导入用户地址簿相关功能代码

 

 

菜品展示

 

 购物车模块

 加入购物车：

@PostMapping("/add")
public R add(@RequestBody ShoppingCart shoppingCart){
    //获取当前线程用户的id并设置到shoppingCart中
    Long currentId = BaseContext.getCurrentId();

    shoppingCart.setUserId(currentId);
    //首先我们要判断当前购物车是否已经有同样的dish或者setmeal
    LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper=new LambdaQueryWrapper<>();
    //先判断
    lambdaQueryWrapper.eq(ShoppingCart::getUserId,shoppingCart.getUserId());
    //如果有dishID说明是添加的是菜品，没有则表示是套餐
    if (shoppingCart.getDishId()!=null){
        lambdaQueryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());
    }else {
        lambdaQueryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
    }

    ShoppingCart shoppingCart1 = shoppingCartService.getOne(lambdaQueryWrapper);
    //如果查出来了说明当前已经有了，我们把number+1
    if (shoppingCart1!=null){
        shoppingCart1.setNumber(shoppingCart1.getNumber()+1);
        shoppingCartService.updateById(shoppingCart1);
    }else {
        //如果没查出来说明没有，我们存储数据 初始化number为1
        shoppingCart.setNumber(1);

        //给控的shoppingCart1赋值，保持两种情况返回的都是shoppingCart1
        shoppingCart1=shoppingCart;
        shoppingCartService.save(shoppingCart1);
    }


    return new R(1,"添加菜品或套餐成功",shoppingCart1);

数量减少

@PostMapping("/sub")
public R sub(@RequestBody ShoppingCart shoppingCart){
    //首先获取当前用户id
    Long currentId = BaseContext.getCurrentId();
    LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
    queryWrapper.eq(ShoppingCart::getUserId,currentId);
    //判断是dish还是setmeal
    if (shoppingCart.getDishId()!=null){
        queryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());
    }else {
        queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
    }
    ShoppingCart one = shoppingCartService.getOne(queryWrapper);
    int number=one.getNumber();
    //如果number>1就减，如果是1就删除数据
    if (number>1){
        one.setNumber(number-1);
        shoppingCartService.updateById(one);
    }else if(number==1){
        one.setNumber(0);
        shoppingCartService.removeById(one);
    }
    return new R(1,"减少成功",one);

}

清空购物车

@DeleteMapping("clean")
public R clean(){
    LambdaQueryWrapper<ShoppingCart> queryWrapper =new LambdaQueryWrapper<>();
    queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
    shoppingCartService.remove(queryWrapper);

    return new R(1,"清空购物车成功");
}

用户下单

 

 

 

 前面三个我们之前都已经完成了，只需要完成第四个内容

 

 

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {


    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Override
    public void submit(Orders orders) {
        //1.查询当前用户id
        Long currentId = BaseContext.getCurrentId();

        //2.查询当前用户购物车信息
        LambdaQueryWrapper<ShoppingCart> queryWrapper =new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);

        if (shoppingCarts==null||shoppingCarts.size()==0){
            throw new CustomException("购物车信息为0");
        }

        //查询用户信息
        User user = userService.getById(currentId);

        //查询地址信息
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook==null){
            throw new CustomException("地址信息有误，不能下单");
        }
        //用baomidou生成一个订单id
        long orderId = IdWorker.getId();
        //定义初始为0的总额，原子操作保证线程安全
        AtomicInteger amount =new AtomicInteger(0);

        List<OrderDetail> 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());
            //累加每一个种类的金额
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).toList();

        //3.向订单表插一条数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);//2代表待发货
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(currentId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());//收货人
        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()));
        this.save(orders);

        //4.向订单明细表插入多条数据
        orderDetailService.saveBatch(orderDetails);

        //5.清空购物车
        shoppingCartService.remove(queryWrapper);
    }