商品销量中增加

frontend/getitem.html

@@ -100,6 +100,7 @@
                 success: function (data) {
                     if (data.status == "success") {
                         alert("下单成功");
+                        window.location.reload();
                     } else {
                         alert("下单失败，原因为" + data.data.errMsg);
                         if (data.data.errCode == "20003") {

src/main/java/com/cxyxiaomo/flashsale/dao/ItemDOMapper.java

@@ -1,6 +1,7 @@
 package com.cxyxiaomo.flashsale.dao;
 
 import com.cxyxiaomo.flashsale.dataobject.ItemDO;
+import org.apache.ibatis.annotations.Param;
 
 import java.util.List;
 
@@ -54,4 +55,6 @@ public interface ItemDOMapper {
      * @mbg.generated Thu Mar 03 13:12:13 CST 2022
      */
     int updateByPrimaryKey(ItemDO record);
+
+    int increaseSales(@Param("id") Integer id, @Param("amount") Integer amount);
 }

src/main/java/com/cxyxiaomo/flashsale/service/ItemService.java

@@ -15,5 +15,9 @@ public interface ItemService {
     // 商品详情浏览
     ItemModel getItemById(Integer id);
 
+    // 库存扣减
     boolean decreaseStock(Integer itemId, Integer amount) throws BusinessException;
+
+    // 商品销量增加
+    void increaseSales(Integer itemId, Integer amount);
 }

src/main/java/com/cxyxiaomo/flashsale/service/impl/ItemServiceImpl.java

@@ -116,6 +116,12 @@ public class ItemServiceImpl implements ItemService {
         }
     }
 
+    @Override
+    @Transactional
+    public void increaseSales(Integer itemId, Integer amount) {
+        itemDOMapper.increaseSales(itemId, amount);
+    }
+
     private ItemModel convertModelFromDataObject(ItemDO itemDO, ItemStockDO itemStockDO) {
         ItemModel itemModel = new ItemModel();
         BeanUtils.copyProperties(itemDO, itemModel);

src/main/java/com/cxyxiaomo/flashsale/service/impl/OrderServiceImpl.java

@@ -70,12 +70,15 @@ public class OrderServiceImpl implements OrderService {
         orderModel.setItemPrice(itemModel.getPrice());
         orderModel.setOrderPrice(itemModel.getPrice().multiply(new BigDecimal(amount)));
 
-        // 生成交易流水号，订单号
+        // 生成交易流水号(订单号)
         orderModel.setId(generateOrderNo());
 
         OrderDO orderDO = convertFromOrderModel(orderModel);
         orderDOMapper.insertSelective(orderDO);
 
+        // 商品销量增加
+        itemService.increaseSales(itemId, amount);
+
         // 4. 返回前端
         return orderModel;
     }

src/main/resources/mapping/ItemDOMapper.xml

@@ -149,4 +149,9 @@
     from item_info
     order by sales DESC
   </select>
+  <update id="increaseSales">
+    update item_info
+    set sales = sales + #{amount}
+    where id = #{id,jdbcType=INTEGER}
+  </update>
 </mapper>