Oracle数据库如何实现连接Java并操作

public class DbConn {  private static String driver = "oracle.jdbc.driver.OracleDriver";  private static String url = "jdbc:oracle:thin:@localhost:1521:orcl";  private static String user = "root";  private static String password = "root";  private static Connection conn = null;  static {    try {      Class.forName(driver);      Log.logD("------加载驱动成功-----");      conn = (Connection) DriverManager.getConnection(url, user, password);      Log.logD("------连接成功-----");    } catch (ClassNotFoundException e) {      Log.logD("------加载驱动失败，驱动类未找到------");      e.printStackTrace();    } catch (SQLException e) {      e.printStackTrace();      Log.logD("------加载驱动失败------");    }  }   public static Connection getConn(){     return conn;   }}