返回的对象是空，是什么原因

生成的controller，返回对象都是空，是什么原因。

{ "STATUS": "1", -"ITEMS": { -"records": [ { }, { }, { }, { }, { }, { }, { }, { }, { }, { } ], "total": 36, "size": 10, "current": 1, "pages": 4 }, "BUSINESSSTATUS": "", "MESSAGE": "查询成功" } 其实service是取到值的

@GetMapping @ApiOperation(value = "获取全部",notes = "返回分页过后的数据",httpMethod = "GET") @ApiImplicitParams({ @ApiImplicitParam(name = "page",value = "查询页码", paramType = "query",dataType = "Integer",defaultValue = "1"), @ApiImplicitParam(name = "pageSize",value = "每页数据量", paramType = "query",dataType = "Integer",defaultValue = "10") }) public Map<CodeMsgEnum, Object> list(@ApiIgnore @RequestParam Map<String, Object> params) { Page coursePage = new Query<>(params); QueryWrapper wrapper = new QueryWrapper<>(); IPage courseIPage = courseMapper.selectPage(coursePage,wrapper); return MessageResultUtils.getResults(courseIPage, CodeMsgEnum.SEARCH_SUCCESS); }