Generar códigos de barras en Java

package org.example;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.oned.Code128Writer;
import com.google.zxing.oned.EAN8Writer;
import java.nio.file.Paths;

public class Main {
  public static void main(String[] args) {
    try {
      // Content for encode function of code128writer
      String text = "http://www.google.com";

      // Path where we save our barcode
      String path = "E:\\barcode image\\code128barcode.jpg";

      // Barcode code128 writer object
      Code128Writer c128writer = new Code128Writer();

      // Represents a 2D matrix of bits. Create a bar code with a width of 500 and a height of 300
      BitMatrix matrix = c128writer.encode(text, BarcodeFormat.CODE_128, 500, 300);

      MatrixToImageWriter.writeToPath(matrix, "jpg", Paths.get(path));

      System.out.println("Barcode image file is created...");

      // Digits for encode function of EAN_8
      String digits = "12345678";

      // Path where we save our barcode
      path = "E:\\barcode image\\EANbarcode.jpg";

      // Barcode EAN8 writer object
      EAN8Writer EANwriter = new EAN8Writer();

      /*Represents a 2D matrix of bits.
      Create an EAN bar code of width 500 and height 300*/
      matrix = EANwriter.encode(digits, BarcodeFormat.EAN_8, 500, 300);

      MatrixToImageWriter.writeToPath(matrix, "jpg", Paths.get(path));

      System.out.println("Barcode image file is created...");

    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

package org.example;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.Barcode128;
import com.itextpdf.text.pdf.BarcodeEAN;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfWriter;
import java.io.FileOutputStream;

public class Main {
  public static void main(String[] args) {
    Main.barcodePDF("mybarcodepdf.pdf", "Zeshan");
  }
  public static void barcodePDF(String pdfFilename, String myString) {
    // declare object of document class of the itextpdf library
    Document doc = new Document();
    PdfWriter pdfWriter = null;

    try {
      // initialize docWriter object with the path of the pdf file
      // mention the path of your computer
      pdfWriter =
          PdfWriter.getInstance(doc, new FileOutputStream("E:\\my barcode pdf\\" + pdfFilename));

      // set pdf file properties
      doc.addAuthor("zeshan");
      doc.addCreationDate();
      doc.addProducer();
      doc.addCreator("google.com");
      doc.addTitle("java barcode generation");
      doc.setPageSize(PageSize.A4);
      doc.open();

      /*PdfContentByte is an object that contains the user-positioned text and
      graphic contents of a page*/
      PdfContentByte cb = pdfWriter.getDirectContent();

      // type of barcode
      Barcode128 code128 = new Barcode128();

      // remove all leading and trail space and pass to set code
      code128.setCode(myString.trim());
      code128.setCodeType(Barcode128.CODE128);

      /*create the image of the barcode with null bar color and null text color
      set its position and scale percent*/
      Image code128Image = code128.createImageWithBarcode(cb, null, null);
      code128Image.setAbsolutePosition(10, 700);
      code128Image.scalePercent(150);

      // Add image to pdf file
      doc.add(code128Image);

      // Type of barcode
      BarcodeEAN codeEAN = new BarcodeEAN();

      // Remove all leading and trail space and pass to set code
      codeEAN.setCode(myString.trim());

      // Set barcode type
      codeEAN.setCodeType(BarcodeEAN.EAN13);

      /* Create an image of the barcode with a null bar color and
      null text color its position and scale percent */
      Image codeEANImage = code128.createImageWithBarcode(cb, null, null);
      codeEANImage.setAbsolutePosition(10, 600);
      codeEANImage.scalePercent(150);

      // Add image to pdf file
      doc.add(codeEANImage);
      System.out.println("Barcode in PDF file is created...");

    } catch (Exception ex) {
      ex.printStackTrace();
    } finally {
      // close doc and docwriter if they are not null
      if (doc != null) {
        doc.close();
      }
      if (pdfWriter != null) {
        pdfWriter.close();
      }
    }
  }
}