marko,
Here is a sample of code I have used. You can either return a
ByteArrayOutputStream (os) or you can convert this ByteArrayOutputStream to
ByteArray (os.toByteArray()).
// begin sample code //
public ByteArrayOutputStream concatByteArrays (byte[] doc1, byte[] doc2){
// or public byte[] concatByteArrays (byte[] doc1, byte[] doc2){
/**
* used to return merged doc as ByteArrayOutputStream
*/
java.io.ByteArrayOutputStream os = new java.io.ByteArrayOutputStream();
try{
Document document = null;
byteArrayOutputStream = new ByteArrayOutputStream();
PdfCopy Writer = null;
/**
* create a reader for doc1
*/
PdfReader reader = new PdfReader(doc1);
reader.consolidateNamedDestinations();
/**
* retrieve total number of pages
*/
int n = reader.getNumberOfPages();
/**
* creation of document object
*/
document = new Document(reader.getPageSizeWithRotation(1));
/**
* cr4eate a writer that listens to the document
*/
writer = new PdfCopy(document, os);
writer.setViewerPreferences(PdfWriter.PageModeUseOutlines);
/**
* now open the document
*/
document.open();
/**
* add content
*/
PdfImportedPage page;
for (int i = 0; i < n; ){
++i;
page = writer.getImportedPage(reader, i);
writer.addPage(page);
}// end for loop
writer.freeReader(reader);
/**
* create a reader for doc2
*/
reader = new PdfReader(doc2);
reader.consolidateNamedDestinations();
/**
* retrieve the total number of pages
*/
n = reader.getNumberOfPages();
/**
* add contents of doc2
*/
for (int i = 0; i < n; ){
++i;
page = writer.getImportedPage(reader, i);
writer.addPage(page);
}// end second for loop
writer.freeReader(reader);
/**
* now close the document
*/
document.close();
}// end try
catch (Exception e) { e.printStackTrace(); }// end catch
retrun os; // or return os.toByteArray();
}// end concatByteArrays
// end sample code //
Hope this helps.
Ed
marko[FIN] wrote:
>
> Ho do i merge two pdfs from byte arrays with different page sizes? I have
> wrote the followin code, it merges them but the page sizes are the same.
>
> public static byte[] mergePdfs(byte[] firstPdf, byte[] lastPdf)
>
> ByteArrayOutputStream byteArrayOutputStream = null;
> byte[] mergedPdf = null;
> try{
> Document document = new Document();
> byteArrayOutputStream = new ByteArrayOutputStream();
> PdfWriter pdfWriter = PdfWriter.getInstance(document,
> byteArrayOutputStream);
>
> document.open();
> PdfContentByte pdfContentByte = pdfWriter.getDirectContent();
> PdfImportedPage pdfImportedPage = null;
>
> PdfReader pdfReader = new PdfReader(firstPdf);
>
> for (int i = 0; i < pdfReader.getNumberOfPages(); i++) {
> document.newPage();
> pdfImportedPage = pdfWriter.getImportedPage(pdfReader, i + 1);
> float width = pdfImportedPage.getWidth();
> float height = pdfImportedPage.getHeight();
> document.setPageSize(new Rectangle(width, height)); // doesent
> work
> pdfContentByte.addTemplate(pdfImportedPage, 0, 0);
> } // for
>
> pdfReader = new PdfReader(lastPdf);
> for (int i = 0; i < pdfReader.getNumberOfPages(); i++) {
> document.newPage();
> pdfImportedPage = pdfWriter.getImportedPage(pdfReader, i + 1);
> float width = pdfImportedPage.getWidth();
> float height = pdfImportedPage.getHeight();
> document.setPageSize(new Rectangle(width, height)); // doesent
> work
> pdfContentByte.addTemplate(pdfImportedPage, 0, 0);
> } // for
>
> document.close();
> mergedPdf = byteArrayOutputStream.toByteArray();
> } // try
>
--
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