asked on

PDF Concatenate problem

hello Experts ,
I have 2 PDF files , I need to append the content of one file to the of the other file ,
if the two PDF files are output file and scr file ,
The prog needs to read from scr file and add the content to the output file at a specified page . currently I am using a Itext sample prog to do it ,
The only problem is that the content of the output file is completely over-written by the scr file , and the output file becomes a copy of the scr file .

public boolean PdfConcatenate(int start_page,FormFile scr_filename) {

      System.out.println("PdfCopy example");
try {
int pageOffset = 0;
ArrayList master = new ArrayList();
int f = 0;

                  /**
                   * Get output file from location at which cool file is downloaded to
                  **/

String outFile = "Z:\\pdf\\app\\coolpdffiles\\716048.PDF";
Document document = null;
PdfCopy writer = null;

// we create a reader for a certain document
PdfReader reader = new PdfReader(scr_filename.getInputStream());
reader.consolidateNamedDestinations();
// we retrieve the total number of pages
int n = reader.getNumberOfPages();
pageOffset += n;
List bookmarks = SimpleBookmark.getBookmark(reader);
if (bookmarks != null) {
if (pageOffset != 0)
     SimpleBookmark.shiftPageNumbers(bookmarks, pageOffset, null);
      master.addAll(bookmarks);
}

// 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 = start_page; i < n; ) {
++i;
page = writer.getImportedPage(reader, i);
writer.addPage(page);
}
PRAcroForm form = reader.getAcroForm();
if (form != null)
writer.copyAcroForm(reader);

if (master.size() > 0)
writer.setOutlines(master);
// step 5: we close the document
      document.close();
      return true;
}
catch(Exception e) {
e.printStackTrace();
return false;
}

plz advice

eldoz12

ASKER

Experts plz advice

ASKER CERTIFIED SOLUTION

Mayank S

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Mayank S

Also, you should be maintaining a reference to the FileOutputStream and closing it in a finally block.

eldoz12

ASKER

I will try what u asked me to ....

eldoz12

ASKER

>>> Try new FileOutputStream ( outFile, true )
I tried this but still same effect , Its overwrite of the entier output file and not a append

eldoz12

ASKER

plz advice

eldoz12

ASKER

mayankeagle , i checked the api and the advice you gave looks correct , but for some reason , I am still having a problem

fargo

i believe, the start_page parameter is not correctly handled.
Try debugging the start_page handling..here

for (int i = start_page; i < n; ) {
++i;
page = writer.getImportedPage(reader, i);
writer.addPage(page);
}

see what page is getting processed and added.

Otherwise all looks fine.

fargo

eldoz12

ASKER

the start_page here is used to read from the src_file , it just say that start reading from the (start_page) in the src_file ,
Like if the person wants to append the scr_file from the 3 rd page then it starts reading from the 3 rd page .

Mayank S

So that worked?