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

HiddenHttpMethodFilter:
浏览器form表单只支持GET,POST请求，而DELETE，PUT等method并不支持，Spring3.0添加了一个过滤器，可以把POST请求转为DELETE,PUT请求使得支持GET,POST,PUT,DELETE请求；

步骤：

1. web.xml中添加HiddenHttpMethodFilter

<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. 前端表单添加隐藏域

    <form action="springmvc/testRest/1" method="post">
        <input type="hidden" name="_method" value="DELETE">
        <button type="submit">testRest-DELETE</button>
    </form><br>
    
    <form action="springmvc/testRest/2" method="post">
        <input type="hidden" name="_method" value="PUT">
        <button type="submit">testRest-PUT</button>
    </form><br>
    
    <form action="springmvc/testRest/3" method="post">
        <button type="submit">testRest-POST</button>
    </form><br>
    
    <a href="springmvc/testRest/4">testRest-GET</a>

3. 类

public class Rest {
    private String SUCCESS = "success";
    
    @RequestMapping(value="/testRest/{id}",method=RequestMethod.DELETE)
    public String testRest_delete(@PathVariable("id") Integer id){
        System.out.println("删除成功："+id);
        return SUCCESS;
    }
    
    @RequestMapping(value="/testRest/{id}",method=RequestMethod.PUT)
    public String testRest_put(@PathVariable("id") Integer id){
        System.out.println("更新成功："+id);
        return SUCCESS;
    }
    
    @RequestMapping(value="/testRest/{id}",method=RequestMethod.POST)
    public String testRest_post(@PathVariable("id") Integer id){
        System.out.println("添加成功："+id);
        return SUCCESS;
    }
    
    @RequestMapping(value="/testRest/{id}",method=RequestMethod.GET)
    public String testRest_get(@PathVariable("id") Integer id){
        System.out.println("获取成功："+id);
        return SUCCESS;
    }
}