Hi all,
How to merge multiple PDF into a temporary PDF and show on browser?
For example: there are multiple PDF files in c:\pdf, i want to merge them
into one temporary PDF, temporary means don't save in hardisk.
What i am done is: i create a servlet, inside servlet it call another class
to merge PDF, servlet will send file name to the class, the class will
return the PDF to the servlet, servlet will show post the merged PDF to
browser.
I refered to the example give by iText: ProgressServlet, Concatenate.class.
But it is not working. Please give me some advice on my source code. Or
give me your soluction.
Here is my code:
MergePDF.servlet:
...
public void run() {
//use ArrayList save file name, because it may be many file
ArrayList aList = new ArrayList();
aList.add("ChapterSection.pdf");
aList.add("SimpleAnnotations1.pdf");
//call another class to merge PDF
ConcatenateForms merge = new ConcatenateForms();
merge.mergePDF(aList);
}
....
ConcatenateForms.java:
...
public void mergePDF(ArrayList filename) {
...
try {
int pageOffset = 0;
ArrayList master = new ArrayList();
int f = 0;
int count = 0;
count = filename.size();
String outFile = "Merge.pdf";
Document document = null;
PdfCopy writer = null;
while (f < count -1) {
// we create a reader for a certain document
PdfReader reader = new
PdfReader((String)(filename.get(count)));
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 page;
for (int i = 0; i < n; ) {
++i;
page = writer.getImportedPage(reader, i);
writer.addPage(page);
}
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();
}
...
}
Please post your questions to the mailing list instead of to me personally.
Thanks in advance,
Regards
Robin
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