实例讲解Java处理PDF图章的方法

import com.spire.pdf.FileFormat;

import com.spire.pdf.PdfDocument;

import com.spire.pdf.PdfPageBase;

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) {

 

  //创建PdfDocument对象，加载PDF测试文档

  PdfDocument doc = new PdfDocument();

  doc.loadFromFile("test.pdf");

 

  //获取文档第3页

  PdfPageBase page = doc.getPages().get(2);

 

  //加载印章图片

  PdfImage image = PdfImage.fromFile("stamp.png");

  //获取印章图片的宽度和高度

  int width = image.getWidth();

  int height = image.getHeight();

 

  //创建PdfTemplate对象

  PdfTemplate template = new PdfTemplate(width, height);

  //将图片绘制到模板

  template.getGraphics().drawImage(image, 0, 0, width, height);

 

  //创建PdfRubebrStampAnnotation对象，指定大小和位置

  Rectangle2D rect = new Rectangle2D.Float((float) (page.getActualSize().getWidth() - width - 10), (float) (page.getActualSize().getHeight() - height - 60), width, height);

  PdfRubberStampAnnotation stamp = new PdfRubberStampAnnotation(rect);

 

  //创建PdfAppearance对象

  PdfAppearance pdfAppearance = new PdfAppearance(stamp);

  //将模板应用为PdfAppearance的一般状态

  pdfAppearance.setNormal(template);

  //将PdfAppearance 应用为图章的样式

  stamp.setAppearance(pdfAppearance);

 

  //添加图章到PDF

  page.getAnnotationsWidget().add(stamp);

 

  //保存文档

  doc.saveToFile("ImageStamp.pdf",FileFormat.PDF);

 }

}

import com.spire.pdf.PdfDocument;

import com.spire.pdf.PdfPageBase;

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 DynamicStamp {

 

 public static void main(String[] args) {

 

  //创建PdfDocument对象

  PdfDocument document = new PdfDocument();

 

  //加载PDF文档

  document.loadFromFile("test.pdf");

 

  //获取第3页

  PdfPageBase page = document.getPages().get(2);

 

  //创建PdfTamplate对象

  PdfTemplate template = new PdfTemplate(185, 50);

 

  //创建两种字体

  PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("Arial Unicode MS", Font.PLAIN ,15), true);

  PdfTrueTypeFont font2 = new PdfTrueTypeFont(new Font("Arial Unicode MS", Font.PLAIN ,10), true);

 

  //创建画刷

  PdfSolidBrush solidBrush = new PdfSolidBrush(new PdfRGBColor(Color.blue));

  Rectangle2D rect1 = new Rectangle2D.Float();

  rect1.setFrame(new Point2D.Float(0,0),template.getSize());  

 

  //创建圆角矩形路径

  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);

 

  //绘制路径到模板，并进行填充  

  template.getGraphics().drawPath(PdfPens.getBlue(), path);

 

  //在模板上绘制文字及动态日期

  String s1 = "已审核\n";

  String s2 = "社区管理中心 " + 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));

 

  //创建PdfRubberStampAnnotation对象，并指定其位置和大小

  Rectangle2D rect2= new Rectangle2D.Float();

  rect2.setFrame(new Point2D.Float((float)(page.getActualSize().getWidth()-250),(float)(page.getActualSize().getHeight()-150)), template.getSize());

  PdfRubberStampAnnotation stamp = new PdfRubberStampAnnotation(rect2);

 

  //创建PdfAppearance对象，应用模板为一般状态

  PdfAppearance appearance = new PdfAppearance(stamp);

  appearance.setNormal(template);

 

  //应用样式到图章

  stamp.setAppearance(appearance);

 

  //添加图章到Annotation集合

  page.getAnnotationsWidget().add(stamp);

 

  //保存文档

  document.saveToFile("DynamicStamp.pdf");

  document.close();

 }

 

 //将日期转化成字符串

 public static String dateToString(java.util.Date poDate,String pcFormat) {

  SimpleDateFormat loFormat = new SimpleDateFormat(pcFormat);

  return loFormat.format(poDate);

 }

}