java给pdf打水印

逃离我推掉我的手 2023-10-06 19:47 13阅读 0赞

![在这里插入图片描述][622e9c1224794b51a78238d2f2cc460f.png]

package test3;
    
    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.itextpdf.text.BaseColor;
    import com.itextpdf.text.DocumentException;
    import com.itextpdf.text.Element;
    import com.itextpdf.text.Image;
    import com.itextpdf.text.pdf.BaseFont;
    import com.itextpdf.text.pdf.PdfContentByte;
    import com.itextpdf.text.pdf.PdfGState;
    import com.itextpdf.text.pdf.PdfReader;
    import com.itextpdf.text.pdf.PdfStamper;
    
    public class test2 {
        
    	public static void main(String[] args) throws DocumentException, IOException {
        
    		// 将E:/itext.pdf文件加水印输出E:/abc.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, "E:/itext.pdf", format.format(cal.getTime()) + "  下载使用人：" + "测试user", 16);
    	}
    
    	// 加水印函数
    	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(BaseColor.LIGHT_GRAY);
    			content.setFontAndSize(base, 50);
    			content.setTextMatrix(70, 200);
    			content.showTextAligned(Element.ALIGN_CENTER, "BYD公司内部文件，请注意保密！", 300, 350, 55);
    			Image image = Image.getInstance("E:/受_控.jpg");
    			/*
    			 * 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(BaseColor.BLACK);
    			content.setFontAndSize(base, 8);
    			content.showTextAligned(Element.ALIGN_CENTER, "下载时间：" + waterMarkName + "", 300, 10, 0);
    			content.endText();
    
    		}
    		stamper.close();
    	}
    }

[622e9c1224794b51a78238d2f2cc460f.png]: https://img-blog.csdnimg.cn/622e9c1224794b51a78238d2f2cc460f.png