CONCATÉNATION DE DEUX PDF

package fact;

import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.PRAcroForm;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.SimpleBookmark;

/**
 * Permet la concaténation de deux PDF en un.
 * 
 * @author Johann Pons
 */
public class Concatenate {

    public static void main(String args[]) {
        args = new String[]{"c:\\ccn.pdf", "c:\\trame.pdf", "c:\\out.pdf"};

        try {
            int pageOffset = 0;
            ArrayList master = new ArrayList();
            int f = 0;
            String outFile = args[args.length - 1];
            Document document = null;
            PdfCopy writer = null;
            while (f < args.length - 1) {
                PdfReader reader = new PdfReader(args[f]);
                reader.consolidateNamedDestinations();
                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) {
                    document = new Document(reader.getPageSizeWithRotation(1));
                    writer = new PdfCopy(document, new FileOutputStream(outFile));
                    document.open();
                }
                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.isEmpty()) {
                writer.setOutlines(master);
            }
            document.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}