jQuery接受后台传递的List

后台代码：

@RequestMapping(params = "getUser")@ResponseBodypublic List<User>  getUser(){List<User> list = new ArrayList<>();return list;}

前台代码：

$.ajax({      type: "POST",      url: "${pageContext.request.contextPath}/sys/user?getUser",      success: function(data){        jQuery.each(data, function (i, item) {          alert(item.id);        });      }    });