JDBC使用密码连接但没有用户名吗？

Question

I am trying to connect to a server (via JDBC) which requires a password, but a blank username. When I try using an empty String ("") it causes an error:

java.sql.SQLException: invalid arguments in call

The code I am using worked to connect to another server (which requires username and password), so it is operable; just not in this specific case (empty string username). I also can access the connection for this specific server which requires no username via SQLDeveloper, so that's not offline or inaccessible. In SQLDeveloper I can enter an empty username field without incident.

From what I've read one can connect with JDBC with username and password, or with neither. But I can't find a solution for a blank username. There must be a hacky way around the problem.

private Connection getConnection() throws SQLException
{
    OracleDataSource ds = new OracleDataSource();
    ds.setURL("jdbc:oracle:thin:@" + serverName + ":" + portNumber + ":" + sid);
    System.out.println("attempting connection");
    connection = ds.getConnection(textFieldUsername.getText(), new String(passwordField.getPassword()));
    System.out.println("connection established");
    return connection;
}

Answer 1

Have you tried to connect through the DriverManager interface?

Connection conn = DriverManager.getConnection(url, props);

Where props doesn't have any entry for the username.