@RequestMapping注解

Love The Way You Lie 2022-09-30 11:49 153阅读 0赞

该项目的整体文件图：

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\------>项目源码：[百度网盘极速下载][Link 1]

1.在Web.xml中配置前端控制器DispatcherServlet

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1.  **<?****xml**version="1.0"encoding="UTF-8"**?>**
2.  **<****web-app**xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://xmlns.jcp.org/xml/ns/javaee"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app\_3\_1.xsd"id="WebApp\_ID"version="3.1"**>**
3.  **<****display-name****>**ModelTest**</****display-name****>**
4.  
5.  **<****servlet****>**
6.  **<****servlet-name****>**springmvc**</****servlet-name****>**
7.  **<****servlet-class****>**
8.   org.springframework.web.servlet.DispatcherServlet 
9.  **</****servlet-class****>**
10. **<****init-param****>**
11. **<****param-name****>**contextConfigLocation**</****param-name****>**
12. **<****param-value****>**/WEB-INF/springmvc-config.xml**</****param-value****>**
13. **</****init-param****>**
14. **<****load-on-startup****>**1**</****load-on-startup****>**
15. **</****servlet****>**
16. 
17. **<****servlet-mapping****>**
18. **<****servlet-name****>**springmvc**</****servlet-name****>**
19. **<****url-pattern****>**/**</****url-pattern****>**
20. **</****servlet-mapping****>**
21. 
22. **<****filter****>**
23. **<****filter-name****>**characterEncodingFilter**</****filter-name****>**
24. **<****filter-class****>**org.springframework.web.filter.CharacterEncodingFilter**</****filter-class****>**
25. **<****init-param****>**
26. **<****param-name****>**encoding**</****param-name****>**
27. **<****param-value****>**UTF-8**</****param-value****>**
28. **</****init-param****>**
29. **</****filter****>**
30. **<****filter-mapping****>**
31. **<****filter-name****>**characterEncodingFilter**</****filter-name****>**
32. **<****url-pattern****>**/\***</****url-pattern****>**
33. **</****filter-mapping****>**
34. **</****web-app****>**

2.配置Spring MVC的Controller

springmvc-config.xml

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1.  **<?****xml**version="1.0"encoding="UTF-8"**?>**
2.  **<****beans**xmlns="http://www.springframework.org/schema/beans"
3.  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.  xmlns:mvc="http://www.springframework.org/schema/mvc"
5.  xmlns:context="http://www.springframework.org/schema/context"
6.  xsi:schemaLocation=" 
7.   http://www.springframework.org/schema/beans 
8.   http://www.springframework.org/schema/beans/spring-beans-4.2.xsd 
9.   http://www.springframework.org/schema/mvc 
10.  http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd 
11.  http://www.springframework.org/schema/context 
12.  http://www.springframework.org/schema/context/spring-context-4.2.xsd"**>**
13. 
14. 
15. **<****context:component-scan**base-package="org.fkit.controller"**/>**
16. 
17. 
18. **<****bean**id="viewResolver"class="org.springframework.web.servlet.view.InternalResourceViewResolver"**>**
19. 
20. **<****property**name="prefix"**>**
21. **<****value****>**/WEB-INF/content/**</****value****>**
22. **</****property****>**
23. 
24. **<****property**name="suffix"**>**
25. **<****value****>**.jsp**</****value****>**
26. **</****property****>**
27. **</****bean****>**
28. **</****beans****>**
29.

