连接oracle数据库

我们在后台经常需要连接数据，操作数据库，我这里给出一个实例（其实我也是看别人的博客的，感谢原博主）

package com.Util;import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;public class DbUtil {private Connection con;private String user = "scott";//数据库用户名，private String password = "orcl123";//密码private String className = "oracle.jdbc.driver.OracleDriver";private String url = "jdbc:oracle:thin:@localhost:1521:ORCL";// 我是用本地Tomcat，所以写localhostpublic static void main(String[] args) {//想要测试可以直接执行此代码，// TODO Auto-generated method stubDbUtil c = new DbUtil();//c.ConnectOracle();Connection con2 = c.getCon();c.closed(con2);}public void ConnectOracle() {try {Class.forName(className);System.out.println("加载数据库驱动成功！");} catch (ClassNotFoundException e) {System.out.println("加载数据库驱动失败！");e.printStackTrace();}}/** 创建数据库连接 */public Connection getCon() {try {Class.forName(className);//System.out.println("加载数据库驱动成功！");} catch (ClassNotFoundException e) {System.out.println("加载数据库驱动失败！");e.printStackTrace();}try {con =  DriverManager.getConnection(url, user, password);//System.out.println("创建数据库连接成功！");} catch (SQLException e) {System.out.print(con);System.out.println("创建数据库连接失败！");con = null;e.printStackTrace();}return con;}public void closed(Connection con)  {if (con != null) {try {con.close();} catch (SQLException e) {// TODO Auto-generated catch blockSystem.out.println("数据库关闭失败");e.printStackTrace();}finally{//System.out.println("数据库关闭成功");}}}}