pdf加水印

pdf加水印

1. 相关jar包

   • itext-2.1.7.jar
   • iTextAsian.jar

2. 代码如下

package com.solex.waterPrint;

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 java.util.Date;

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.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
/** * 给PDF添加水印 * @author solexit06 * */
public class TestWaterPdf {
    public static void main(String[] args) throws DocumentException,IOException {
        //要输出的文件
        String outFile="C:/Users/solexit06/Desktop/WaterPrint.pdf";
        //要加水印的原文件
        String inputFile="C:/Users/solexit06/Desktop/testWaterPrint.pdf";
        //水印内容:公司、日期、内容
        String company="**科技有限公司";
        Date date = Calendar.getInstance().getTime();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String waterMarkDate=sdf.format(date);
        String content="受控文件";
        // 将文件先加水印然后输出
        setWatermark(outFile,inputFile,company,waterMarkDate,content);
    }

    public static void setWatermark(String outFile, String inputFile,String company,
            String waterMarkDate,String content) throws DocumentException,IOException {

        PdfReader reader = new PdfReader(inputFile);//获取需要加水印的输入文件
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(outFile)));
        PdfStamper stamper = new PdfStamper(reader, bos);

        int total = reader.getNumberOfPages();//获取输入文件页数
        for (int i = 1; i <= total; i++) {
    
            PdfContentByte contentOver = stamper.getOverContent(i);//在内容上方加水印
            /*添加图片水印*/
            String imgUrl="C:/Users/solexit06/Desktop/Border.png";
            Image img = Image.getInstance(imgUrl);//获取要作为水印的图片
            img.setAbsolutePosition(200, 450);//图片距离文档的左下边距
            img.scaleToFit(150, 240);//图片水印的大小
            img.setRotationDegrees(10);//旋转
            contentOver.addImage(img);//添加图片水印

            /*添加文字水印*/
            contentOver.beginText();
            BaseFont bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.EMBEDDED);//字体实例，影响中文字体显示
            contentOver.setColorFill(Color.RED);//水印颜色

            contentOver.setFontAndSize(bf, 16);//字体样式和大小
            contentOver.showTextAligned(Element.ALIGN_LEFT, company, 215, 520,10);//左边距、下边距

            contentOver.setFontAndSize(bf, 10);//字体样式和大小
            contentOver.showTextAligned(Element.ALIGN_LEFT, waterMarkDate, 260, 505,10);//左边距、下边距

            contentOver.setFontAndSize(bf, 24);//字体样式和大小
            contentOver.showTextAligned(Element.ALIGN_LEFT, content, 240, 465,10);//左边距、下边距
            contentOver.endText();

        }
        stamper.close();
        System.out.println("添加水印成功");
    }
}