questions.importpages.ConcatenateWithTOC2.java Source code

Introduction

Here is the source code for questions.importpages.ConcatenateWithTOC2.java

Source

/*
 * This example was written by Bruno Lowagie, author of the book
 * 'iText in Action' by Manning Publications (ISBN: 1932394796).
 * You can use this example as inspiration for your own applications.
 * The following license applies:
 * http://www.1t3xt.com/about/copyright/index.php?page=MIT
 */

package questions.importpages;

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfAction;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfDestination;
import com.lowagie.text.pdf.PdfOutline;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
import com.lowagie.text.pdf.PdfWriter;

public class ConcatenateWithTOC2 extends ConcatenateWithTOC {

    public static final String RESULT = "results/questions/importpages/concatenated_with_toc2.pdf";

    public static void main(String[] args) {
        try {
            // suppose we have some TEST PDF files
            for (int i = 0; i < TEST.length; i++) {
                createTestPdf(i);
            }
            // and we want to concatenate them
            Document document = new Document();
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            PdfCopy copy = new PdfCopy(document, os);
            copy.setViewerPreferences(PdfWriter.PageModeUseOutlines);
            document.open();
            // but we want to create an outline tree
            PdfOutline root = copy.getRootOutline();
            // we also want an extra page with the file name
            Document coverpage;
            ByteArrayOutputStream baos;
            PdfReader reader;
            // we want keep track of the page numbers
            int pagenumber = 0;
            for (int i = 0; i < TEST.length; i++) {
                // we create the coverpage in memory
                coverpage = new Document();
                baos = new ByteArrayOutputStream();
                PdfWriter.getInstance(coverpage, baos);
                coverpage.open();
                coverpage.add(new Paragraph("file: " + TEST[i]));
                coverpage.close();
                // we import that page
                reader = new PdfReader(baos.toByteArray());
                pagenumber++;
                copy.addPage(copy.getImportedPage(reader, 1));
                // we create the bookmark to that page
                PdfDestination dest = new PdfDestination(PdfDestination.FIT);
                new PdfOutline(root, PdfAction.gotoLocalPage(pagenumber, dest, copy), TEST[i]);
                // we import the document itself
                reader = new PdfReader(TEST[i]);
                for (int j = 1; j <= reader.getNumberOfPages(); j++) {
                    pagenumber++;
                    copy.addPage(copy.getImportedPage(reader, j));
                }
            }
            document.close();

            // we want to add page X of Y
            reader = new PdfReader(os.toByteArray());
            int n = reader.getNumberOfPages();
            PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(RESULT));
            BaseFont bf = BaseFont.createFont();
            for (int i = 1; i <= n; i++) {
                PdfContentByte canvas = stamper.getOverContent(i);
                canvas.beginText();
                canvas.setFontAndSize(bf, 12);
                canvas.showTextAligned(Element.ALIGN_LEFT, "page " + i + " of " + n, 36, 26, 0);
                canvas.endText();
            }
            stamper.close();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        } catch (DocumentException de) {
            de.printStackTrace();
        }
    }
}