fix

cooleshow-user/user-biz/src/main/java/com/yonge/cooleshow/biz/dal/service/impl/ActivityRewardServiceImpl.java

@@ -169,8 +169,10 @@ public class ActivityRewardServiceImpl extends ServiceImpl<ActivityRewardDao, Ac
 
         List<ActivityPlanRewardDto> activityPlanRewardDtos = activityPlanRewardService.queryActivityPlanReward(
                 activityId);
-        StringBuilder activityRewardName = new StringBuilder();
 
+        if (CollectionUtils.isEmpty(activityPlanRewardDtos)) {
+            return new ArrayList<>();
+        }
 
         // 级联锁同时处理奖品库存
         List<RLock> lockList = new ArrayList<>();