3.前端页面（View）

index.jsp

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loginForm1.jsp

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1.  **<**%@ page language="java"contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%**>**
2.  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"**>**
3.  **<****html****>**
4.  **<****head****>**
5.  **<****meta**http-equiv="Content-Type"content="text/html; charset=UTF-8"**>**
6.  **<****title****>**测试Model**</****title****>**
7.  **</****head****>**
8.  **<****body****>**
9.  **<****h3****>**测试Model**</****h3****>**
10. **<****form**action="login1"method="post"**>**
11. **<****table****>**
12. **<****tr****>**
13. **<****td****>****<****label****>**登录名: **</****label****>****</****td****>**
14. **<****td****>****<****input**type="text"id="loginname"name="loginname"**>****</****td****>**
15. **</****tr****>**
16. **<****tr****>**
17. **<****td****>****<****label****>**密码: **</****label****>****</****td****>**
18. **<****td****>****<****input**type="password"id="password"name="password"**>****</****td****>**
19. **</****tr****>**
20. **<****tr****>**
21. **<****td****>****<****input**id="submit"type="submit"value="登录"**>****</****td****>**
22. **</****tr****>**
23. **</****table****>**
24. **</****form****>**
25. **</****body****>**
26. **</****html****>**

loginForm2.jsp

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1.  **<**%@ page language="java"contentType="text/html; charset=UTF-8"
2.  pageEncoding="UTF-8"%**>**
3.  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"**>**
4.  **<****html****>**
5.  **<****head****>**
6.  **<****meta**http-equiv="Content-Type"content="text/html; charset=UTF-8"**>**
7.  **<****title****>**测试ModelMap**</****title****>**
8.  **</****head****>**
9.  **<****body****>**
10. **<****h3****>**测试ModelMap**</****h3****>**
11. **<****form**action="login2"method="post"**>**
12. **<****table****>**
13. **<****tr****>**
14. **<****td****>****<****label****>**登录名: **</****label****>****</****td****>**
15. **<****td****>****<****input**type="text"id="loginname"name="loginname"**>****</****td****>**
16. **</****tr****>**
17. **<****tr****>**
18. **<****td****>****<****label****>**密码: **</****label****>****</****td****>**
19. **<****td****>****<****input**type="password"id="password"name="password"**>****</****td****>**
20. **</****tr****>**
21. **<****tr****>**
22. **<****td****>****<****input**id="submit"type="submit"value="登录"**>****</****td****>**
23. **</****tr****>**
24. **</****table****>**
25. **</****form****>**
26. **</****body****>**
27. **</****html****>**

loginForm3.jsp

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1.  **<**%@ page language="java"contentType="text/html; charset=UTF-8"
2.  pageEncoding="UTF-8"%**>**
3.  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"**>**
4.  **<****html****>**
5.  **<****head****>**
6.  **<****meta**http-equiv="Content-Type"content="text/html; charset=UTF-8"**>**
7.  **<****title****>**测试ModelAndView**</****title****>**
8.  **</****head****>**
9.  **<****body****>**
10. **<****h3****>**测试ModelAndView**</****h3****>**
11. **<****form**action="login3"method="post"**>**
12. **<****table****>**
13. **<****tr****>**
14. **<****td****>****<****label****>**登录名: **</****label****>****</****td****>**
15. **<****td****>****<****input**type="text"id="loginname"name="loginname"**>****</****td****>**
16. **</****tr****>**
17. **<****tr****>**
18. **<****td****>****<****label****>**密码: **</****label****>****</****td****>**
19. **<****td****>****<****input**type="password"id="password"name="password"**>****</****td****>**
20. **</****tr****>**
21. **<****tr****>**
22. **<****td****>****<****input**id="submit"type="submit"value="登录"**>****</****td****>**
23. **</****tr****>**
24. **</****table****>**
25. **</****form****>**
26. **</****body****>**
27. **</****html****>**

result1.jsp

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result2.jsp

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result3.jsp

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4.后端部分

User.[Java][]

