基于SpringBoot+MyBatis-Plus的玛琪外卖网站开发设计源码

package com.itheima.reggie.service.impl; import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper; import com.baomidou.mybatisplus.core.toolkit.IdWorker; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import com.itheima.reggie.common.BaseContext; import com.itheima.reggie.common.CustomException; import com.itheima.reggie.entity.*; import com.itheima.reggie.mapper.OrderMapper; import com.itheima.reggie.service.*; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.BeanUtils; 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<OrderMapper, Orders> implements OrderService { @Autowired private ShoppingCartService shoppingCartService; @Autowired private UserService userService; @Autowired private AddressBookService addressBookService; @Autowired private OrderDetailService orderDetailService; /** * 用户下单 * * @param orders */ @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<ShoppingCart> wrapper = new LambdaQueryWrapper<>(); wrapper.eq(ShoppingCart::getUserId, userId); List<ShoppingCart> 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<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()); 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); } /** * 用户个人中心订单信息查看 * * @param page * @param pageSize * @return */ @Override public Page<OrdersDto> userPage(int page, int pageSize) { //分页构造器对象 Page<Orders> pageInfo = new Page<>(page, pageSize); Page<OrdersDto> dtoPage = new Page<>(); //创建条件查询对象 LambdaQueryWrapper<Orders> queryWrapper = new LambdaQueryWrapper<>(); //添加排序条件，根据更新时间降序排序 queryWrapper.orderByDesc(Orders::getOrderTime); this.page(pageInfo, queryWrapper); //通过OrderId查寻对应的菜品/套餐 LambdaQueryWrapper<OrderDetail> wrapper = new LambdaQueryWrapper<>(); //对OrderDto进行需要的属性赋值 List<Orders> records = pageInfo.getRecords(); List<OrdersDto> list = records.stream().map((item) -> { OrdersDto ordersDto = new OrdersDto(); //为orderDetails属性赋值 //获取订单ID Long orderId = item.getId(); //根据订单ID查询对应的订单明细 wrapper.eq(OrderDetail::getOrderId, orderId); List<OrderDetail> orderDetailList = orderDetailService.list(wrapper); BeanUtils.copyProperties(item, ordersDto); //对ordersDto的OorderDetai属性进行赋值 ordersDto.setOrderDetails(orderDetailList); return ordersDto; }).collect(Collectors.toList()); BeanUtils.copyProperties(pageInfo, dtoPage, "records"); dtoPage.setRecords(list); return dtoPage; } /** * 再来一单 * * @param order */ @Override public void again(Orders order) { //获取订单里订单号 Orders orderId = this.getById(order.getId()); String number = order.getNumber(); //根据条件进行查询 LambdaQueryWrapper<OrderDetail> queryWrapper = new LambdaQueryWrapper<>(); queryWrapper.eq(OrderDetail::getOrderId, number); List<OrderDetail> orderDetailList = orderDetailService.list(queryWrapper); //根据查到的数据再次添加到购物车里 List<ShoppingCart> list = orderDetailList.stream().map((item) -> { //把从order表中和order_details表中获取到的数据赋值给这个购物车对象 ShoppingCart shoppingCart = new ShoppingCart(); shoppingCart.setName(item.getName()); shoppingCart.setImage(item.getImage()); shoppingCart.setUserId(BaseContext.getCurrentId()); shoppingCart.setDishId(item.getDishId()); shoppingCart.setSetmealId(item.getSetmealId()); shoppingCart.setDishFlavor(item.getDishFlavor()); shoppingCart.setNumber(item.getNumber()); shoppingCart.setAmount(item.getAmount()); return shoppingCart; }).collect(Collectors.toList()); shoppingCartService.saveBatch(list); } }