为PDF添加水印后导出

package com.qlzx.utils;

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.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;
/**

  • 为PDF添加水印后导出
  • iTextAsian-1.0.jar 依赖这个文件会报字体错误,手动打包到本地厂库
  • @author Liang Qizhao

*/
public class TestWaterPrint {
public static void main(String[] args) throws DocumentException,
IOException {
long start = System.currentTimeMillis();
// 要输出的pdf文件
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(“C:\Users\Liang Qizhao\Desktop\劳动合同水印.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, “C:\Users\Liang Qizhao\Desktop\劳动合同.pdf”, format.format(cal.getTime())
+ " 下载使用人:" + “测试user”, 16);
long end = System.currentTimeMillis();
System.out.println((end-start));
}

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("C:\\Users\\Liang Qizhao\\Desktop\\1.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();
}

}

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