I want the same, and searched about 6 hours now. I've made a little example
pdf:
pdftk b.pdf attach_files a.txt a.edi output a.pdf
I suppose the result are document level attachments.
I'am working with iText 2.1.7, and tried the following code with
iText-toolbox-2.1.7.jar:
import java.io.IOException;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.toolbox.plugins.ExtractAttachments;
public class ExtractPdf {
public static void main(String[] args) throws IOException{
PdfReader reader = new PdfReader("/tmp/a.pdf");
PdfDictionary root = reader.getCatalog();
PdfDictionary names =
(PdfDictionary)PdfReader.getPdfObject(root.get(PdfName.NAMES));
PdfDictionary files = (PdfDictionary)
PdfReader.getPdfObject(names.get(PdfName.EMBEDDEDFILES));
try
{
ExtractAttachments.unpackFile(reader, files, "/tmp/");
} catch (Exception e) {
e.printStackTrace();
}
}
}
But nothing happens. I expected a.txt and a.edi in /tmp/. I took a look at
the doc
http://www.docjar.com/docs/api/com/lowagie/toolbox/plugins/ExtractAttachments.html#execute
and the source, too, but have no idea.
I've also tried your posted example from iText 5.x
http://itextpdf.com/tutorials.php?branch=tutorials.attachments&node=doclevel
with iText 2.1.7, but Eclipse shows the error "Type mismatch: cannto convert
from element type object to PdfName" for the line:
for (PdfName key : refs.getKeys()) {
I also take a look at all results for the keyword extract
attachment/embedded in this mailinglist. The answer are always the same. Use
the toolbox or look at this example. It's frustrating, that I don't got it.
It's a simple onliner with PdfTk, which uses iText under the hood. So it
should work. But what did I wrong?
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