Clipping pages in an existing PDF

This is a code example of iText PDF, discover more.

30th October 2015
admin-marketing

iText 5 is no longer being developed, except for security fixes. Click the following link to see an updated example for iText 7.

This example was written in answer to the question How to crop out a part of PDF file?

ClipPdf.java
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/**
 * Example written by Bruno Lowagie in answer to:
 * http://stackoverflow.com/questions/26773942/itext-crop-out-a-part-of-pdf-file
 */
package sandbox.stamper;
 
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfArray;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
 
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Locale;
 
import sandbox.WrapToTest;
 
@WrapToTest
public class ClipPdf {
 
    public static final String SRC = "resources/pdfs/hero.pdf";
    public static final String DEST = "results/stamper/hero_clipped.pdf";
 
    public static void main(String[] args) throws IOException, DocumentException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new ClipPdf().manipulatePdf(SRC, DEST);
    }
 
    public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
        PdfReader reader = new PdfReader(src);
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
        int n = reader.getNumberOfPages();
        PdfDictionary page;
        PdfArray media;
        for (int p = 1; p <= n; p++) {
            page = reader.getPageN(p);
            media = page.getAsArray(PdfName.CROPBOX);
            if (media == null) {
                media = page.getAsArray(PdfName.MEDIABOX);
            }
            float llx = media.getAsNumber(0).floatValue() + 200;
            float lly = media.getAsNumber(1).floatValue() + 200;
            float w = media.getAsNumber(2).floatValue() - media.getAsNumber(0).floatValue() - 400;
            float h = media.getAsNumber(3).floatValue() - media.getAsNumber(1).floatValue() - 400;
            String command = String.format(Locale.ROOT,
                    "\nq %.2f %.2f %.2f %.2f re W n\nq\n",
                    llx, lly, w, h);
            stamper.getUnderContent(p).setLiteral(command);
            stamper.getOverContent(p).setLiteral("\nQ\nQ\n");
        }
        stamper.close();
        reader.close();
    }
}


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