Hotel_service_system/OrderDaolmp.java

package jpestore.dao.mysql;

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

import jpestore.dao.OrderDao;
import jpestore.domain.Order;
import jpestore.domain.Product;

public class OrderDaolmp implements OrderDao {

	@Override
	public List<Order> findAll() {
		String sql = "select orderid,userid,orderdate, from orders";
		List<Order>list = new ArrayList<Order>();
		try(
			Connection conn = null;
			PreparedStatement pstmt = conn.prepareStatement(sql);
			ResultSet rs = pstmt.executeQuery()){
				{
			while(rs.next()) {
				Order order = new Order();
			order.setOrderid(rs.getLong("orderid"));
			order.setOrderdate(rs.getDate("orderdate"));
			order.setUserid(rs.getString("userid"));
		
			list.add(order);
			}
		} }catch (SQLException e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
		return list ;
	}

	@Override
	public Order findBYID(String id) {
		// TODO Auto-generated method stub
				Connection conn = null;
				PreparedStatement pstmt = null;
				ResultSet rs = null;
				
				try {
					// 2.创建数据库连接
					conn = DBHelper.getConnection(); //1.加载驱动程序
					String sql = "select orderid,userid,orderdate,status,amount from account where orderid = ?";
					// 3.创建语句对象
					pstmt = conn.prepareStatement(sql);
					// 4.绑定参数
					pstmt.setString(1, id);
					// 5.执行查询
					rs = pstmt.executeQuery();
					// 6.遍历结果集
					if (rs.next()) {

						Order order = new Order();
						
						order.setOrderid(rs.getLong("orderid"));
						order.setUserid(rs.getString("userid"));
						order.setOrderdate(rs.getDate("orderdate"));
						
						return order;

					}
					
				} catch (SQLException e) {
					e.printStackTrace();
				} finally {
					try {
						DBHelper.close(rs, pstmt, conn);
					} catch (SQLException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
				return null;
			}

	@Override
	public int create(Order order) {
		String sql = "insert into orders (orderid,userid,orderdate,status,amount)values (?,?,?,?,?)";
		List<Product>list = new ArrayList<Product>();
		try(
			Connection conn = DBHelper.getConnection();
			PreparedStatement pstmt = conn.prepareStatement(sql);
){pstmt.setLong(1, order.getOrderid());
  pstmt.setString(2, order.getUserid());
  java.util.Date now = new java.util.Date();
  java.sql.Date date = new java.sql.Date(now.getTime());
  java.sql.Timestamp date1 = new java.sql.Timestamp(now.getTime());
  pstmt.setTimestamp(3,date1);
  pstmt.setInt(4, order.getStatus());
  pstmt.setDouble(4, order.getStatus());
  pstmt.setDouble(5, order.getAmout());
  int a = pstmt.executeUpdate();
  System.out.printf("成功输入%d数据.\n",a);
 }catch (SQLException e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
		return 0;
	}

	@Override
	public int modify(Order order) {
		// TODO Auto-generated method stub
		
				String sql = "update orders set amount = ? where orderid = ?";
				
				try ( // 2.创建数据库连接
						Connection conn = DBHelper.getConnection();
						// 3. 创建语句对象
						PreparedStatement pstmt= conn.prepareStatement(sql)
						) {
						// 4. 绑定参数
					
						pstmt.setDouble(1, order.getAmout());
						pstmt.setLong(2, order.getOrderid());

						// 5. 执行修改（C、U、D）
						int affectedRows = pstmt.executeUpdate();
						System.out.printf("成功更新%d条数据。\n", affectedRows);
					} catch (SQLException e) {
						e.printStackTrace();
					}

				return 0;
	}

	@Override
	public int remove(Order order) {
		
		String sql = "delete from orders where orderid = ?";
		
		try ( // 2.创建数据库连接
				Connection conn = DBHelper.getConnection();
				// 3. 创建语句对象
				PreparedStatement pstmt = conn.prepareStatement(sql)) {

				// 4. 绑定参
				pstmt.setLong(1, order.getOrderid());
				
				// 5. 执行修改（C、U、D）
				int affectedRows = pstmt.executeUpdate();
				System.out.printf("成功删除%d条数据。\n", affectedRows);
			} catch (SQLException e) {
				e.printStackTrace();
			}
		return 0;
	}
	}