REST风格

  /user/1    get请求    获取用户

  /user/1  post请求    新增用户

  /user/1  put请求      更新用户

  /user/1  delete请求  删除用户

 

在Spring MVC中如何提交put和delete请求呢?

  需要在web.xml文件中配置一个HiddenHttpMethodFilter过滤器。该过滤过滤post请求,如果在post请求中有个一个_method参数,那么_method参数值就是请求方式。所以在jsp页面可以这样写

 1 <a href="user/1">GET请求</a>
 2 
 3 <form action="user/1" method="post">
 4     <input type="submit" value="POST请求"/>
 5 </form>
 6 
 7 <form action="user/1" method="post">
 8     <input type="hidden" name="_method" value="PUT">
 9     <input type="submit" value="PUT请求"/>
10 </form>
11 
12 <form action="user/1" method="post">
13     <input type="hidden" name="_method" value="DELETE">
14     <input type="submit" value="DELET请求"/>
15 </form> 

 

  web.xml配置过滤器

1 <filter>
2     <filter-name>methodFilter</filter-name>
3     <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
4 </filter>
5 
6 <filter-mapping>
7     <filter-name>methodFilter</filter-name>
8     <url-pattern>/*</url-pattern>
9 </filter-mapping>

 

  控制器

 1 package com.proc;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.PathVariable;
 5 import org.springframework.web.bind.annotation.RequestMapping;
 6 import org.springframework.web.bind.annotation.RequestMethod;
 7 
 8 @Controller
 9 public class User {
10 
11     @RequestMapping(value="user/{id}",method=RequestMethod.GET)
12     public String get(@PathVariable("id") Integer id){
13         System.out.println("获取用户:"+id);
14         return "hello";
15     }
16     
17     @RequestMapping(value="user/{id}",method=RequestMethod.POST)
18     public String post(@PathVariable("id") Integer id){
19         System.out.println("添加用户:"+id);
20         return "hello";
21     }
22     
23     @RequestMapping(value="user/{id}",method=RequestMethod.PUT)
24     public String put(@PathVariable("id") Integer id){
25         System.out.println("更新用户:"+id);
26         return "hello";
27     }
28     
29     @RequestMapping(value="user/{id}",method=RequestMethod.DELETE)
30     public String delete(@PathVariable("id") Integer id){
31         System.out.println("删除用户:"+id);
32         return "hello";
33     }
34 }

 

  我们一次点击GET请求、POST请求、PUT请求和DELETE请求

获取用户:1
添加用户:1
更新用户:1
删除用户:1

 

【总结】:发出PUT请求和DELET请求的步骤

  1、在发出请求时必须是POST请求

  2、在POST请求中添加一个名为_method的参数,其值用来指定是PUT请求还是DELETE请求

  3、配置HiddenHttpMethodFilter过滤器。该过滤器的作用是POST请求可以转换成PUT或DELET请求

 

  

 posted on 2016-07-02 14:41  Just_Do  阅读(997)  评论(0编辑  收藏  举报