java pdf to add a text watermark

Dependencies used:

<dependency>
   <groupId>com.itextpdf</groupId>
   <artifactId>itextpdf</artifactId>
   <version>5.5.11</version>
</dependency>

<dependency>
   <groupId>com.itextpdf</groupId>
   <artifactId>itext-asian</artifactId>
   <version>5.2.0</version>
</dependency>

 

Code implementation;

 

com.gxever.zvn Package; 

Import com.itextpdf.text.BaseColor; 
Import com.itextpdf.text.Element; 
Import com.itextpdf.text.Rectangle; 
Import com.itextpdf.text.pdf *;. 

Import the java.io. a FileOutputStream; 

/ ** 
* @author Lys 
* @date 2019/8/15 13:39 
* @Version V1.0 
* @Description: 
* / 
public class Test { 

    public static void main (String [] args) throws Exception { 

        Watermark ( "D: \\ pdf \\ 123.pdf ", "D: \\ pdf \\ 123Demo.pdf", " Chi Heng Rui only use the occasion, other invalid"); 
    } 

    / ** 
     * @param you inputFile address PDF file 
     * @param outputFile generate PDF stored after adding a watermark address 
     * @param waterMarkName your watermark 
     * @return 
     * /
    Watermark static Boolean public (inputFile String, 
                                    String the outputFile, String waterMarkName) { 
        the try { 
            PdfReader Reader = new new PdfReader (inputFile); 
            PdfStamper Stamper = new new PdfStamper (Reader, new new a FileOutputStream ( 
                    the outputFile)); 
            // font settings where more critical, this setting supports the Chinese written 
            BaseFont BaseFont.createFont Base = ( "Light-STSong", 
                    "the UCS2-H-UniGB", BaseFont.NOT_EMBEDDED); // system font 
            int reader.getNumberOfPages Total = () +. 1; 

            PdfContentByte an under; 
            the Rectangle pageRect = null; 
            for (int I =. 1; I <Total; I ++) {
                = stamper.getReader pageRect (). 
                        getPageSizeWithRotation (I); 
                // calculate watermark X, Y coordinates 
                a float pageRect.getWidth X = () / 10; 
                a float pageRect.getHeight Y = () / 10-10 of; 
                // get the most PDF top 
                an under stamper.getOverContent = (I); 
                under.saveState (); 
                // sET transparency 
                PdfGState new new PdfGState GS = (); 
                // set transparency 0.2 
                gs.setFillOpacity (1.f); 
                under.setGState (GS); 
                under.restoreState (); 
                under.beginText (); 
                under.setFontAndSize (Base, 60);
                under.setColorFill (BaseColor.ORANGE); 

                // Text watermark inclined at an angle of 45 degrees 
                under.showTextAligned (Element.ALIGN_CENTER 
                        , waterMarkName, X, 
                        Y, 55); 
                // add watermarks text 
                under.endText (); 
                under.setLineWidth ( 1F); 
                under.stroke (); 
            } 
            stamper.close (); 
            return to true; 
        } the catch (Exception E) { 
            e.printStackTrace (); 
            return to false; 
        } 
    } 

}