List<Map<String, Object>> dataList = Lists.newArrayList();
Searchable searchable = Searchable.newSearchable();
searchable.addSearchFilter("userId", SearchOperator.eq, userId);
// searchable.addSearchFilter("read", SearchOperator.eq, Boolean.FALSE);
searchable.addSort(Sort.Direction.DESC, "id");
searchable.setPage(0, 5);
Page<NotificationData> page = notificationDataService.findAll(searchable);
for(NotificationData data : page.getContent()) {