Java连接Oracle代码

package Util;
import java.sql.*;

public class DBUtil {
    
    
    public static Connection getConnection() {
    Connection conn = null;
    try {
    Class.forName("oracle.jdbc.driver.OracleDriver"); //加载数据库驱动
    System.out.println("数据库驱动加载成功！");    //输出的信息
    String url = "jdbc:oracle:thin:@localhost:1521:orcl";    //获取连接URL
    String user = "TEACHER"; //连接用户名
    String password = "***"; //连接密码
    Connection con = DriverManager.getConnection(url, user, password); //获取数据库连接
    if (con != null) {
    System.out.println("成功的与Oracle数据库建立连接！！");
    }
    } catch (Exception e) {
    e.printStackTrace();
    } 
    return conn; //返回Connection实例 
    }
    //关闭资源的方法
        public static void close(Connection connection ) {
            try {
                if (connection != null) {
                    connection.close();
                    }
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        public static void close(PreparedStatement preparedStatement ) {
            try {
                if (preparedStatement != null) {
                    preparedStatement.close();
                    }
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        public static void close(ResultSet resultSet ) {
            try {
                if (resultSet != null) {
                    resultSet.close();
                    }
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

}