应）
  
• JDBC模板（查询、更新、批量操作）
  
• 分页支持（PageResult）
  
• 统一响应封装（ApiResponse）
  

待改进的功能 ⏳

1. 事务管理

当前状态： 没有事务支持，需要手动管理
改进方案：

1. // 声明式事务@Servicepublic class UserService {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Transactional<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />public void registerUser(User user) {<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />userDao.insert(user);<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />emailService.sendWelcomeEmail(user);  // 如果发邮件失败，用户创建也回滚<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />}}// 实现思路：利用AOP拦截@Transactional方法@Aspectpublic class TransactionAspect {<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />@Around("@annotation(Transactional)")<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />public Object aroundTransaction(Method method, Object[] args) {<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" /><bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" />Connection conn = null;<bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" />try {<bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />conn = dataSource.getConnection();<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" /><bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" /><bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />conn.setAutoCommit(false);  // 开启事务<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" /><bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" /><bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />Object result = method.invoke(args);  // 执行业务方法<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" /><bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" />conn.commit();  // 提交事务<bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" /><bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" /><bean id="userService" >
83.     <property name="userDao" ref="userDao"/>
84. </bean>
85. <bean id="userDao" />return result;<bean id="userService" >
86.     <property name="userDao" ref="userDao"/>
87. </bean>
88. <bean id="userDao" /><bean id="userService" >
89.     <property name="userDao" ref="userDao"/>
90. </bean>
91. <bean id="userDao" />} catch (Exception e) {<bean id="userService" >
92.     <property name="userDao" ref="userDao"/>
93. </bean>
94. <bean id="userDao" /><bean id="userService" >
95.     <property name="userDao" ref="userDao"/>
96. </bean>
97. <bean id="userDao" /><bean id="userService" >
98.     <property name="userDao" ref="userDao"/>
99. </bean>
100. <bean id="userDao" />if (conn != null) {<bean id="userService" >
101.     <property name="userDao" ref="userDao"/>
102. </bean>
103. <bean id="userDao" /><bean id="userService" >
104.     <property name="userDao" ref="userDao"/>
105. </bean>
106. <bean id="userDao" /><bean id="userService" >
107.     <property name="userDao" ref="userDao"/>
108. </bean>
109. <bean id="userDao" /><bean id="userService" >
110.     <property name="userDao" ref="userDao"/>
111. </bean>
112. <bean id="userDao" />conn.rollback();  // 回滚事务<bean id="userService" >
113.     <property name="userDao" ref="userDao"/>
114. </bean>
115. <bean id="userDao" /><bean id="userService" >
116.     <property name="userDao" ref="userDao"/>
117. </bean>
118. <bean id="userDao" /><bean id="userService" >
119.     <property name="userDao" ref="userDao"/>
120. </bean>
121. <bean id="userDao" />}<bean id="userService" >
122.     <property name="userDao" ref="userDao"/>
123. </bean>
124. <bean id="userDao" /><bean id="userService" >
125.     <property name="userDao" ref="userDao"/>
126. </bean>
127. <bean id="userDao" /><bean id="userService" >
128.     <property name="userDao" ref="userDao"/>
129. </bean>
130. <bean id="userDao" />throw e;<bean id="userService" >
131.     <property name="userDao" ref="userDao"/>
132. </bean>
133. <bean id="userDao" /><bean id="userService" >
134.     <property name="userDao" ref="userDao"/>
135. </bean>
136. <bean id="userDao" />}<bean id="userService" >
137.     <property name="userDao" ref="userDao"/>
138. </bean>
139. <bean id="userDao" />}}

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2. 构造器注入

当前状态： 只支持字段注入和方法注入
改进方案：

1. // 支持构造器注入@Servicepublic class UserService {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />private final UserDao userDao;  // final保证不可变<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />@Autowired<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />public UserService(UserDao userDao) {<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" /><bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />this.userDao = userDao;<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />}}// 实现思路：// 1. 扫描构造器上的@Autowired// 2. 解析构造器参数类型// 3. 从容器中查找对应的Bean// 4. 调用构造器创建对象

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3. Bean作用域

当前状态： 只支持单例（Singleton）
改进方案：

1. @Service@Scope("prototype")  // 每次获取都创建新实例public class PrototypeService {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// ...}@Service@Scope("request")  // 每个HTTP请求一个实例public class RequestScopedService {<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />// ...}

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4. 更强大的AOP

当前改进：

• 支持切点表达式：
  

1. @Before("execution(* com.example.service.*.*(..))") // 支持AspectJ表达式public void logBefore(JoinPoint joinPoint) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// ...}

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• 支持切点组合：
  

1. @Pointcut("execution(* com.example.service.*.*(..))")public void serviceMethods() {}@Pointcut("@annotation(Transactional)")public void transactionalMethods() {}@Before("serviceMethods() && transactionalMethods()")public void beforeServiceTransaction() {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />// 同时满足两个切点}

