Procesamiento por lotes [Batch insert]

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
/**
 * @see https://www.jc-mouse.net/
 * @author mouse
 */
public class Main {

    public static void main(String[] args) throws SQLException {
        Connection connection = conectar("jdbc:mariadb://localhost:3306/TutorialJava", "root", "");
        PreparedStatement statement = null;
        final int batchSize = 10;
        int count = 0;//contador de lotes
        int batch = 1;//numero de lotes
        if (connection != null) {
            try {
                connection.setAutoCommit(false);
                // El Prepared Statement para los insert
                statement = connection.prepareStatement("INSERT INTO alumno (nombre,mail) VALUES (?,?)");

                // Se añaden los datos al batch
                for (String[] dato : alumnos()) {
                    statement.setString(1, dato[0]);
                    statement.setString(2, dato[1]);
                    System.out.printf("> Registro ( %s | %s ) agregado al lote #%s\n", dato[0], dato[1], batch);
                    statement.addBatch();

                    //Se van diviendo los lotes segun un limite establecido
                    if (++count % batchSize == 0) {
                        //se ejecuta lote #N
                        statement.executeBatch();
                        System.out.printf("> Ejecutando lote #%s\n", batch);
                        batch++;
                    }
                }
                
                //Se ejecuta el lote restante
                if (alumnos().length % batchSize != 0) {
                    System.out.printf("> Ejecutando lote #%s\n", batch);
                    statement.executeBatch();
                }

                //confirma transacción
                connection.commit();
                System.out.printf("> TOTAL: [ %s ] alumnos registrados\n", alumnos().length);
                System.out.println("> Programa terminado");
            } catch (SQLException ex) {//si se produce algun error
                System.err.println(ex.getMessage());
                try {
                    System.err.println("> Transacción abortada");
                    System.err.println("> Valores restaurados");
                    System.err.println("> Programa terminado");
                    connection.rollback();
                } catch (SQLException ex1) {
                    System.err.println(ex1.getMessage());
                }
            } finally {
                if (statement != null) {
                    statement.close();
                }
            }
        }
    }

    /**
     * Datos de alumnos a registrar
     *
     * @return String
     */
    public static String[][] alumnos() {
        String[][] data = {
            {"Jorge Nitales", "jorge_n@mail.com"},
            {"Elsa Porrico", "elpo@mail.com"},
            {"Zampa Teste", "zzpa@mail.com"},
            {"Rosamel Fierro", "rosfie@mail.com"},
            {"Luz Rojas", "luzro@mail.com"},
            {"Elsa Podiondo", "els_ondo@mail.com"},
            {"Armando Casas", "arm_casas@mail.com"},
            {"Aquiles Baeza ", "aquiza@mail.com"},
            {"Mary Conazo ", "marzo@mail.com"},
            {"Elma Montt", "elmtt_1@mail.com"},
            {"Lucho Pay", "lucy__pay@mail.com"},
            {"Yola Prieto", "yolto@mail.com"},
            {"Lola Mento", "lolme07@mail.com"},
            {"Cindy Nero", "ci_nro23@mail.com"},
            {"Rosa Melpito", "rospito@mail.com"},
            {"Martin Cabezon", "marzonq@mail.com"},
            {"Email Suarez", "emaez@mail.com"},
            {"Aquiles Castro", "aquistro@mail.com"}
        };
        return data;
    }

    public static Connection conectar(String url, String user, String pass) {
        try {
            Connection connection = DriverManager.getConnection(url, user, pass);
            System.out.println("> Conectado a la base de datos");
            return connection;
        } catch (SQLException ex) {
            System.err.println(ex.getMessage());
        }
        return null;
    }
}