防止促销有问题导致购物车跟着npe

shopping-cart-application-service/src/main/java/cn/freemud/service/impl/calculate/CalculationSharingEquallyService.java

@@ -223,6 +223,8 @@ public class CalculationSharingEquallyService {
                 activityDiscountsDtos.add(activityDiscountsDto);
             }
         }
+        //鬼知道促销会有什么问题，反正qa已经出现促销某种情况下没有返回priority字段了，这里为空置位0，防止排序npe影响购物车
+        activityDiscountsDtos.stream().forEach(a -> { if (null==a.getPriority()) a.setPriority(0); });
         //美团POS需求，将优惠信息按照优惠优先级排序
         activityDiscountsDtos.sort((a1, a2) -> a2.getPriority() - a1.getPriority());
         shoppingCartGoodsDto.setActivityDiscountsDtos(activityDiscountsDtos);