汽车租赁管理系统/反编译出来的文件/carRentalSystem/com/bluedot/common/JdbcUtil.java

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// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   JdbcUtil.java

package com.bluedot.common;

import java.io.*;
import java.sql.*;
import java.util.Properties;

public class JdbcUtil
{

	private static Properties props;

	public JdbcUtil()
	{
	}

	public static Connection getConnection()
	{
		Connection conn = null;
		try
		{
			String drivers = props.getProperty("jdbc.drivers");
			if (drivers != null)
				Class.forName(drivers);
			String url = props.getProperty("jdbc.url");
			String username = props.getProperty("jdbc.username");
			String password = props.getProperty("jdbc.password");
			conn = DriverManager.getConnection(url, username, password);
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
		return conn;
	}

	public static void closeConn(Connection conn)
	{
		try
		{
			conn.close();
		}
		catch (SQLException e)
		{
			e.printStackTrace();
		}
	}

	public static void rollback(Connection conn)
	{
		try
		{
			conn.rollback();
		}
		catch (SQLException e)
		{