插入购物车数据
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package com.sky.controller.user;
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import com.sky.dto.ShoppingCartDTO;
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import com.sky.result.Result;
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import com.sky.service.ShoppingCartService;
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import io.swagger.annotations.Api;
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import io.swagger.annotations.ApiOperation;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import javax.annotation.Resource;
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@RestController
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@RequestMapping("/user/shopping")
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@Slf4j
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@Api(tags = "C端购物车相关接口")
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public class ShoppingCartController {
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@Resource
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private ShoppingCartService shoppingCartService;
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/**
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* 添加购物车
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*
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* @param shoppingCartDTO ShoppingCartDTO
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* @return Result
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*/
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@ApiOperation("添加购物车")
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@PostMapping("add")
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public Result<String> add(ShoppingCartDTO shoppingCartDTO) {
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log.info("添加购物车：{}", shoppingCartDTO);
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shoppingCartService.addShoppingCart(shoppingCartDTO);
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return Result.success();
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}
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}
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package com.sky.mapper;
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import com.sky.entity.ShoppingCart;
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import org.apache.ibatis.annotations.Mapper;
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import java.util.List;
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@Mapper
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public interface ShoppingCartMapper {
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/**
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* 添加购物车
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*
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* @param shoppingCart ShoppingCart
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* @return List<ShoppingCart>
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*/
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List<ShoppingCart> list(ShoppingCart shoppingCart);
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/**
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* 如果已经存在，只需要将数量+1即可-修改商品数量
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*
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* @param shoppingCart ShoppingCart
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*/
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void updateNumberById(ShoppingCart shoppingCart);
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/**
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* 插入购物车数据
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*
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* @param shoppingCart ShoppingCart
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*/
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void insert(ShoppingCart shoppingCart);
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}
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package com.sky.service;
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import com.sky.dto.ShoppingCartDTO;
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public interface ShoppingCartService {
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/**
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* 添加购物车
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*
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* @param shoppingCartDTO 购物车参数
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*/
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void addShoppingCart(ShoppingCartDTO shoppingCartDTO);
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}
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package com.sky.service.impl;
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import com.sky.context.BaseContext;
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import com.sky.dto.ShoppingCartDTO;
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import com.sky.entity.Dish;
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import com.sky.entity.Setmeal;
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import com.sky.entity.ShoppingCart;
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import com.sky.mapper.DishMapper;
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import com.sky.mapper.SetmealMapper;
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import com.sky.mapper.ShoppingCartMapper;
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import com.sky.service.ShoppingCartService;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.BeanUtils;
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import org.springframework.stereotype.Service;
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import javax.annotation.Resource;
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import java.time.LocalDateTime;
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import java.util.List;
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@Service
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@Slf4j
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public class ShoppingCartServiceImplImpl implements ShoppingCartService {
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@Resource
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private ShoppingCartMapper shoppingCartMapper;
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@Resource
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private DishMapper dishMapper;
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@Resource
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private SetmealMapper setmealMapper;
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/**
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* 添加购物车
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*
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* @param shoppingCartDTO 购物车参数
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*/
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@Override
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public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
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ShoppingCart shoppingCart = new ShoppingCart();
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BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
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// 获取当前id
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Long userId = BaseContext.getCurrentId();
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shoppingCart.setUserId(userId);
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// 判断当前插入的购物车商品是否存在
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List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
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// 如果已经存在，只需要将数量+1即可
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if (list != null && !list.isEmpty()) {
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ShoppingCart cart = list.get(0);
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cart.setNumber(cart.getNumber() + 1);
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shoppingCartMapper.updateNumberById(cart);
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} else {
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// 如果不存在。需要新建插入购物车数量
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Long dishId = shoppingCartDTO.getDishId();
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// 判断本次添加的是菜品还是套餐
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if (dishId != null) {
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// 本次添加的到购物车是菜品
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Dish dish = dishMapper.getById(dishId);
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shoppingCart.setName(dish.getName());
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shoppingCart.setImage(dish.getImage());
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shoppingCart.setAmount(dish.getPrice());
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} else {
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// 本次添加的是套餐
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Long setmealId = shoppingCartDTO.getSetmealId();
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Setmeal setmeal = setmealMapper.getById(setmealId);
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shoppingCart.setName(setmeal.getName());
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shoppingCart.setImage(setmeal.getImage());
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shoppingCart.setAmount(setmeal.getPrice());
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}
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shoppingCart.setNumber(1);
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shoppingCart.setCreateTime(LocalDateTime.now());
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shoppingCartMapper.insert(shoppingCart);
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}
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}
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}
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<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
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<mapper namespace="com.sky.mapper.ShoppingCartMapper">
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<!-- 插入购物车数据 -->
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<insert id="insert">
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insert into shopping_cart (name, image, user_id, dish_id, setmeal_id, dish_flavor, number, amount,
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create_time)
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values (#{name}, #{image}, #{userId}, #{dishId}, #{setmealId}, #{dishFlavor}, #{number}, #{amount},
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#{createTime});
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</insert>
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<!-- 如果已经存在，只需要将数量+1即可-修改商品数量 -->
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<update id="updateNumberById">
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update shopping_cart
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set number = #{number}
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where id = #{id};
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</update>
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<!-- 添加购物车 -->
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<select id="list" resultType="com.sky.entity.ShoppingCart">
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select *
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from shopping_cart
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<where>
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<if test="userId != null">
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and userId = #{userId}
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</if>
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<if test="setmealId != null">
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and setmeal_id = #{setmealId}
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</if>
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<if test="dishId != null">
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and dish_id = #{dishId}
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</if>
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<if test="dishFlavor != null">
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and dish_flavor = #{dishFlavor}
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</if>
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</where>
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</select>
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</mapper>
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