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

I use this to merge some documents (InputStreams) and write the merged document in a HttpServletResponse.

  PDFMergerUtility mergedDoc = new PDFMergerUtility();
  ByteArrayOutputStream colDocOutputstream = new ByteArrayOutputStream();

  for (int i = 0; i < documentCount; i++)
  {
    ByteArrayOutputStream tempZipOutstream = new ByteArrayOutputStream();
...
    mergedDoc.addSource(new ByteArrayInputStream(tempZipOutstream.toByteArray()));
  }

  mergedDoc.setDestinationStream(colDocOutputstream);
  mergedDoc.mergeDocuments();

  response.setContentLength(colDocOutputstream.size());
  response.setContentType("application/pdf");
  response.setHeader("Content-Disposition", "attachment; filename=mergedDocument.pdf");
  response.setHeader("Pragma", "public");
  response.setHeader("Cache-Control", "max-age=0");
  response.addDateHeader("Expires", 0);
  response.getOutputStream().write(colDocOutputstream.toByteArray());