Class.forName("oracle.jdbc.driver.OracleDriver");//加载驱动

Connection conn = DriverManager.getConnection

("jdbc:oracle:thin:@127.0.0.1:1521:XE", "system", "123456");

System.out.println("conn============>"+conn);

还有2种是什么

Class.forName("oracle.jdbc.driver.OracleDriver");//加载驱动

Connection conn = DriverManager.getConnection

("jdbc:oracle:thin:@127.0.0.1:1521:XE", "system", "123456");

System.out.println("conn============>"+conn);

还有2种是什么