促销金额大于商品金额的极端情况显示问题处理

framework/src/main/java/cn/lili/modules/order/order/entity/dto/PriceDetailDTO.java

@@ -349,14 +349,30 @@ public class PriceDetailDTO implements Serializable {
 
     public void setDiscountPrice(Double discountPrice) {
         this.discountPrice = discountPrice;
+        promotionPriceHandler();
         this.recount();
     }
 
     public void setCouponPrice(Double couponPrice) {
         this.couponPrice = couponPrice;
+        promotionPriceHandler();
         this.recount();
     }
 
+    /**
+     * 如果促销金额+优惠券金额大于商品金额问题处理
+     */
+    private void promotionPriceHandler() {
+        if (couponPrice == null || discountPrice == null) {
+            return;
+        }
+        //如果订单优惠总额>商品金额，则处理一下数据，使得两数相加<=商品金额
+        if (CurrencyUtil.add(couponPrice, discountPrice) > goodsPrice) {
+            couponPrice = CurrencyUtil.sub(goodsPrice, discountPrice);
+            this.setCouponPrice(couponPrice);
+        }
+    }
+
     public void setDistributionCommission(Double distributionCommission) {
         this.distributionCommission = distributionCommission;
         this.recount();