1、HiddenHttpMethodFilter过滤器的作用
浏览器form表单只支持GET与POST请求,而DELETE、PUT等method并不支持,Spring3.0添加了一个过滤器,可以将这些请求转换为标准的http方法,使得支持GET、POST、PUT与DELETE请求。
2、REST风格示例
/order/1 HTTP GET: 得到 id=1的 order
/order/1 HTTP DELETE: 删除 id=1的 order
/order/1 HTTP PUT: 更新id=1的 order
/order HTTP POST: 新增order
3、在web.xml文件中添加过滤器HiddenHttpMethodFilter
<!-- 配置HiddenHttpMethodFilter过滤器可以把POST请求转为DELETE或PUT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>
4、控制器TestRequestMappingController.java
package com.springmvc.web.controller; 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 TestRequestMappingController { @RequestMapping(value = "/testRest/{id}", method = RequestMethod.PUT) public String testRestPut(@PathVariable Integer id) { System.out.println("testRest Put: " + id); return "success"; } @RequestMapping(value = "/testRest/{id}", method = RequestMethod.DELETE) public String testRestDelete(@PathVariable Integer id) { System.out.println("testRest Delete: " + id); return "success"; } @RequestMapping(value = "/testRest", method = RequestMethod.POST) public String testRest() { System.out.println("testRest POST"); return "success"; } @RequestMapping(value = "/testRest/{id}", method = RequestMethod.GET) public String testRest(@PathVariable Integer id) { System.out.println("testRest GET: " + id); return "success"; } }
5、访问代码
<form action="<%=path%>/springmvc/testRest/1" method="post"> <input type="hidden" name="_method" value="PUT"/> <input type="submit" value="Test Rest PUT" /> </form> <form action="<%=path%>/springmvc/testRest/1" method="post"> <input type="hidden" name="_method" value="DELETE"/> <input type="submit" value="Test Rest DELETE" /> </form> <form action="<%=path%>/springmvc/testRest" method="post"> <input type="submit" value="Test Rest POST" /> </form> <a href="<%=path%>/springmvc/testRest/1">Test Rest GET</a>