@RequestBody如何接受前端参数

@RequestBody如何接受前端参数：需要将json字符串转成json对象，然后不要误解params这个参数！自己好好理解一下

  function saveAjax(){
        console.log(JSON.stringify(obj));
        $.ajax({
            type: "POST",
            url: "http://localhost:8080/addMenu2",
            contentType:"application/json;charset=utf-8",
            processData : false,
            data : JSON.stringify({"name":"gwm","pwd":"12334"}),
            success : function(msg) {
                alert("返回的数据"+msg);
            }
        });
    }

 /**
     * 添加菜单
     *
     * @param params id,remark
     * @throws IOException
     */
    @PostMapping(value = "addMenu2")
    public String addMenu2(@RequestBody Map params) {
        System.out.println("params="+params);
        //成功的信息,查询出来最新的菜单然后调用为微信的接口进行开发
        try {
            //SecurityKit.menuToWeixinServer(params);
        } catch (Exception e) {
            return ResponseResult.rtnFailed("添加失败!插入微信失败");
        }
        return null;
    }