删除购物车一个商品

sky-server/src/main/java/com/sky/controller/user/ShoppingCartController.java

@@ -35,6 +35,20 @@ public class ShoppingCartController {
         return Result.success();
     }
 
+    /**
+     * 删除购物车一个商品
+     *
+     * @param shoppingCartDTO ShoppingCartDTO
+     * @return Result<String>
+     */
+    @ApiOperation("删除购物车一个商品")
+    @PostMapping("/sub")
+    public Result<String> sub(@RequestBody ShoppingCartDTO shoppingCartDTO) {
+        log.info("删除购物车一个商品：{}", shoppingCartDTO);
+        shoppingCartService.subShoppingCart(shoppingCartDTO);
+        return Result.success();
+    }
+
     /**
      * 查看购物车
      *
@@ -43,6 +57,7 @@ public class ShoppingCartController {
     @ApiOperation("查看购物车")
     @GetMapping("/list")
     public Result<List<ShoppingCart>> list() {
+        log.info("查看购物车");
         List<ShoppingCart> list = shoppingCartService.showShoppingCart();
         return Result.success(list);
     }
@@ -55,6 +70,7 @@ public class ShoppingCartController {
     @ApiOperation("清空购物车")
     @DeleteMapping("/clean")
     public Result<String> clean() {
+        log.info("清空购物车");
         shoppingCartService.clean();
         return Result.success();
     }

sky-server/src/main/java/com/sky/mapper/ShoppingCartMapper.java

@@ -8,7 +8,7 @@ import java.util.List;
 @Mapper
 public interface ShoppingCartMapper {
     /**
-     * 添加购物车
+     * 查看购物车商品
      *
      * @param shoppingCart ShoppingCart
      * @return List<ShoppingCart>
@@ -35,4 +35,11 @@ public interface ShoppingCartMapper {
      * @param userId 用户id
      */
     void deleteByUserId(Long userId);
+
+    /**
+     * 根据id删除购物车内容
+     *
+     * @param id 购物车中id
+     */
+    void deleteById(Long id);
 }

sky-server/src/main/java/com/sky/service/ShoppingCartService.java

@@ -25,4 +25,11 @@ public interface ShoppingCartService {
      * 清空购物车
      */
     void clean();
+
+    /**
+     * 删除购物车一个商品
+     *
+     * @param shoppingCartDTO 当前购物车信息
+     */
+    void subShoppingCart(ShoppingCartDTO shoppingCartDTO);
 }

sky-server/src/main/java/com/sky/service/impl/ShoppingCartServiceImplImpl.java

@@ -91,4 +91,33 @@ public class ShoppingCartServiceImplImpl implements ShoppingCartService {
         Long currentId = BaseContext.getCurrentId();
         shoppingCartMapper.deleteByUserId(currentId);
     }
+
+    /**
+     * 删除购物车一个商品
+     *
+     * @param shoppingCartDTO 当前购物车信息
+     */
+    @Override
+    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
+        ShoppingCart shoppingCart = new ShoppingCart();
+        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
+        // 设置当前用户id
+        shoppingCart.setUserId(BaseContext.getCurrentId());
+        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
+
+        if (shoppingCartList != null && !shoppingCartList.isEmpty()) {
+            // // 当前购物车
+            shoppingCart = shoppingCartList.get(0);
+            Integer number = shoppingCart.getNumber();
+            Long id = shoppingCart.getId();
+            // 如果当前值为1直接删除
+            if (number == 1) {
+                shoppingCartMapper.deleteById(id);
+            } else {
+                // 如果当前值不为1需要将数量减一
+                shoppingCart.setNumber(shoppingCart.getNumber() - 1);
+                shoppingCartMapper.updateNumberById(shoppingCart);
+            }
+        }
+    }
 }

sky-server/src/main/resources/mapper/ShoppingCart.xml

@@ -23,7 +23,14 @@
         where user_id = #{userId};
     </delete>
 
-    <!-- 添加购物车 -->
+    <!-- 根据id删除购物车内容 -->
+    <delete id="deleteById">
+        delete
+        from shopping_cart
+        where id = #{id};
+    </delete>
+
+    <!-- 查看购物车商品 -->
     <select id="list" resultType="com.sky.entity.ShoppingCart">
         select *
         from shopping_cart