[Java] 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);
 
 }
 
}