Штампы PDF часто используются в контрактах, отчетах и материалах с ограниченным доступом, чтобы доказать, что документы были просмотрены и помечены как “прочитанные”, “квалифицированные” или “конфиденциальные” и т.д. В этой статье мы покажем вам, как мы можем добавлять графические штампы и текстовые штампы в PDF-документы с помощью Free Spire.PDF для Java .
Добавить Штамп изображения
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(); } }
выход:
Добавить Текстовый штамп
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); } }
выход:
Оригинал: “https://dev.to/eiceblue/add-image-or-text-stamps-to-pdf-in-java-2p7g”