connections.java

是一个javabean,里面封装了对象。然后调用这个类里面的属性

package com.wj.DBconnection;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;

public class Connections {
	Connection con=null;
	public Connection getCon() throws IOException
	{
		Properties ties=new Properties();
		InputStream is=getClass().getResourceAsStream("/db.properties");
		ties.load(is);
		String driver=ties.getProperty("driver");
		String url=ties.getProperty("url");
		String user=ties.getProperty("user");
		String password=ties.getProperty("password");
		System.out.println(driver);
		System.out.println(url);
		try {
            Class.forName(driver);	
 			con=DriverManager.getConnection(url,user,password);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return con;
	}
}