package com.app.jsonaction;
import java.io.FileOutputStream;
import java.io.IOException;
import com.itextpdf.text.Document;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
public class addSealDemo {
public static void main(String[] args) throws IOException {
addSeal(3, "E:/before.pdf", "E:/S2.png", "E:/after.pdf");
}
/**
* 给PDF上添加图片
* @param 指定要添加图片的pdf页
* @param savePdf原PDF路径
* @param savePng原图片路径
* @param sealPdf新生成PDF路径
* @throws IOException
*/
public static void addSeal(int page, String savePdf, String savePng,
String sealPdf) throws IOException {
int marginLeft = 30;// 左边距
int marginBottom = 100;// 底边距
PdfReader pdfreader = new PdfReader(savePdf);
// 获得PDF总页数
int pdfPage = pdfreader.getNumberOfPages();
if (page <= 0 || page > pdfPage) {
System.out.println("pdf文件无当前页");
}
// 获取指定页的宽和高
Document document = new Document(pdfreader.getPageSize(page));
// 获取页面宽度
float width = document.getPageSize().getWidth();
// 获取页面高度
float height = document.getPageSize().getHeight();
if (pdfreader != null)
pdfreader.close();
if (document != null)
document.close();
System.out.println("pdfPage=" + pdfPage + ",width = " + width
+ ", height = " + height);
PdfReader pdf = new PdfReader(savePdf);
PdfStamper stamper = null;
try {
stamper = new PdfStamper(pdf, new FileOutputStream(sealPdf));// 生成的PDF
PdfContentByte overContent = stamper.getOverContent(page);
Image image = Image.getInstance(savePng);// 图片名称
image.setAbsolutePosition(marginLeft, marginBottom);// 左边距、底边距
overContent.addImage(image);
overContent.stroke();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (null != stamper) {
stamper.close();
}
if (pdf != null) {
pdf.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
