@RequestBody注解传对象

需要用JSON.stringify()将数据序列化成 一个JSON 字符串的值。
“contentType”: ‘application/json;charset=UTF-8’ ，
“dataType” : “json”,

$.ajax({
      "url": "http://localhost/system/menu/demo",
      "type":"post",
      "dataType" : "json",
      "contentType": 'application/json;charset=UTF-8',
      "data": JSON.stringify({
          "resourceName": "deeoo",
          "resourceId": "ddddd"
     }),
     "success": function (data) {
         alert(data)
     }
});