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Merging two pdfs

Palak Agarwal

Joined: Nov 02, 2011
Posts: 21
hi all,

I am trying to merge two pdfs using java code. the following code merges the required pdf but the second pdf gets zoomed.I am using iText java library for this code.
Does anybody have idea, for this behaviour of code.
Kindly help me with this issue.

public static void concatPDFs(List<InputStream> streamOfPDFFiles,

OutputStream outputStream, boolean paginate) {

Document document = new Document(PageSize.A2);

try {
List<InputStream> pdfs = streamOfPDFFiles;
List<PdfReader> readers = new ArrayList<PdfReader>();
int totalPages = 0;
Iterator<InputStream> iteratorPDFs = pdfs.iterator();

// Create Readers for the pdfs.
while (iteratorPDFs.hasNext()) {
InputStream pdf =;
PdfReader pdfReader = new PdfReader(pdf);
totalPages += pdfReader.getNumberOfPages();
// Create a writer for the outputstream
PdfWriter writer = PdfWriter.getInstance(document, outputStream);;
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,
BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
PdfContentByte cb = writer.getDirectContent(); // Holds the PDF
// data

PdfImportedPage page;
int currentPageNumber = 0;
int pageOfCurrentReaderPDF = 0;
Iterator<PdfReader> iteratorPDFReader = readers.iterator();

// Loop through the PDF files and add to the output.
while (iteratorPDFReader.hasNext()) {
PdfReader pdfReader =;

// Create a new page in the target for each source page.
while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
page = writer.getImportedPage(pdfReader,

cb.addTemplate(page, 0, 0);

// Code for pagination.
if (paginate) {
//cb.rectangle (document.left (), document.bottom (), document.right ()-document.left (),
// ()-document.bottom ());
cb.setFontAndSize(bf, 10);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER, ""
+ currentPageNumber + " of " + totalPages, 520,
5, 0);
pageOfCurrentReaderPDF = 0;
} catch (Exception e) {
} finally {
if (document.isOpen())
try {
if (outputStream != null)
} catch (IOException ioe) {

with regards
It is sorta covered in the JavaRanch Style Guide.
subject: Merging two pdfs