Java - Impresion inmediata de codigo QR

import java.io.FileOutputStream;

import com.itextpdf.text.Document;

import com.itextpdf.text.pdf.PdfWriter;

import com.itextpdf.text.Paragraph;

import com.itextpdf.text.Image;

import com.itextpdf.text.pdf.BarcodeQRCode;

import com.itextpdf.text.Rectangle;

import java.awt.print.PrinterException;

import java.awt.print.PrinterJob;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.PrintStream;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.print.PrintService;

import javax.print.PrintServiceLookup;

import javax.swing.JOptionPane;

import org.apache.pdfbox.pdmodel.PDDocument;

import org.apache.pdfbox.printing.PDFPageable;

/**

 *

 * @author msalazar

 */

public class ImpresionInmediata {

 //private final static Logger LOGGER = Logger.getLogger("proyprqr.ImpresionInmediata");

    static public void main(String[] args) throws Exception {

        ImpresionInmediata printer = new ImpresionInmediata();

        printer.listarImpresoras();

      //  try {

            ByteArrayOutputStream documentoBytes = printer.crearDocumentoiText();

            printer.imprimir(documentoBytes);

      //  } //catch (IOException | PrinterException ex) {

          //  JOptionPane.showMessageDialog(null, "Error de impresion", "Error", JOptionPane.ERROR_MESSAGE);

           // LOGGER.log(Level.SEVERE, null, ex);

      //  }

    }

    /**

     * Envia a imprimir el ByteArrayOutoutStream creado de un documento iText

     *

     * @param documentoBytes

     * @throws IOException

     * @throws PrinterException

     */

    public void imprimir(ByteArrayOutputStream documentoBytes) throws IOException, PrinterException {

        // Aqui convertimos la el arreglo de salida a uno de entrada que podemos

        // mandar a la impresora

        ByteArrayInputStream bais = new ByteArrayInputStream(documentoBytes.toByteArray());

        // Creamos un PDDocument con el arreglo de entrada que creamos

        PDDocument document = PDDocument.load(bais);

        PrintService myPrintService = this.findPrintService("GP-80220(Cut) Series");

        PrinterJob printerJob = PrinterJob.getPrinterJob();

        printerJob.setPageable(new PDFPageable(document));

        printerJob.setPrintService(myPrintService);

        printerJob.print();

    }

    /**

     * Muestra en pantalla la lista de todas las impresoras disponibles en el

     * sistema

     */

    public void listarImpresoras() {

        PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null, null);

        System.out.println("Lista de impresoras disponibles");

        for (PrintService printService : printServices) {

            System.out.println("\t" + printService.getName());

        }

    }

    /**

     * Nos regresa el PrintService que representa la impresora con el nombre que

     * le indiquemos

     * @param printerName nombre de la impresora que deseamos usar

     * @return PrintService que representa la impresora que deseamos usar

     */

    private PrintService findPrintService(String printerName) {

        PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null, null);

        for (PrintService printService : printServices) {

            System.out.println(printService.getName());

            if (printService.getName().trim().equals(printerName)) {

                return printService;

            }

        }

        return null;

    }

    /**

     * Crea un documento via la libreria iText y lo almacena como un

     * ByteArrayOutputStream

     *

     * @return Documento iText en formato ByteArrayOutputStream

     */

    public ByteArrayOutputStream crearDocumentoiText() throws Exception {

        // Es en este ByteArrayOutputStream donde se pone el documento una vez

        // que se llama a documento.close()

        ByteArrayOutputStream documentoBytes = new ByteArrayOutputStream();

        PrintStream ps = new PrintStream(documentoBytes);

        //PdfWriter pdfWriter = new PdfWriter(documentoBytes);

        Document qr_code_Example = new Document(new Rectangle(100, 100));

        // Step-2: Create PdfWriter object for the document

        PdfWriter writer = PdfWriter.getInstance(qr_code_Example, ps);

        // Step -3: Open document for editing

        qr_code_Example.open();

        //Step-4: Create New paragraph for QR Summary

        //qr_code_Example.add(new Paragraph("Wow, we created a QR Code in PDF document using iText Java"));

        //Step-5: Create QR Code by using BarcodeQRCode Class

        BarcodeQRCode my_code = new BarcodeQRCode("Example QR Code Creation in Itext", 1, 1, null);

        //Step-6: Get Image corresponding to the input string

        Image qr_image = my_code.getImage();

        //Step-7: Stamp the QR image into the PDF document

        qr_code_Example.add(qr_image);

        //Step-8: Close the PDF document

        qr_code_Example.close();

        return documentoBytes;

    }

}