@Controller注解

╰+哭是因爲堅強的太久メ 2022-09-30 11:49 131阅读 0赞

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****>**ControllerTest**</****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. **<****context:component-scan**base-package="org.fkit.controller"**/>**
15. 
16. **<****bean**id="viewResolver"
17. class="org.springframework.web.servlet.view.InternalResourceViewResolver"**>**
18. 
19. **<****property**name="prefix"**>**
20. **<****value****>**/WEB-INF/content/**</****value****>**
21. **</****property****>**
22. 
23. **<****property**name="suffix"**>**
24. **<****value****>**.jsp**</****value****>**
25. **</****property****>**
26. **</****bean****>**
27. **</****beans****>**
28.

3.HelloWorldController类的实现（@Controller注解的使用）

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1.  **package** org.fkit.controller; 
2.  
3.  **import** org.springframework.stereotype.Controller; 
4.  **import** org.springframework.ui.Model; 
5.  **import** org.springframework.web.bind.annotation.RequestMapping; 
6.  /\*
7.   \* HelloWorldController是一个基于注解的控制器,
8.   \* 可以同时处理多个请求动作，并且无须实现任何接口。
9.   \* org.springframework.stereotype.Controller注解用于指示该类是一个控制器
10.  \*/
11. @Controller
12. **public****class** HelloWorldController\{ 
13. @RequestMapping("/helloWorld") 
14. **public** String helloWorld(Model model) \{ 
15. //本例在model中添加了一个名为"message"的字符串对象，该对象可以在返回的视图当中通过request对象获取。最后，方法返回一个字符串"helloWorld"作为视图名称
16.  model.addAttribute("message", "Hello World!"); 
17. **return**"helloWorld"; 
18.  \} 
19. 
20. \}

4.View界面(helloWorld.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@Controller注解**</****title****>**
7.  **</****head****>**
8.  **<****body****>**
9.  
10. $\{requestScope.message\} 
11. **</****body****>**
12. **</****html****>**

5.截图

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[view plain]: http://blog.csdn.net/haige_lin/article/details/64439635#
[Center]: /images/20220706/72a6bb72161e4c189fa1468861ba93ea.png