springmvc实现REST中的GET、POST、PUT和DELETE

spring mvc 支持REST风格的请求方法,GET、POST、PUT和DELETE四种请求方法分别代表了数据库CRUD中的select、insert、update、delete,下面演示一个简单的REST实现过程。

参照http://blog.csdn.net/u011403655/article/details/44571287创建一个spring mvc工程

创建一个包,命名为me.elin.rest,添加一个RESTMethod类,代码如下

 1 package me.elin.rect;
 2 import org.springframework.stereotype.Controller;
 3 import org.springframework.web.bind.annotation.RequestMapping;
 4 import org.springframework.web.bind.annotation.RequestMethod;
 5 import org.springframework.web.bind.annotation.RequestParam;
 6 @Controller
 7 @RequestMapping("/rest")
 8 public class RESTMethod {
 9     private static final String SUCCESS = "success";
10     // 该方法接受POST传值,请求url为/rest/restPost
11     @RequestMapping(value = "restPost", method = RequestMethod.POST)
12     public String restPost(@RequestParam(value = "id") Integer id) {
13         System.out.println("POST ID:" + id);
14         return SUCCESS;
15     }
16     // 该方法接受GET传值,请求url为/rest/restGet
17     @RequestMapping(value = "/restGet", method = RequestMethod.GET)
18     public String restGet(@RequestParam(value = "id") Integer id) {
19         System.out.println("GET ID:" + id);
20         return SUCCESS;
21     }
22     // 该方法接受PUT传值,请求url为/rest/restPut
23     @RequestMapping(value = "/restPut", method = RequestMethod.PUT)
24     public String restPut(@RequestParam(value = "id") Integer id) {
25         System.out.println("PUT ID:" + id);
26         return SUCCESS;
27     }
28     // 该方法接受DELETE传值,请求url为/rest/restDelete
29     @RequestMapping(value="/restDelete",method=RequestMethod.DELETE)
30     public String restDelete(@RequestParam(value = "id") Integer id) {
31         System.out.println("DELETE ID:" + id);
32         return SUCCESS;
33     }
34 }

在web.xml中添加一个filter,用来过滤rest中的方法。代码如下

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

在WebContent下创建index.jsp文件,添加如下内容

 1 <a href="rest/restGet?id=1">发送GET请求</a>
 2 <form action="rest/restPost" method="post">
 3     <input type="text" name="id" value="2"/>
 4     <input type="submit" value="发送POST请求"/>
 5 </form>
 6 <form action="rest/restPut" method="post">
 7     <input type="hidden" name="_method" value="PUT">
 8     <input type="text" name="id" value="3">
 9     <input type="submit" value="发送PUT请求">
10 </form>
11 <form action="rest/restDelete" method="post">
12     <input type="hidden" name="_method" value="DELETE">
13     <input type="text" name="id" value="4">
14     <input type="submit" value="发送DELETE请求">
15 </form>

其中get和post方法是html中自带的,但是不支持PUT和DELETE方法,所以需要通过POST方法模拟这两种方法,只需要在表单中添加一个隐藏域,名为_method,值为PUT或DELETE。
运行程序,index.jsp中一个超链接和三个表单分别表示了四种请求方法。

原文地址:https://www.cnblogs.com/UniqueColor/p/5788763.html