SpringMVC中REST介绍以及如何实现REST请求

1、Springmvc提供了一个filter，可以把delete请求和put请求转化成post请求。在web.xml中配置过滤器：org.sprin爿讥旌护gframework.web.filter.HiddenHttpMethodFilter：<!-- 可以把POST请求转为为DELETE或者POST请求 --> <filter> <filter-name>HiddenHttpMethodFilter</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>HiddenHttpMethodFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

2、发送一个get请求：<h2> <a href="springmvc/helloworld/1">Test Rest GET</a></h2>

3、发送一个post请求：<form action="springmvc/helloworld/1" method="post"> <input type="submit" value="Test REST POST"/></form>

4、发送一个put请求，发送put请求的时候，我们需求添加一个隐藏域。<form action="springmvc/helloworld/1" method="post"> <input type="hidden" name="_method" value="PUT" /> <input type="submit" value="Test REST PUT"/></form>

5、发送一个DELETE请求，发送DELETE请求的时候，我们需求添加一个隐藏域。 <input type="hidden" name="_method" value="DELETE" /><form action="springmvc/helloworld/1" method="post"> <input type="hidden" name="_method" value="DELETE" /> <input type="submit" value="Test REST DELETE"/></form>

6、springmvc控制层的代码如下如下：package com.gwolf.springmvc.handlers;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;@Controller@RequestMapping("/springmvc")public class HelloWorldController { @RequestMapping(value="/helloworld/{id}",method=RequestMethod.GET) public String hello(@PathVariable Integer id) { System.out.println("test rest get:" + id); return "success"; } @RequestMapping(value="/helloworld",method=RequestMethod.POST) public String hello() { System.out.println("test POST:" ); return "success"; } @RequestMapping(value="/helloworld/{id}",method=RequestMethod.DELETE) public String helloDelete(@PathVariable Integer id) { System.out.println("test rest delete:" + id); return "success"; } @RequestMapping(value="/helloworld/{id}",method=RequestMethod.PUT) public String helloPUt(@PathVariable Integer id) { System.out.println("test rest put:" + id); return "success"; }}

7、运行tomcat，查看各个请求是否正确相应：