无法通过JDBC将h2o连接到数据库

import java.sql.*;
import java.io.*;

public class DatabaseToCSV {
    public static void main(String[] args) {
        String jdbcUrl = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "username";
        String password = "password";
        String query = "SELECT * FROM mytable";
        String csvFile = "output.csv";

        try (Connection conn = DriverManager.getConnection(jdbcUrl, username, password);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery(query);
             BufferedWriter bw = new BufferedWriter(new FileWriter(csvFile))) {

            ResultSetMetaData rsmd = rs.getMetaData();
            int columnsNumber = rsmd.getColumnCount();

            while (rs.next()) {
                for (int i = 1; i <= columnsNumber; i++) {
                    if (i > 1) bw.write(",");
                    bw.write(rs.getString(i));
                }
                bw.newLine();
            }
        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
    }
}

import water.H2O;
import water.Key;
import water.fvec.Frame;
import water.fvec.Vec;

public class H2OLoader {
    public static void main(String[] args) {
        String csvFile = "output.csv";
        Frame frame = new Frame(Key.make("mydata"), new Vec[] {
            Vec.fromCSVFile(csvFile, 0, true, false)
        });
        H2O.waitForCloudSize(1, 60000);
        System.out.println(frame.toString());
    }
}