Concatenate Two PDFs in a JSP using iText

This is an adaptation of the stand alone java file on the iText website to JSP:

<%@page import="java.io.FileOutputStream,
 java.util.ArrayList,
 java.util.List,

 com.lowagie.text.Document,
 com.lowagie.text.pdf.PRAcroForm,
 com.lowagie.text.pdf.PdfCopy,
 com.lowagie.text.pdf.PdfImportedPage,
 com.lowagie.text.pdf.PdfReader,
 com.lowagie.text.pdf.SimpleBookmark" %><%
try {
                int pageOffset = 0;
                ArrayList master = new ArrayList();
                int f = 0;
                String outFile = "/tmp/ouputPDF.pdf";
                Document document = null;
                PdfCopy  writer = null;
                while (f < 2) {
                    // we create a reader for a certain document
                    PdfReader reader = null;
                    if( f == 0) reader = new PdfReader(application.getRealPath("/Page1.pdf"));
                        else
                                reader = new PdfReader(application.getRealPath("/Page2.pdf"));
                    reader.consolidateNamedDestinations();
                    // we retrieve the total number of pages
                    int n = reader.getNumberOfPages();
                    List bookmarks = SimpleBookmark.getBookmark(reader);
                    if (bookmarks != null) {
                        if (pageOffset != 0)
                            SimpleBookmark.shiftPageNumbers(bookmarks, pageOffset, null);
                        master.addAll(bookmarks);
                    }
                    pageOffset += n;

                    if (f == 0) {
                        // step 1: creation of a document-object
                        document = new Document(reader.getPageSizeWithRotation(1));
                        // step 2: we create a writer that listens to the document
                        writer = new PdfCopy(document, new FileOutputStream(outFile));
                        // step 3: we open the document
                        document.open();
                    }
                    // step 4: we add content
                    PdfImportedPage ppage;
                    for (int i = 0; i < n; ) {
                        ++i;
                        ppage = writer.getImportedPage(reader, i);
                        writer.addPage(ppage);
                    }
                    PRAcroForm form = reader.getAcroForm();
                    if (form != null)
                        writer.copyAcroForm(reader);
                    f++;
                }
                if (master.size() > 0)
                    writer.setOutlines(master);
                // step 5: we close the document
                document.close();
            }
            catch(Exception e) {
                e.printStackTrace();
            }
%>