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1.  **package** org.fkit.domain; 
2.  
3.  **import** java.io.Serializable; 
4.  
5.  //域对象，实现序列化接口
6.  **public****class** User **implements** Serializable \{ 
7.  **private** String loginname; 
8.  **private** String password; 
9.  **private** String username; 
10. **public** User() \{ 
11. **super**(); 
12. // TODO Auto-generated constructor stub
13.  \} 
14. **public** User(String loginname, String password, String username) \{ 
15. **super**(); 
16. **this**.loginname = loginname; 
17. **this**.password = password; 
18. **this**.username = username; 
19.  \} 
20. **public** String getLoginname() \{ 
21. **return** loginname; 
22.  \} 
23. **public****void** setLoginname(String loginname) \{ 
24. **this**.loginname = loginname; 
25.  \} 
26. **public** String getPassword() \{ 
27. **return** password; 
28.  \} 
29. **public****void** setPassword(String password) \{ 
30. **this**.password = password; 
31.  \} 
32. **public** String getUsername() \{ 
33. **return** username; 
34.  \} 
35. **public****void** setUsername(String username) \{ 
36. **this**.username = username; 
37.  \} 
38. @Override
39. **public** String toString() \{ 
40. // TODO Auto-generated method stub
41. **return**"User \[loginname=" \+ loginname + ", password=" \+ password + ", username=" \+ username + "\]"; 
42.  \} 
43. \}

FormController.java

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1.  **package** org.fkit.controller; 
2.  
3.  **import** org.springframework.stereotype.Controller; 
4.  **import** org.springframework.web.bind.annotation.PathVariable; 
5.  **import** org.springframework.web.bind.annotation.RequestMapping; 
6.  
7.  // Controller注解用于指示该类是一个控制器，可以同时处理多个请求动作
8.  @Controller
9.  **public****class** FormController\{ 
10. 
11. @RequestMapping(value="/\{formName\}") 
12. **public** String loginForm(@PathVariable String formName)//处理请求路径的注解
13.  \{ 
14. // 动态跳转页面
15. **return** formName; 
16.  \} 
17. 
18. \}

User1Controller.java

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1.  **package** org.fkit.controller; 
2.  **import** org.apache.commons.logging.Log; 
3.  **import** org.apache.commons.logging.LogFactory; 
4.  **import** org.fkit.domain.User; 
5.  **import** org.springframework.stereotype.Controller; 
6.  **import** org.springframework.ui.Model; 
7.  **import** org.springframework.web.bind.annotation.ModelAttribute; 
8.  **import** org.springframework.web.bind.annotation.RequestMapping; 
9.  
10. //Controller注解用于指示该类是一个控制器，可以同时处理多个请求动作
11. @Controller
12. **public****class** User1Controller \{ 
13. 
14. **private****static****final** Log logger = LogFactory.getLog(User1Controller.**class**); 
15. // @ModelAttribute修饰的方法会先于login调用，该方法用于接收前台jsp页面传入的参数
16. @ModelAttribute
17. **public****void** userModel(String loginname,String password,Model model)\{ 
18.  logger.info("userModel"); 
19. // 创建User对象存储jsp页面传入的参数
20.  User user=**new** User(); 
21.  user.setLoginname(loginname); 
22.  user.setPassword(password); 
23. // 将User对象添加到Model当中
24.  model.addAttribute("user", user); 
25.  \} 
26. 
27. /\*
28.  \* Model的使用，可以向方法中的Model添加对象
29.  \*/
30. @RequestMapping(value="/login1") 
31. **public** String login(Model model)\{ 
32.  logger.info("login"); 
33. // 从Model当中取出之前存入的名为user的对象
34.  User user=(User) model.asMap().get("user"); 
35.  System.out.println(user); 
36. // 设置user对象的username属性
37.  user.setUsername("测试"); 
38. **return**"result1"; 
39.  \} 
40. 
41. \}

