Concat Or Join Or Add Two Or More Pdf File To One Pdf FIle Using Java & Lowagie

package com.pkm.concat.two.pdf;

import java.io.*;
import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;

/**
 * Created by pritom on 17/05/2015.
 */
public class ConcatTwoPdfBytes {
    public static void main(String[] args) throws Exception {
        File file = new File("from-1.pdf");
        FileInputStream fileInputStream = new FileInputStream(file);
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

        Document document = new Document();
        Rectangle rectangle = PageSize.A4;
        document.setPageSize(rectangle);
        PdfWriter pdfWriter = PdfWriter.getInstance(document, byteArrayOutputStream);
        document.open();
        PdfContentByte cb = pdfWriter.getDirectContent();

        PdfReader pdfReader = new PdfReader(fileInputStream);
        for (int i = 1; i <= pdfReader.getNumberOfPages(); i++) {
            document.newPage();
            PdfImportedPage page = pdfWriter.getImportedPage(pdfReader, i);
            cb.addTemplate(page, 0, 0);
        }

        File file2 = new File("from-2.pdf");
        fileInputStream = new FileInputStream(file2);
        pdfReader = new PdfReader(fileInputStream);
        for (int i = 1; i <= pdfReader.getNumberOfPages(); i++) {
            document.newPage();
            PdfImportedPage page = pdfWriter.getImportedPage(pdfReader, i);
            cb.addTemplate(page, 0, 0);
        }
        document.close();

        byte[] bytesRead = byteArrayOutputStream.toByteArray();
        File outputFile = new File(file.getName() + " And  " + file2.getName());
        FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
        fileOutputStream.write(bytesRead);
        fileOutputStream.flush();
        fileOutputStream.close();
    }
}

from-1.pdf

from-2.pdf

from-1.pdf And from-2.pdf

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