public int introducirEnBD() {
    int rowsAffected = 0;
    JDBC dbConnection = new JDBC();

    String sql =
        "INSERT INTO placa (FechaCompra, TipoPlacaID)"
            + "VALUES ('"
            + fechaCompra
            + "', '"
            + tipoPlacaID
            + "');";

    System.out.println(sql);

    rowsAffected = dbConnection.ejecutarUpdate(sql);
    System.out.println("FilasAfectadas: " + rowsAffected);

    return rowsAffected;
  }
  public int introducirEnBD() {
    int rowsAffected = 0;
    JDBC dbConnection = new JDBC();

    String sql =
        "INSERT INTO comedero (ComederoID, Descripcion, ModeloID, EstacionID) "
            + "VALUES ('"
            + comederoID
            + "','"
            + descripcion
            + "','"
            + modeloID
            + "','"
            + estacionID
            + "');";

    System.out.println(sql);
    rowsAffected = dbConnection.ejecutarUpdate(sql);
    System.out.println("FilasAfectadas: " + rowsAffected);

    return rowsAffected;
  }