插入购物车数据

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

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+package com.sky.controller.user;
+
+import com.sky.dto.ShoppingCartDTO;
+import com.sky.result.Result;
+import com.sky.service.ShoppingCartService;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.annotation.Resource;
+
+@RestController
+@RequestMapping("/user/shopping")
+@Slf4j
+@Api(tags = "C端购物车相关接口")
+public class ShoppingCartController {
+    @Resource
+    private ShoppingCartService shoppingCartService;
+
+
+    /**
+     * 添加购物车
+     *
+     * @param shoppingCartDTO ShoppingCartDTO
+     * @return Result
+     */
+    @ApiOperation("添加购物车")
+    @PostMapping("add")
+    public Result<String> add(ShoppingCartDTO shoppingCartDTO) {
+        log.info("添加购物车：{}", shoppingCartDTO);
+        shoppingCartService.addShoppingCart(shoppingCartDTO);
+        return Result.success();
+    }
+}

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

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+package com.sky.mapper;
+
+import com.sky.entity.ShoppingCart;
+import org.apache.ibatis.annotations.Mapper;
+
+import java.util.List;
+
+@Mapper
+public interface ShoppingCartMapper {
+    /**
+     * 添加购物车
+     *
+     * @param shoppingCart ShoppingCart
+     * @return List<ShoppingCart>
+     */
+    List<ShoppingCart> list(ShoppingCart shoppingCart);
+
+    /**
+     * 如果已经存在，只需要将数量+1即可-修改商品数量
+     *
+     * @param shoppingCart ShoppingCart
+     */
+    void updateNumberById(ShoppingCart shoppingCart);
+
+    /**
+     * 插入购物车数据
+     *
+     * @param shoppingCart ShoppingCart
+     */
+    void insert(ShoppingCart shoppingCart);
+}

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

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+package com.sky.service;
+
+import com.sky.dto.ShoppingCartDTO;
+
+public interface ShoppingCartService {
+    /**
+     * 添加购物车
+     *
+     * @param shoppingCartDTO 购物车参数
+     */
+    void addShoppingCart(ShoppingCartDTO shoppingCartDTO);
+}

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

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+package com.sky.service.impl;
+
+import com.sky.context.BaseContext;
+import com.sky.dto.ShoppingCartDTO;
+import com.sky.entity.Dish;
+import com.sky.entity.Setmeal;
+import com.sky.entity.ShoppingCart;
+import com.sky.mapper.DishMapper;
+import com.sky.mapper.SetmealMapper;
+import com.sky.mapper.ShoppingCartMapper;
+import com.sky.service.ShoppingCartService;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.BeanUtils;
+import org.springframework.stereotype.Service;
+
+import javax.annotation.Resource;
+import java.time.LocalDateTime;
+import java.util.List;
+
+@Service
+@Slf4j
+public class ShoppingCartServiceImplImpl implements ShoppingCartService {
+    @Resource
+    private ShoppingCartMapper shoppingCartMapper;
+    @Resource
+    private DishMapper dishMapper;
+    @Resource
+    private SetmealMapper setmealMapper;
+
+    /**
+     * 添加购物车
+     *
+     * @param shoppingCartDTO 购物车参数
+     */
+    @Override
+    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
+        ShoppingCart shoppingCart = new ShoppingCart();
+        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
+        // 获取当前id
+        Long userId = BaseContext.getCurrentId();
+        shoppingCart.setUserId(userId);
+        // 判断当前插入的购物车商品是否存在
+        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
+        // 如果已经存在，只需要将数量+1即可
+        if (list != null && !list.isEmpty()) {
+            ShoppingCart cart = list.get(0);
+            cart.setNumber(cart.getNumber() + 1);
+            shoppingCartMapper.updateNumberById(cart);
+        } else {
+            // 如果不存在。需要新建插入购物车数量
+            Long dishId = shoppingCartDTO.getDishId();
+            // 判断本次添加的是菜品还是套餐
+            if (dishId != null) {
+                // 本次添加的到购物车是菜品
+                Dish dish = dishMapper.getById(dishId);
+                shoppingCart.setName(dish.getName());
+                shoppingCart.setImage(dish.getImage());
+                shoppingCart.setAmount(dish.getPrice());
+            } else {
+                // 本次添加的是套餐
+                Long setmealId = shoppingCartDTO.getSetmealId();
+                Setmeal setmeal = setmealMapper.getById(setmealId);
+                shoppingCart.setName(setmeal.getName());
+                shoppingCart.setImage(setmeal.getImage());
+                shoppingCart.setAmount(setmeal.getPrice());
+            }
+            shoppingCart.setNumber(1);
+            shoppingCart.setCreateTime(LocalDateTime.now());
+            shoppingCartMapper.insert(shoppingCart);
+        }
+    }
+}

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

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+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
+<mapper namespace="com.sky.mapper.ShoppingCartMapper">
+    <!-- 插入购物车数据 -->
+    <insert id="insert">
+        insert into shopping_cart (name, image, user_id, dish_id, setmeal_id, dish_flavor, number, amount,
+                                   create_time)
+        values (#{name}, #{image}, #{userId}, #{dishId}, #{setmealId}, #{dishFlavor}, #{number}, #{amount},
+                #{createTime});
+    </insert>
+
+    <!-- 如果已经存在，只需要将数量+1即可-修改商品数量 -->
+    <update id="updateNumberById">
+        update shopping_cart
+        set number = #{number}
+        where id = #{id};
+    </update>
+
+    <!-- 添加购物车 -->
+    <select id="list" resultType="com.sky.entity.ShoppingCart">
+        select *
+        from shopping_cart
+        <where>
+            <if test="userId != null">
+                and userId = #{userId}
+            </if>
+            <if test="setmealId != null">
+                and setmeal_id = #{setmealId}
+            </if>
+            <if test="dishId != null">
+                and dish_id = #{dishId}
+            </if>
+            <if test="dishFlavor != null">
+                and dish_flavor = #{dishFlavor}
+            </if>
+        </where>
+    </select>
+</mapper>