!1491 fix(mall): 修复商品SPU库存计算溢出问题

Merge pull request !1491 from Jarrett/master-jdk17

yudao-module-mall/yudao-module-product/src/main/java/cn/iocoder/yudao/module/product/service/spu/ProductSpuServiceImpl.java

@@ -109,7 +109,7 @@ public class ProductSpuServiceImpl implements ProductSpuService {
         // sku 单价最低的商品的成本价格
         spu.setCostPrice(getMinValue(skus, ProductSkuSaveReqVO::getCostPrice));
         // skus 库存总数
-        spu.setStock(getSumValue(skus, ProductSkuSaveReqVO::getStock, Integer::sum));
+        spu.setStock(getSumValue(skus, ProductSkuSaveReqVO::getStock, Math::addExact));
         // 若是 spu 已有状态则不处理
         if (spu.getStatus() == null) {
             spu.setStatus(ProductSpuStatusEnum.ENABLE.getStatus()); // 默认状态为上架