JS的Ajax与后端交互数据的实例

$.ajax({
    type: "post",
    url: "http://localhost:8080/ccnb/user/login",
    data: {
     "telephone": login_name,
     "password": login_password
    },
    dataType: "json",
//   contentType:'application/json',
    success: function (data) {
     alert(data.Flag);
     alert(data.Msg);
 
     }
 
    },
    error: function ( HttpRequest, textStatus, errorThrown) {
     alert( HttpRequest.status);
     alert( HttpRequest.readyState);
     alert(textStatus);
    },
   });