黑马瑞吉外卖软件开发整体流程（七）（导入用户地址，菜品展示，购物车）

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文章目录

一需求分析
二菜品展示
- 2.1 需求分析
- 2.2 交互过程，导入cartData.json，暂时修改前端加载购物车数据。
三购物车
- 3.1 添加购物车
- 查看购物车、清空购物车
四用户下单
- 4.1 需求分析
- 4.2 交互过程
- 4.3 代码开发
- 5用户下单 OrderServiceImpl（重点）

一需求分析

package cn.hncj.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import cn.hncj.reggie.common.BaseContext;
import cn.hncj.reggie.common.R;
import cn.hncj.reggie.entity.AddressBook;
import cn.hncj.reggie.service.AddressBookService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.*;

import java.util.List;


@Slf4j
@RestController
@RequestMapping("/addressBook")
public class AddressBookController {

    @Autowired
    private AddressBookService addressBookService;

    
    @PostMapping
    public R save(@RequestBody AddressBook addressBook) {
        addressBook.setUserId(BaseContext.getCurrentId());
        log.info("addressBook:{}", addressBook);
        addressBookService.save(addressBook);
        return R.success(addressBook);
    }

    
    @PutMapping("default")
    public R setDefault(@RequestBody AddressBook addressBook) {
        log.info("addressBook:{}", addressBook);
        LambdaUpdateWrapper wrapper = new LambdaUpdateWrapper<>();
        wrapper.eq(AddressBook::getUserId, BaseContext.getCurrentId());
        wrapper.set(AddressBook::getIsDefault, 0);
        //SQL:update address_book set is_default = 0 where user_id = ?
        addressBookService.update(wrapper);

        addressBook.setIsDefault(1);
        //SQL:update address_book set is_default = 1 where id = ?
        addressBookService.updateById(addressBook);
        return R.success(addressBook);
    }

    
    @GetMapping("/{id}")
    public R get(@PathVariable Long id) {
        AddressBook addressBook = addressBookService.getById(id);
        if (addressBook != null) {
            return R.success(addressBook);
        } else {
            return R.error("没有找到该对象");
        }
    }

    
    @GetMapping("default")
    public R getDefault() {
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(AddressBook::getUserId, BaseContext.getCurrentId());
        queryWrapper.eq(AddressBook::getIsDefault, 1);

        //SQL:select * from address_book where user_id = ? and is_default = 1
        AddressBook addressBook = addressBookService.getOne(queryWrapper);

        if (null == addressBook) {
            return R.error("没有找到该对象");
        } else {
            return R.success(addressBook);
        }
    }

    
    @GetMapping("/list")
    public R> list(AddressBook addressBook) {
        addressBook.setUserId(BaseContext.getCurrentId());
        log.info("addressBook:{}", addressBook);

        //条件构造器
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(null != addressBook.getUserId(), AddressBook::getUserId, addressBook.getUserId());
        queryWrapper.orderByDesc(AddressBook::getUpdateTime);

        //SQL:select * from address_book where user_id = ? order by update_time desc
        return R.success(addressBookService.list(queryWrapper));
    }
}

二菜品展示 2.1 需求分析

2.2 交互过程，导入cartData.json，暂时修改前端加载购物车数据。

DishController添加查询菜品数据方法

@GetMapping("/list")
    public R> list(Dish dish) {
        //构造查询条件
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List list = dishService.list(queryWrapper);

        List dishDtoList=list.stream().map((item)->{
            DishDto dishDto=new DishDto();

            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();//分类ID
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            Long dishId = item.getId();//当前菜品的id
            LambdaQueryWrapper lambdaQueryWrapper=new LambdaQueryWrapper();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            List dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());



        return R.success(dishDtoList);
    }

SetmealController中根据条件查询出套餐数据

    @GetMapping("/list")
    public R> list(Setmeal setmeal) {
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(setmeal.getCategoryId() != null, Setmeal::getCategoryId, setmeal.getCategoryId());
        queryWrapper.eq(setmeal.getStatus() != null, Setmeal::getStatus, setmeal.getStatus());
        queryWrapper.orderByDesc(Setmeal::getUpdateTime);
        List list = setmealService.list(queryWrapper);
        return R.success(list);
    }

三购物车

3.1 添加购物车

ShoppingCartController

package cn.hncj.reggie.controller;

import cn.hncj.reggie.common.BaseContext;
import cn.hncj.reggie.common.R;
import cn.hncj.reggie.entity.ShoppingCart;
import cn.hncj.reggie.service.ShoppingCartService;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;



    
    @PostMapping("/add")
    public R add(@RequestBody ShoppingCart shoppingCart) {
        log.info("购物车数据:{}",shoppingCart);
        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        //查询当前添加的菜品/套餐 有没有在购物车内
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        //添加条件
        queryWrapper.eq(ShoppingCart::getUserId, currentId);
        if (dishId != null) {
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId, dishId);

        }else {
            //添加到购物车的套餐
            queryWrapper.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        }

        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
        if (cartServiceOne != null) {
            //如果已经存在，就在原来数量技术上+1
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //如果不存在，则添加到购物车，数量默认是1
            shoppingCart.setNumber(1);
            shoppingCartService.save(shoppingCart);
            cartServiceOne=shoppingCart;
        }

        return R.success(cartServiceOne);
    }
}

查看购物车、清空购物车

        
    @GetMapping("list")
    public R> list() {
        log.info("查看购物车。。。");
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List list = shoppingCartService.list(queryWrapper);
        return R.success(list);
    }

@DeleteMapping("/clean")
    public R clean() {
        //sql: delete from shopping_cart where user_id=?
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        shoppingCartService.remove(queryWrapper);
        return R.success("情况购物车成功");
    }

四用户下单 4.1 需求分析

4.2 交互过程

4.3 代码开发

OrderController

package cn.hncj.reggie.controller;

import cn.hncj.reggie.common.R;
import cn.hncj.reggie.entity.Orders;
import cn.hncj.reggie.service.OrderService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController
@Slf4j
@RequestMapping("/order")
public class OrderController {
    @Autowired
    private OrderService orderService;


    
    @PostMapping("/submit")
    public R submit(@RequestBody Orders orders) {
        log.info("订单数据：{}",orders);
        orderService.submit(orders);

        return R.success("下单成功");
    }
}

5用户下单 OrderServiceImpl（重点）

package cn.hncj.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import cn.hncj.reggie.common.BaseContext;
import cn.hncj.reggie.common.CustomException;
import cn.hncj.reggie.entity.*;
import cn.hncj.reggie.mapper.OrderMapper;
import cn.hncj.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List shoppingCarts = shoppingCartService.list(wrapper);

        if(shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook == null){
            throw new CustomException("用户地址信息有误，不能下单");
        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);

        List orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }
}

黑马瑞吉外卖软件开发整体流程（七）（导入用户地址，菜品展示，购物车）

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