public boolean buscarEditorial(String xNombre) {
        boolean b = false;
        Connection miConexion = fachada.GetConnection();
        String sql = "select nombre from editorial where nombre='" + xNombre + "'";
        if (miConexion != null) {
            try {
                Statement instruccion = miConexion.createStatement();
                ResultSet tabla = instruccion.executeQuery(sql);
                while (tabla.next() && !b) {
                    b = true;
                }
            } catch (SQLException ex) {
                Logger.getLogger(EditorialDao.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return b;
    }