修复查询黑名单bug

src/main/java/cn/quantgroup/qgblservice/service/impl/BlackListQueryManagerServiceImpl.java

@@ -22,6 +22,7 @@ import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
@@ -100,11 +101,11 @@ public class BlackListQueryManagerServiceImpl implements IBlackListQueryManagerS
 
                     if (CollectionUtils.isNotEmpty(totalOverdueDaysList)) {
                         Object totalOverdueDays = totalOverdueDaysList.get(0).get(Constant.PARAM.TOTAL_OVERDUE_DAYS);
-                        blackListQueryTidbVo0.setTotalOverdueDays(totalOverdueDays.toString());
+                        blackListQueryTidbVo0.setTotalOverdueDays(Objects.nonNull(totalOverdueDays) ? totalOverdueDays.toString() : null);
                     }
                     if (CollectionUtils.isNotEmpty(maxOverdueDaysList)) {
                         Object maxOverdueDays = maxOverdueDaysList.get(0).get(Constant.PARAM.MAX_OVERDUE_DAYS);
-                        blackListQueryTidbVo0.setMaxOverdueDays(maxOverdueDays.toString());
+                        blackListQueryTidbVo0.setMaxOverdueDays(Objects.nonNull(maxOverdueDays) ? maxOverdueDays.toString() : null);
                     }
 
                     blackListQueryTidbVo0s.add(blackListQueryTidbVo0);