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• 支持@Around获取方法参数：
  

1. @Around("com.example.service.*.*")public Object aroundAdvice(ProceedingJoinPoint pjp) {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />Object[] args = pjp.getArgs();  // 获取方法参数<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />System.out.println("参数: " + Arrays.toString(args));<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />return pjp.proceed();  // 继续执行}

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5. 更轻量级化

当前体积： 核心代码约2000行，依赖较少
进一步优化：

• 按需加载模块：
  

1. <bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />com.github.microwind<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />springwind-core<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />  com.github.microwind<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />springwind-web  

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• 移除不必要的依赖：
  

1. <bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />cglib<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />cglib<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />true  

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• GraalVM Native Image支持：
  编译成原生可执行文件，启动速度更快，内存占用更小。
  

6. 配置文件支持

当前状态： 主要依赖注解
改进方案：

1. # application.ymlspringwind:  datasource:<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />url: jdbc:mysql://localhost:3306/test<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />username: root<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />password: 123456  web:<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />port: 8080<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />context-path: /api

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1. // 读取配置@Configurationpublic class DataSourceConfig {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Value("${springwind.datasource.url}")<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />private String url;<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" />@Bean<bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />public DataSource dataSource() {<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />return new HikariDataSource(url, username, password);<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />}}

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7. 更好的异常处理

当前状态： 基本的异常抛出
改进方案：

1. // 全局异常处理器@ControllerAdvicepublic class GlobalExceptionHandler {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@ExceptionHandler(BeanNotFoundException.class)<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />public ViewResult handleBeanNotFound(BeanNotFoundException e) {<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />return new JsonResult(ApiResponse.notFound(e.getMessage()).toMap());<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" />}<bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />@ExceptionHandler(Exception.class)<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" />public ViewResult handleGenericException(Exception e) {<bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" /><bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" />return new JsonResult(ApiResponse.failure("系统错误: " + e.getMessage()).toMap());<bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />}}

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8. 性能监控和诊断

改进方案：

1. // Bean创建性能监控@Aspectpublic class BeanCreationMonitor {<bean id="userService" >
2.     <property name="userDao" ref="userDao"/>
3. </bean>
4. <bean id="userDao" />@Around("@annotation(Component)")<bean id="userService" >
5.     <property name="userDao" ref="userDao"/>
6. </bean>
7. <bean id="userDao" />public Object monitorBeanCreation(ProceedingJoinPoint pjp) {<bean id="userService" >
8.     <property name="userDao" ref="userDao"/>
9. </bean>
10. <bean id="userDao" /><bean id="userService" >
11.     <property name="userDao" ref="userDao"/>
12. </bean>
13. <bean id="userDao" />long start = System.currentTimeMillis();<bean id="userService" >
14.     <property name="userDao" ref="userDao"/>
15. </bean>
16. <bean id="userDao" /><bean id="userService" >
17.     <property name="userDao" ref="userDao"/>
18. </bean>
19. <bean id="userDao" />Object bean = pjp.proceed();<bean id="userService" >
20.     <property name="userDao" ref="userDao"/>
21. </bean>
22. <bean id="userDao" /><bean id="userService" >
23.     <property name="userDao" ref="userDao"/>
24. </bean>
25. <bean id="userDao" />long end = System.currentTimeMillis();<bean id="userService" >
26.     <property name="userDao" ref="userDao"/>
27. </bean>
28. <bean id="userDao" /><bean id="userService" >
29.     <property name="userDao" ref="userDao"/>
30. </bean>
31. <bean id="userDao" />System.out.println("创建Bean " + bean.getClass().getSimpleName() +<bean id="userService" >
32.     <property name="userDao" ref="userDao"/>
33. </bean>
34. <bean id="userDao" /><bean id="userService" >
35.     <property name="userDao" ref="userDao"/>
36. </bean>
37. <bean id="userDao" /><bean id="userService" >
38.     <property name="userDao" ref="userDao"/>
39. </bean>
40. <bean id="userDao" /><bean id="userService" >
41.     <property name="userDao" ref="userDao"/>
42. </bean>
43. <bean id="userDao" /><bean id="userService" >
44.     <property name="userDao" ref="userDao"/>
45. </bean>
46. <bean id="userDao" /><bean id="userService" >
47.     <property name="userDao" ref="userDao"/>
48. </bean>
49. <bean id="userDao" />  " 耗时: " + (end - start) + "ms");<bean id="userService" >
50.     <property name="userDao" ref="userDao"/>
51. </bean>
52. <bean id="userDao" /><bean id="userService" >
53.     <property name="userDao" ref="userDao"/>
54. </bean>
55. <bean id="userDao" />return bean;<bean id="userService" >
56.     <property name="userDao" ref="userDao"/>
57. </bean>
58. <bean id="userDao" />}}// 内存占用监控public class MemoryMonitor {<bean id="userService" >
59.     <property name="userDao" ref="userDao"/>
60. </bean>
61. <bean id="userDao" />public void printMemoryUsage() {<bean id="userService" >
62.     <property name="userDao" ref="userDao"/>
63. </bean>
64. <bean id="userDao" /><bean id="userService" >
65.     <property name="userDao" ref="userDao"/>
66. </bean>
67. <bean id="userDao" />Runtime runtime = Runtime.getRuntime();<bean id="userService" >
68.     <property name="userDao" ref="userDao"/>
69. </bean>
70. <bean id="userDao" /><bean id="userService" >
71.     <property name="userDao" ref="userDao"/>
72. </bean>
73. <bean id="userDao" />long usedMemory = runtime.totalMemory() - runtime.freeMemory();<bean id="userService" >
74.     <property name="userDao" ref="userDao"/>
75. </bean>
76. <bean id="userDao" /><bean id="userService" >
77.     <property name="userDao" ref="userDao"/>
78. </bean>
79. <bean id="userDao" />System.out.println("内存占用: " + (usedMemory / 1024 / 1024) + " MB");<bean id="userService" >
80.     <property name="userDao" ref="userDao"/>
81. </bean>
82. <bean id="userDao" />}}

