接口-用户下单

public class OrderController {

    @Autowired
    private OrderService orderService;

    @PostMapping("/submit")
    public Result ordersubmit(@RequestBody OrdersSubmitDTO ordersSubmitDTO){
        log.info("提交订单参数:{}",ordersSubmitDTO);
        OrderSubmitVO order = orderService.order(ordersSubmitDTO);
        return Result.success(order);

    }
}

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Transactional
    public OrderSubmitVO order(OrdersSubmitDTO ordersSubmitDTO){
        //根据提交过来的数据判断地址铺是否为空，如果为空，则抛出异常
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //根据提交过来的数据判断当前用户购物车是否为空，如果为空那么抛出异常
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List list = shoppingCartMapper.list(shoppingCart);
        if (list == null && list.size() > 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //向订单表插入一条数据，并返回订单id
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.PAID);
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());

        orderMapper.insert(orders);

        List orderDetailsList = new ArrayList<>();
        //向订单详细表插入n条数据
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());     //设置当前订单明细关联的订单id
            orderDetailsList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailsList);

        //清空当前购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }
}