src/org/wdl/hotelSysTest/sys/service/OrderDetailServiceImpl.java

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package org.wdl.hotelSysTest.sys.service;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import org.wdl.hotelSysTest.sys.dao.OrderDao;
import org.wdl.hotelSysTest.sys.dao.OrderDaoImpl;
import org.wdl.hotelSysTest.sys.dao.OrderDetailDao;
import org.wdl.hotelSysTest.sys.dao.OrderDetailDaoImpl;
import org.wdl.hotelTest.bean.Order;
import org.wdl.hotelTest.bean.OrderDetail;
import org.wdl.hotelTest.util.ConnectionFactory;

public class OrderDetailServiceImpl implements OrderDetailService {
    OrderDetailDao orderDetailDao = new OrderDetailDaoImpl();
    OrderDao orderDao = new OrderDaoImpl();

    @Override
    public OrderDetail findById(int id) {
        return orderDetailDao.findById(id);
    }

    @Override
    public void update(OrderDetail orderDetail, Integer flag) {
        Connection connection = ConnectionFactory.getConnection();
        try {
            connection.setAutoCommit(false);
            orderDetailDao.update(orderDetail, connection);

            Order order = orderDao.findById(orderDetail.getOrderId());
            if (flag == 1) {
                //删除
                order.setTotalPrice(order.getTotalPrice() - orderDetail.getFood().getPrice() * orderDetail.getFood().getDiscount() * orderDetail.getBuyNum());
            } else if (flag == 2) {
                //修改数量
                List<OrderDetail> details = orderDao.findByOrderId(order.getId());
                System.out.println("details:" + details);

                Double totalPrice = orderDetail.getFood().getPrice() * orderDetail.getFood().getDiscount() * orderDetail.getBuyNum();
                for (OrderDetail orderDetail2 : details) {
                    if ((orderDetail2.getId() != orderDetail.getId()) && (orderDetail2.getDisabled() != 1)) {
                        totalPrice = totalPrice + orderDetail2.getFood().getPrice() * orderDetail2.getFood().getDiscount() * orderDetail2.getBuyNum();
                    }
                }

                order.setTotalPrice(totalPrice);
            }
            orderDao.update(order);
            connection.commit();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            ConnectionFactory.close(connection, null, null);
        }

    }