PreparedStatement pst = cn.prepareStatement(sSQL);

        pst.setString (1, dts.getConsecutivo());
        pst.setInt    (2, dts.getId_proveedor());
        pst.setString (3, dts.getProducto());
        pst.setDouble (4, dts.getCantidad());
        pst.setDouble (5, dts.getFvalor());
        pst.setDate   (6, dts.getFechaini());
        pst.setDate   (7, dts.getFechafin());
        pst.setString (8, dts.getConcepto());


        int n = pst.executeUpdate();
        if (n != 0) {
            return true;
        } else {
            return false;
        }

    } catch (Exception e) {
        JOptionPane.showConfirmDialog(null, e);
    }
    return false;
}