空指针bug修复

src/main/java/com/project/appeal/domain/service/Impl/SearchAppealDomainServiceImpl.java

@@ -109,8 +109,12 @@ public class SearchAppealDomainServiceImpl implements SearchAppealDomainService
                         kpEntity -> kpEntity
                 ));
 
+        if (CollectionUtils.isEmpty(kpIdToEntityMap)) {
+            return appealDTOList;
+        }
+
         appealDTOList.forEach(appealDTO -> {
-            List<Long> kpIdList = appealDTO.getKpIdList();
+            List<Long> kpIdList = Optional.ofNullable(appealDTO.getKpIdList()).orElse(Collections.emptyList());
 
             String kpContentStr = kpIdList.stream()
                     .filter(kpId -> kpIdToEntityMap.containsKey(kpId))