HiddenHttpMethodFilter进行请求过滤,实现Rest风格的url

         Rest 风格的 URL. 
         以 CRUD 为例: 
         新增: /order POST 
         修改: /order/1 PUT update?id=1 
         获取:/order/1 GET get?id=1 
         删除: /order/1 DELETE delete?id=1、

浏览器只支持Post和get的方式,想要实现delete和put的方式,需要使用过滤器HiddenHttpMethodFilter

1,配置过滤器
HiddenHttpMethodFilter进行请求过滤
 <filter>
        <filter-name>hidden</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>hidden</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
HiddenHttpMethodFilter进行请求过滤

2,在客户端发起请求

过滤器使用_method的这个参数来决定过滤成是什么类型的,因此,需要在前端的提交表单里面加上_method的隐藏域,注意要使用post方法进行提交

HiddenHttpMethodFilter进行请求过滤
 <form action="/rest/12" method="post">
    <input type="hidden" name="_method" value="DELETE">
    <input type="submit" value="delete">
  </form>
  <form action="/rest/12" method="post">
    <input type="hidden" name="_method" value="PUT">
    <input type="submit" value="put">
  </form>
  <form action="/rest/12" method="post">
    <input type="submit" value="post">
  </form>
  <form action="/rest/12" method="get">
    <input type="submit" value="get">
  </form>
HiddenHttpMethodFilter进行请求过滤

3,后端控制器的编写

控制器直接使用RequestMapping来指定方法就可以了

HiddenHttpMethodFilter进行请求过滤
@RequestMapping(value = "/rest/{id}",method = RequestMethod.DELETE)
    public String testrestDELETE(@PathVariable int id, Model model){
        model.addAttribute("msg","delete请求"+id);
        return SUCCESS;
    }
    @RequestMapping(value = "/rest/{id}",method = RequestMethod.PUT)
    public String testrestPUT(@PathVariable int id,Model model){
        model.addAttribute("msg","put请求"+id);
        return SUCCESS;
    }
    @RequestMapping(value = "/rest/{id}",method = RequestMethod.POST)
    public String testrestPOST(@PathVariable int id,Model model){
        model.addAttribute("msg","post请求"+id);
        return  SUCCESS;

    }
    @RequestMapping(value = "/rest/{id}",method = RequestMethod.GET)
    public String testrestDELETE(@PathVariable int id, ModelMap modelMap){
        modelMap.addAttribute("msg","get请求"+id);
        return SUCCESS;
    }
HiddenHttpMethodFilter进行请求过滤

特别注意!!!!!!!!!!!!!

在tomcat8上面是不支持delete和post请求的,因此以上只能在tomcat7上面执行

tomcat8运行时可以进入到相应的控制器,但是视图渲染返回的时候,由于不支持这两种方法,就会报出异常页面

HiddenHttpMethodFilter进行请求过滤


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