jdbc工具类

package tool;
import java.io.FileReader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;
 * 这是JDBC的工具类
 * 这个类提供了获取数据库连接对象的方法
 * 
 */
public class  {
	private static Connection con;
	private static String url ;
	private static String user;
	private static String password;
	private static String className;
	
	static{
		try{
			readConfig();
			//获取驱动
			Class.forName(className);
			//获取连接
			con = DriverManager.getConnection(url, user, password);
			
		}catch(Exception ex){
			System.out.println(ex +"连接失败");
		}
	}
	public static void readConfig() throws Exception{
		Properties p = new Properties();
		FileReader fr = new FileReader("config.Properties");
		p.load(fr);
		className = p.getProperty("drivername");
		url = p.getProperty("url");
		user = p.getProperty("user");
		password = p.getProperty("password");
		
	}
	
	
	
	public static  Connection  getConnection() {
		return con;
	}
		
	
}