I understand that I need to close the PdfStamper before it would write
anything.
I also know that I should setCloseStream as false if I want to keep on
appending stuffs to the outputStream (I read this from searching in the
mailing list reply).
Here is the additional snippets that I didn't add:
PdfImportedPage page = stamper.getImportedPage(reader, 1);
over = stamper.getOverContent(1);
over.beginText();
over.setFontAndSize(bf, 18);
over.showTextAligned(Element.ALIGN_LEFT,
"DUPLICATE OF AN EXISTING PDF DOCUMENT", 30, 600, 0);
over.endText();
stamper.getWriter().setCloseStream(false);
stamper.close();
However, it still doesn't work.
The only way to make it work is to create a new FileOutputStream and write
it to another file.
I could do that, and then import the temporary file into the main stream,
and then delete the temporary file, but that would be extra un-necessary
processing if I could find a way to output PdfStamper to the same file (via
the main writer, or the same FileOutputStream that creates the main writer).
Meanwhile, I will try to read the documentation again, it seemed that I
don't understand how output stream works.
Paulo Soares-3 wrote:
>
>
>
>> -----Original Message-----
>> From: rorostar [mailto:[email protected]]
>> Sent: Tuesday, February 10, 2009 4:57 PM
>> To: [email protected]
>> Subject: [iText-questions] PdfStamper appending to existing file
>>
>>
>> Hi,
>>
>> I have a question regarding PdfStamper.
>>
>> Here is the code snippets
>>
>>
>> FileOutputStream outputStream = new
>> FileOutputStream("C:\\Java\\HelloWorld.pdf");
>> PdfWriter writer = PdfWriter.getInstance(document, outputStream);
>> document.open();
>> //add stuffs to documents
>>
>> //This is the file to copy
>> PdfReader reader = new PdfReader(new
>> FileInputStream("c:\\java\\original.pdf"));
>>
>> //how do I create a PdfStamper and redirecting the output to
>> the existing
>> writer so it could be appended to the same file?
>> //Most examples force the user to create another PDF file
>> //I tried using outputStream and it didn't work.
>> PdfStamper stamper = new PdfStamper(reader, outputStream);
>>
>> Any suggestion?
>>
>
> Read the documentation and don't invent. That's done by importing pages
> and you'll always need to close the PdfStamper before doing it but it may
> reside in memory.
>
> Paulo
>
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