..

src/main/java/io/renren/modules/admin/controller/AttendersController.java

        if (!params.containsKey("meetingId")) {
            return R.error("会议id不可为空");
        }
        Long meetingId = Long.valueOf(params.get("meetingId").toString());
        if (!meetingService.meetingExist(meetingId)) {
            return R.error("此会议不存在");
        }
        PageUtils page = attendersviewService.queryPage(params);