HiddernHttpMethodFilter

HiddernHttpMethodFilter:浏览器表单只支持GET与POST请求，而DELETE、PUT等method并不支持，Spring3.0添加了一个过滤器，可以将这些请求转发为标砖的http方法，支持GET、POST、PUT、DELETE请求
1.在web.xml中配置

  <!--配置org.springframework.web.filter.HiddenHttpMethodFilter 可以把POST请求转换为DELETE或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>

2index.jsp中加入下面

<%--HiddenHttpMethodFilter--%>

<form action="controller/testRest/1" method="post">
    <input type="hidden" name="_method" value="DELETE">
    <input type="submit" value="TestRest DELETE">
</form>
<br><br>

<form action="controller/testRest/1" method="post">
    <input type="hidden" name="_method" value="PUT">
    <input type="submit" value="TestRest PUT">
</form>
<br><br>

<form action="controller/testRest" method="post">
    <input type="submit" value="TestRest POST">
</form>

<a href="controller/testRest/1">Test Rest Get</a>

3.在HelloContoller

  @RequestMapping(value = "/testRest/{id}", method = RequestMethod.GET)
  public String testRestGet(@PathVariable("id") Integer id) {
    System.out.printf("testRest GET:------>" + id);
    return "Hello";
  }

  @RequestMapping(value = "/testRest", method = RequestMethod.POST)
  public String testRestPost() {
    System.out.println("testRest POST");
    return "Hello";
  }

 //出现HTTP Status 405 - JSPs only permit GET POST or HEAD.  tomcat8  bug
  @RequestMapping(value = "/testRest/{id}", method = RequestMethod.DELETE)
  public String testRestDelete(@PathVariable("id") Integer id) {
    System.out.printf("testRest delete");
    return "Hello";
  }
  //出现HTTP Status 405 - JSPs only permit GET POST or HEAD.  tomcat8  bug
  @RequestMapping(value = "/testRest/{id}", method = RequestMethod.PUT)
  public String testRestPut(@PathVariable("id") Integer id) {
    System.out.printf("testRest put");
    return "Hello";
  }

Rest风格的URL

已CURD为例：
新增： /order POST
修改：/order/1 PUIT update?id =1
获取：/order/1 GET get?id = 1
删除：/order/1 DELETE delete?id = 1
如何发送PUT请求和DELETE请求
1.配置HiddenHttpMethodFilter
2.需要发送POST请求
3.需要在发送POST请求时携带一个name="_method"的隐藏域， 值为DELETE或PUT
在SPringMVC的目标方法中如何得到id呢：使用@PathVariable注解

源码：https://github.com/gurongkang/TestSpringMVC.git tag:4