Add Image or Text Stamps to PDF in Java

PDF stamps are often used in contracts, reports and restricted materials, to prove that the documents have been reviewed and marked as "read", "qualified", or "confidential", etc. This article will show you how we can add image stamps and text stamps to PDF documents by using Free Spire.PDF for Java.

Add Image Stamp

import com.spire.pdf.annotations.PdfRubberStampAnnotation;
import com.spire.pdf.annotations.appearance.PdfAppearance;
import com.spire.pdf.graphics.PdfImage;
import com.spire.pdf.graphics.PdfTemplate;

import java.awt.geom.Rectangle2D;

public class ImageStamp {

    public static void main(String[] args) {

        //create a PdfDocument object
        PdfDocument doc = new PdfDocument();

        //load a PDF document
        doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\sample.pdf");

        //get the last page
        PdfPageBase page = doc.getPages().get(doc.getPages().getCount()-1);

        //load an image file
        PdfImage image = PdfImage.fromFile("C:\\Users\\Administrator\\Desktop\\100-percent-original-stamp.png");

        //get the width and height of the image
        int width = image.getWidth();
        int height = image.getHeight();

        //create a PdfTemplate object based on the size of the image
        PdfTemplate template = new PdfTemplate(width, height);

        //draw image on the template
        template.getGraphics().drawImage(image, 0, 0, width, height);

        //create a rubber stamp annotation, specifying its location and position
        Rectangle2D rect = new Rectangle2D.Float((float) (page.getActualSize().getWidth() - width - 50), (float) (page.getActualSize().getHeight() - height - 80), width, height);
        PdfRubberStampAnnotation stamp = new PdfRubberStampAnnotation(rect);

        //create a PdfAppearance object
        PdfAppearance pdfAppearance = new PdfAppearance(stamp);

        //set the template as the normal state of the appearance
        pdfAppearance.setNormal(template);

        //the appearance to the stamp
        stamp.setAppearance(pdfAppearance);

        //add the stamp annotation to PDF
        page.getAnnotationsWidget().add(stamp);

        //save the file
        doc.saveToFile("output/AddImageStamp.pdf");
        doc.close();
    }
}

output:

Add Text Stamp

import com.spire.pdf.annotations.PdfRubberStampAnnotation;
import com.spire.pdf.annotations.appearance.PdfAppearance;
import com.spire.pdf.graphics.*;

import java.awt.*;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.text.SimpleDateFormat;

public class TextStamp {

    public static void main(String[] args) {

        //create a PdfDocument object
        PdfDocument document = new PdfDocument();

        //load a PDF file
        document.loadFromFile("C:\\Users\\Administrator\\Desktop\\sample.pdf");

        //get the last page
        PdfPageBase page = document.getPages().get(document.getPages().getCount()-1);

        //create a pdf template
        PdfTemplate template = new PdfTemplate(185, 50);

        //create two fonts
        PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("Elephant", Font.ITALIC,16), true);
        PdfTrueTypeFont font2 = new PdfTrueTypeFont(new Font("Arial", Font.ITALIC  ,10), true);


        //create a solid brush and a gradient brush
        PdfSolidBrush solidBrush = new PdfSolidBrush(new PdfRGBColor(Color.blue));
        Rectangle2D rect1 = new Rectangle2D.Float();
        rect1.setFrame(new Point2D.Float(0,0),template.getSize());
        PdfLinearGradientBrush linearGradientBrush = new PdfLinearGradientBrush(rect1,new PdfRGBColor(Color.white),new PdfRGBColor(Color.orange),PdfLinearGradientMode.Horizontal);

        //create rounded rectangle path
        int CornerRadius = 20;
        PdfPath path = new PdfPath();
        path.addArc(template.getBounds().getX(), template.getBounds().getY(), CornerRadius, CornerRadius, 180, 90);
        path.addArc(template.getBounds().getX() + template.getWidth() - CornerRadius,template.getBounds().getY(), CornerRadius, CornerRadius, 270, 90);
        path.addArc(template.getBounds().getX() + template.getWidth() - CornerRadius, template.getBounds().getY()+ template.getHeight() - CornerRadius, CornerRadius, CornerRadius, 0, 90);
        path.addArc(template.getBounds().getX(), template.getBounds().getY() + template.getHeight() - CornerRadius, CornerRadius, CornerRadius, 90, 90);
        path.addLine( template.getBounds().getX(), template.getBounds().getY() + template.getHeight() - CornerRadius, template.getBounds().getX(), template.getBounds().getY() + CornerRadius / 2);

        //draw path on the template
        template.getGraphics().drawPath(linearGradientBrush, path);
        template.getGraphics().drawPath(PdfPens.getBlue(), path);

        //draw dynamic text on the template
        String s1 = "DENIED\n";
        String s2 = "By John " + dateToString(new java.util.Date(),"yyyy-MM-dd HH:mm:ss");
        template.getGraphics().drawString(s1, font1, solidBrush, new Point2D.Float(5, 5));
        template.getGraphics().drawString(s2, font2, solidBrush, new Point2D.Float(5, 28));

        //create a rubber stamp, specifying its size and location
        Rectangle2D rect2= new Rectangle2D.Float();
        rect2.setFrame(new Point2D.Float((float)(page.getActualSize().getWidth()-250),(float)(page.getActualSize().getHeight()-120)),  template.getSize());
        PdfRubberStampAnnotation stamp = new PdfRubberStampAnnotation(rect2);

        //create a PdfAppearance object and apply the template as its normal state
        PdfAppearance appearance = new PdfAppearance(stamp);
        appearance.setNormal(template);

        //apply the appearance to stamp
        stamp.setAppearance(appearance);

        //add the stamp annotation to annotation collection
        page.getAnnotationsWidget().add(stamp);

        //save the file
        document.saveToFile("output/AddTextStamp.pdf");
        document.close();
    }

    //convert date to string
    public static String dateToString(java.util.Date poDate,String pcFormat) {
        SimpleDateFormat loFormat = new SimpleDateFormat(pcFormat);
        return loFormat.format(poDate);
    }
}

output: