package util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBHelper {
	public static final String driver="com.mysql.jdbc.Driver";
	public static final String url="jdbc:mysql://localhost:3306/test";
	public static final String username="root";
	public static final String password="123456";
	public static Connection con=null;
	static{
	try {

	Class.forName(driver);//�õ�DriverManager�������潨������ʱʹ��

	} catch (ClassNotFoundException e) {
	e.printStackTrace();
	}
	}
	public static Connection getConnection(){

	if(con==null){

	try {

	con=DriverManager.getConnection(url,username,password);//��������,ʹ�õIJ�����������������������ַ���������

	} catch (SQLException e) {
	e.printStackTrace();

	}
	}
	return con;

	}


}