Create pdf and merge with pdfbox

Question

This is what I want to do:

1. Make 2 different pdf files using pdfbox

2. Merge these two files together using pdfmerger

I know how

Answer 1

You just need to use the PdfMergeUtility.addSource(InputStream) method to add source from an inputstream and not from a physical file.

With a quick glance at the API, what you could do is use the PDDocument.save(OutputStream) method to write the file into a byte array in memory, something like this should work.

static byte[] doIt(String message) {
   PDDocument doc = new PDDocument();
   // add the message
   ByteArrayOutputStream baos = new ByteArrayOutputStream();
   doc.save(baos);
   return baos.toByteArray();
}

void main(String args[]) {
   byte[] pdf1 = doIt("hello");
   byte[] pdf2 = doIt("world");
   PDFMergerUtility merger = new PDFMergerUtility();
   merger.addSource(new ByteArrayInputStream(pdf1));
   merger.addSource(new ByteArrayInputStream(pdf2));
   // do the rest with the merger
}