修改cgy留言板数据时间修改接口

src/main/java/club/joylink/rtss/services/LearnService.java

@@ -412,9 +412,11 @@ public class LearnService implements ILearnService {
                 .values().stream().sorted(Comparator.comparingLong(LearnMessage::getId)).collect(Collectors.toList());
         HashSet<LearnMessage> distinctSet = new HashSet<>(list);
         List<Long> deleteIds = allMessage.stream().filter(message -> !distinctSet.contains(message)).map(LearnMessage::getId).collect(Collectors.toList());
+        if (!CollectionUtils.isEmpty(deleteIds)) {
             example.clear();
             example.createCriteria().andIdIn(deleteIds);
             learnMessageDAO.deleteByExample(example);
+        }
         //修改时间
         int day = 365 * 4;
         Random random = new Random();