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总结

通过从零实现SpringWind框架（~5000行代码），我们彻底搞懂了Spring的核心原理：
核心机制理解

• IoC容器：通过反射扫描组件、注册Bean定义、管理完整生命周期
  
  
  
  • 组件扫描：支持文件系统和JAR包中的类扫描
    
  • Bean注册：使用ConcurrentHashMap保证线程安全
    
  • 生命周期：从实例化到初始化到销毁的完整流程
    
  
  
• 依赖注入：通过反射实现自动装配，支持字段注入和方法注入
  
  
  
  • 类型匹配：根据字段类型自动查找Bean
    
  • 循环依赖：与三级缓存配合，优雅解决循环依赖问题
    
  
  
• 三级缓存（最精妙的设计）：
  
  
  
  • 一级缓存：存储完全初始化好的Bean
    
  • 二级缓存：存储早期Bean引用（已实例化但未初始化）
    
  • 三级缓存：存储ObjectFactory工厂（关键！）
    
  • 为什么需要三级：延迟生成早期引用，支持AOP提前创建代理，保证单例一致性
    
  
  
• AOP：通过动态代理实现横切关注点的分离
  
  
  
  • JDK动态代理：基于接口的代理
    
  • CGLIB代理：基于继承的字节码增强
    
  • SmartInstantiationAwareBeanPostProcessor：解决循环依赖+AOP的组合问题
    
  
  
• Web MVC：通过前端控制器模式统一处理HTTP请求
  
  
  
  • DispatcherServlet：统一入口
    
  • HandlerMapping：URL到方法的映射
    
  • 参数解析：支持@PathVariable、@RequestParam、@RequestBody
    
  
  
• JDBC模板：通过模板方法模式封装样板代码
  
  
  
  • 固定流程：连接管理、语句执行、结果映射、资源关闭
    
  • 灵活扩展：通过RowMapper实现不同的映射策略
    
  
  

学习价值

为了就是模仿，只有通过模仿完全手搓一个Web框架时，你才能彻底明白框架的核心机制。
SpringWind不是为了替代Spring，而是为了深入理解Spring。它用最简洁的代码（~3800行）实现了Spring的核心功能，让每个想深入理解框架原理的开发者都能看懂。
通过学习SpringWind，你将掌握Spring框架核心知识点：

• ✅ Spring IoC容器的工作机制
  
• ✅ 三级缓存解决循环依赖的精妙设计
  
• ✅ AOP动态代理的实现原理
  
• ✅ Bean生命周期的完整流程
  
• ✅ 设计模式在框架中的实际应用
  
• ✅ 为什么Spring要这样设计的深层原因
  

学习建议：

• 先跑起来：运行两个示例项目，看看效果
  
• 打断点调试：看Bean是怎么创建的，依赖是怎么注入的
  
• 阅读源码：SpringWind代码量不大，完全可以通读
  
• 对比Spring：理解SpringWind的简化设计和Spring的完整实现
  
• 动手改代码：实现待改进功能，加深理解
  

最后的话：
框架不是黑魔法，它只是把常见的代码模式封装起来。当你理解了原理，就能从"会用框架"进阶到"精通框架"，甚至"设计框架"。

希望SpringWind能帮你打开Spring的大门，祝你学习愉快！
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懂技术并乐意极积无私分享的人越来越少。珍惜

不错，里面软件多更新就更好了

谢谢楼主提供！