map去重

shopping-cart-application-service/src/main/java/cn/freemud/service/impl/mcoffee/ShoppingCartMCoffeeServiceImpl.java

@@ -345,7 +345,7 @@ public class ShoppingCartMCoffeeServiceImpl {
         if(CollectionUtils.isNotEmpty(couponList)) {
             List<CouponState> couponStates = couponDiscountCalculation.buildAvailableCoupons(cartGoodsList, partnerId, storeId, couponList);
             if(CollectionUtils.isNotEmpty(couponStates)) {
-                Map<String, Integer> couponStateMap = couponStates.stream().collect(Collectors.toMap(CouponState::getCouponCode, CouponState::getState));
+                Map<String, Integer> couponStateMap = couponStates.stream().collect(Collectors.toMap(CouponState::getCouponCode, CouponState::getState, (k1, k2) -> k1));
                 if(null == couponStateMap.get(couponCode) || Objects.equals(couponStateMap.get(couponCode), CouponStateEnum.STATE_1.getCode())) {
                     couponCode = "";
                 }