User2Controller.java

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1.  **package** org.fkit.controller; 
2.  
3.  **import** org.apache.commons.logging.Log; 
4.  **import** org.apache.commons.logging.LogFactory; 
5.  **import** org.fkit.domain.User; 
6.  **import** org.springframework.stereotype.Controller; 
7.  **import** org.springframework.ui.ModelMap; 
8.  **import** org.springframework.web.bind.annotation.ModelAttribute; 
9.  **import** org.springframework.web.bind.annotation.RequestMapping; 
10. 
11. // Controller注解用于指示该类是一个控制器，可以同时处理多个请求动作
12. @Controller
13. **public****class** User2Controller\{ 
14. **private****static****final** Log logger = LogFactory.getLog(User2Controller.**class**); 
15. 
16. @ModelAttribute
17. **public****void** userMode2(String loginname,String password, 
18.  ModelMap modelMap)\{ 
19.  logger.info("userMode2"); 
20. // 创建User对象存储jsp页面传入的参数
21.  User user = **new** User(); 
22.  user.setLoginname(loginname); 
23.  user.setPassword(password); 
24. // 将User对象添加到ModelMap当中
25.  modelMap.addAttribute("user", user); 
26.  \} 
27. /\*
28.  \* ModelMap的使用，都是往方法里添加对象
29.  \*/
30. @RequestMapping(value="/login2") 
31. **public** String login2(ModelMap modelMap)\{ 
32.  logger.info("login2"); 
33. // 从ModelMap当中取出之前存入的名为user的对象
34.  User user = (User) modelMap.get("user"); 
35.  System.out.println(user); 
36. // 设置user对象的username属性
37.  user.setUsername("测试"); 
38. **return**"result2"; 
39.  \} 
40. 
41. 
42. 
43. \}

User3Controller.java

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1.  **package** org.fkit.controller; 
2.  
3.  **import** org.apache.commons.logging.Log; 
4.  **import** org.apache.commons.logging.LogFactory; 
5.  **import** org.fkit.domain.User; 
6.  **import** org.springframework.stereotype.Controller; 
7.  **import** org.springframework.web.bind.annotation.ModelAttribute; 
8.  **import** org.springframework.web.bind.annotation.RequestMapping; 
9.  **import** org.springframework.web.servlet.ModelAndView; 
10. 
11. //Controller注解用于指示该类是一个控制器，可以同时处理多个请求动作
12. @Controller
13. **public****class** User3Controller \{ 
14. 
15. **private****static****final** Log logger = LogFactory.getLog(User3Controller.**class**); 
16. 
17. @ModelAttribute
18. **public****void** userModel3(String loginname,String password,ModelAndView mv)\{ 
19.  logger.info("userMode3"); 
20.  User user = **new** User(); 
21.  user.setLoginname(loginname); 
22.  user.setPassword(password); 
23. // 将User对象添加到ModelAndView的Model当中
24.  mv.addObject("user", user); 
25.  \} 
26. 
27. /\*
28.  \* ModelAndView的使用，其返回值即包含模型数据信息，也包含视图信息，其代码功能和Model基本一致
29.  \*/
30. @RequestMapping(value="/login3") 
31. **public** ModelAndView login3(ModelAndView mv)\{ 
32. // 从ModelAndView的Model当中取出之前存入的名为user的对象
33.  User user=(User) mv.getModel().get("user"); 
34.  System.out.println(user); 
35. // 设置user对象的username属性
36.  user.setUsername("测试"); 
37. // 设置返回的视图名称
38.  mv.setViewName("result3"); 
39. **return** mv; 
40.  \} 
41. \}

运行截图：

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[Center]: /images/20220706/0f877bb9aa5e4226aa9cb96a8bb4b592.png
[Link 1]: http://pan.baidu.com/s/1c2IL1uS
[view plain]: http://blog.csdn.net/haige_lin/article/details/64444416#
[Java]: http://lib.csdn.net/base/javase
[Center 1]: /images/20220706/f91722bdf4664704b88ca5cdef742f87.png
[Center 2]: /images/20220706/d21f1546d5454695af68416df720d36a.png
[Center 3]: /images/20220706/a10af91e241b4fcf8f9bff14bdeb2c6c.png
[Center 4]: /images/20220706/c006e06d23d04fcaadc6a531fa9b3ce3.png
[Center 5]: /images/20220706/f134f66bb7f5487baab7bea53619a598.png
[Center 6]: /images/20220706/50d449ceb5474724925498994f7b166d.png