瑞吉外卖-移动端用户下单

用户下单

需求分析

代码的交互过程

准备工作

去支付

发送的请求：

流程：

• 获取当前用户ID
• 查询当前用户的购物车数据
• 像订单插入数据，一条数据
• 像订单明细表插入数据，多条数据（订单里面可能有多条商品）
• 清空购物车数据
• 因为要操作两个表，因此要加入事务注解

OrderServiceImpl.java的代码为：

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private OrderService orderService;

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private UserService userService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Transactional
    public void submit(Orders orders){
        //获取用户ID
        Long userId = BaseContext.getId();


        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(lambdaQueryWrapper);
        //判断购物车是否为空
        if (shoppingCarts==null){
            throw new CustomException("购物车为空，不能下单");
        }

        //查询地址信息
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook==null){
            throw new CustomException("地址信息为空，不能下单");
        }

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

        //通过IdWork生成订单号

        long orderId = IdWorker.getId();

        //计算总金额
        AtomicInteger amount = new AtomicInteger();//具有原子性

        //通过获取购物车中商品的信息来保存订单明细
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);//设置订单编号
            orderDetail.setNumber(item.getNumber());//设置数量
            orderDetail.setImage(item.getImage());
            orderDetail.setName(item.getName());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());//数量*金额
            return orderDetail;
        }).collect(Collectors.toList());

        //保存订单信息
        orders.setNumber(String.valueOf(orderId));
        orders.setStatus(2);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setAmount(new BigDecimal(amount.get()));
        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()));


        //插入订单数据，一条数据
        orderService.save(orders);

        //插入订单明细数据，多条数据
        orderDetailService.saveBatch(orderDetails);

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

OrderController.java代码为：

@RestController
@Slf4j
@RequestMapping("/order")
public class OrderController {

    @Autowired
    private OrderService orderService;

    @RequestMapping("/submit")
    public R<String> submit(@RequestBody Orders orders){
        orderService.submit(orders);
        return R.success("支付成功");
    }
}

查看订单

发送的请求

代码实现

OrderController.java:

@RequestMapping("/userPage")
    public R<Page> page(int page,int pageSize){
        //构造分页构造器
        Page pageInfo = new Page(page,pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Orders> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.orderByDesc(Orders::getOrderTime);
        orderService.page(pageInfo,lambdaQueryWrapper);

        return R.success(pageInfo);
    }

用户退出登录

发送的请求

代码实现

UserController.java

@RequestMapping("/loginout")
    public R<String> loginout(HttpServletRequest request){
        request.getSession().removeAttribute("user");
        return R.success("退出成功");
    }

当订单完成时，再来一单

发送的请求

代码实现

/**
     * 再来一单
     */
    @RequestMapping("/again")
    public R<String> again(@RequestBody Orders orders){
        //获取该订单
        Long id = orders.getId();
        Orders orderNew = orderService.getById(id);
        //设置订单号
        long id1 = IdWorker.getId();
        orderNew.setNumber(String.valueOf(id1));
        orderNew.setId(IdWorker.getId());
        orderNew.setStatus(2);;
        orderNew.setOrderTime(LocalDateTime.now());
        orderNew.setCheckoutTime(LocalDateTime.now());
        orderService.save(orderNew);
        //修改订单明细表
        LambdaQueryWrapper<OrderDetail> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(OrderDetail::getOrderId,id);
        List<OrderDetail> list = orderDetailService.list(lambdaQueryWrapper);
        list.stream().map((item)->{
            long id2 = IdWorker.getId();
            item.setOrderId(id1);
            item.setImage(String.valueOf(id2));
            return item;
        }).collect(Collectors.toList());
        orderDetailService.saveBatch(list);
        return R.success("再来一单");
    }