public DialogoInserccion(String[] columnas, Object[] filas, String tabla, String BD){
    super((JFrame) null, true);
    this.filas = filas;
    this.columnas = columnas;
    this.tabla = tabla;
    this.BD = BD;

    this.conexion = conexion;

    etiquetas = new JLabel[columnas.length];
    campos = new JTextField[columnas.length];

    for(int i=0; i<columnas.length;i++){
        JLabel etiqueta = new JLabel(columnas[i]);
        JTextField campo = new JTextField();
        etiquetas[i] = etiqueta;
        campos[i] = campo;
        this.add(etiqueta);
        this.add(campo);
    }

    btInsertar = new JButton("Insertar");

    this.add(btInsertar);

    btInsertar.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            try {
                MySQL.conecta("jdbc:mysql://localhost:3306/" + BD, "pepe", "pepa");
                PreparedStatement prst = null;

                for(int i=0; i<etiquetas.length;i++){
                   // System.out.println(etiquetas[i].getText());

                }
                MySQL.ejecutaConsulta("SELECT * FROM " + tabla);
                ResultSet rs = MySQL.getRs();
                String[] columnas = new String[rs.getMetaData().getColumnCount()];


                for(int i=0; i<columnas.length;i++){
                    columnas[i] = rs.getMetaData().getColumnName(i);
                    System.out.println("columnas: " + columnas[i]);
                }


                for(int i=0; i<columnas.length;i++){
                    MySQL.ejecutaConsultaAccion("INSERT INTO " +tabla+"("+columnas[i]+")" +
                            " VALUES("+campos[i].getText()+")");
                    System.out.println("Tabla: " + columnas[i]);
                }


            } catch (ClassNotFoundException ex) {
                JOptionPane.showMessageDialog(null, "Clase no encontrada");
            } catch (SQLException ex) {
                JOptionPane.showMessageDialog(null, "Problema al ejecutar la consulta en diálogo " + ex.getMessage());
            }
        }
    });

    this.setLayout(new GridLayout(0, 2, 0, 10));
    pack();
    this.setVisible(true);
}

btInsertar.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            try {
                MySQL.conecta("jdbc:mysql://localhost:3306/" + BD, "pepe", "pepa");
                MySQL.ejecutaConsulta("SELECT * FROM " + tabla);

                for(int i=0; i<campos.length; i++){
                    MySQL.ejecutaConsultaAccion("INSERT INTO "+ tabla +"("+etiquetas[i].getText()+")" +
                            " values("+campos[i].getText()+")");
                }

            } catch (ClassNotFoundException ex) {
                JOptionPane.showMessageDialog(null, "Clase no encontrada");
            } catch (SQLException ex) {
                System.out.println(ex.getMessage() + "n");
            }
        }
    });