SpringMvc中获取@PathVariable的值的方式

一、地址：**/{id}

@RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
public void del(HttpServletRequest request, @PathVariable("id") Long id){
   System.out.println(id);
}

二、方式

    1、直接通过@PathVariable注解获取

    @RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
    public void del(HttpServletRequest request, @PathVariable("id") Long id){
       System.out.println(id);
    }

    2、通用@PathVariable注解批量获取, 只有注解的参数才能得到

   @RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
   public void del(HttpServletRequest request, @PathVariable("id") Long id){
        NativeWebRequest webRequest = new ServletWebRequest(request);
        Map map = (Map) webRequest.getAttribute(View.PATH_VARIABLES, RequestAttributes.SCOPE_REQUEST);
        System.out.println(map.get("id"));
  }

    3、批量获取，不需要任何注解

  @RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
  public void del(HttpServletRequest request){
       NativeWebRequest webRequest = new ServletWebRequest(request);
       Map map = (Map) webRequest.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, RequestAttributes.SCOPE_REQUEST);
       System.out.println(map.get("id"));
  }