PDF Document Merger

Sometimes, you have to merge PDF documents. The PDF Document Merger combines PDF documents and optionally adds page numbering to the merged document. In this section we'll merge catalog.pdf and catalog2.pdf, which we generated in the previous sections.

1. 1. First, create an InputStream array from the catalog.pdf and catalog2.pdf reports.

   FileInputStream[] inputStreams = new FileInputStream[2];
   inputStreams[0] = new FileInputStream("catalog.pdf");
   inputStreams[1] = new FileInputStream("catalog2.pdf");
   

2. 2. Create a FileOutputStream object for the merged PDF document.

   FileOutputStream outputStream = new FileOutputStream( "catalog3.pdf");
   

3. 3. Merge the PDF documents with the PDFDocMerger class.

   PDFDocMerger pdfMerger = new PDFDocMerger(inputStreams, outputStream);
   

4. 4. To add page numbering, specify the page numbering coordinates using the setPageNumberCoordinates method, and set the page numbering font using the setPagNumberFontInfo method.

   pdfMerger.setPageNumberCoordinates(300,...