java 为pdf添加水印图片

来源：互联网发布：绵阳java程序员工资编辑：程序博客网时间：2024/06/05 10:51

首先需要引入两个Jar包分别是：iTextAsian.jar 、itext-2.1.7.jar 可以去 http://download.csdn.net/detail/work201003/9227159 下载；

代码：

import java.awt.Color;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Calendar;import com.lowagie.text.DocumentException;import com.lowagie.text.Element;import com.lowagie.text.Image;import com.lowagie.text.PageSize;import com.lowagie.text.pdf.BaseFont;import com.lowagie.text.pdf.PdfContentByte;import com.lowagie.text.pdf.PdfGState;import com.lowagie.text.pdf.PdfReader;import com.lowagie.text.pdf.PdfStamper;public class TestWaterPrint {public static void main(String[] args) throws DocumentException,IOException {// 要输出的pdf文件BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File("E:/abc.pdf")));Calendar cal = Calendar.getInstance();SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");// 将pdf文件先加水印然后输出setWatermark(bos, "D:/itext.pdf", format.format(cal.getTime())+ "  下载使用人：" + "测试user", 16);}public static void setWatermark(BufferedOutputStream bos, String input,String waterMarkName, int permission) throws DocumentException,IOException {PdfReader reader = new PdfReader(input);PdfStamper stamper = new PdfStamper(reader, bos);int total = reader.getNumberOfPages() + 1;PdfContentByte content;BaseFont base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.EMBEDDED);PdfGState gs = new PdfGState();for (int i = 1; i < total; i++) {content = stamper.getOverContent(i);// 在内容上方加水印    //content = stamper.getUnderContent(i);//在内容下方加水印gs.setFillOpacity(0.2f);// content.setGState(gs);content.beginText();content.setColorFill(Color.LIGHT_GRAY);content.setFontAndSize(base, 50);content.setTextMatrix(70, 200);content.showTextAligned(Element.ALIGN_CENTER, "公司内部文件，请注意保密！", 300,350, 55);Image image = Image.getInstance("D:/itext2.png");/*img.setAlignment(Image.LEFT | Image.TEXTWRAP);img.setBorder(Image.BOX);img.setBorderWidth(10);img.setBorderColor(BaseColor.WHITE);img.scaleToFit(1000, 72);//大小img.setRotationDegrees(-30);//旋转 */image.setAbsolutePosition(200, 206); // set the first background image of the absolute image.scaleToFit(200,200);content.addImage(image);content.setColorFill(Color.BLACK);content.setFontAndSize(base, 8);content.showTextAligned(Element.ALIGN_CENTER, "下载时间："+ waterMarkName + "", 300, 10, 0);content.endText();}stamper.close();}}

原文档图

效果图：

更多详细代码请查看：http://www.open-open.com/lib/view/open1339726488115.html

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