Picture Add watermark (Java implementation)

Some scenarios require a watermark to protect against misappropriation, such as Weibo user images. The implementation of adding watermarks in Java requires the use of BufferedImage, graphics2d, and ImageIO classes. 1. Add text watermark

Import Java.awt.AlphaComposite;
Import Java.awt.Color;
Import Java.awt.Font;
Import Java.awt.Graphics2D;
Import Java.awt.Image;
Import java.awt.RenderingHints;
Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import Java.io.FileOutputStream;
Import Java.io.OutputStream;

Import Javax.imageio.ImageIO;  /** * Add text watermark * * @author Ricky Fung/public class Textmarkprocessor {/** * @param args/Public
    static void Main (string[] args) {new Textmarkprocessor (). Testtextmark ();
        public void Testtextmark () {File Srcimgfile = new file ("D:/test/desktop.png");

        String logotext = "[Angel's Wings]";

        File Outputrotateimagefile = new file ("D:/test/desktop_text_mark.jpg");
    Createwatermarkbytext (Srcimgfile, Logotext, Outputrotateimagefile, 0); public void Createwatermarkbytext (File srcimgfile, String Logotext, Fi Le Outputimagefile, double degree) {OutputStream OS = null;

            try {Image srcimg = Imageio.read (srcimgfile); BufferedImage buffimg = new BufferedImage (Srcimg.getwidth (null), srcimg.getheight (null), BufferedImage .

            TYPE_INT_RGB);
            Graphics2D graphics = Buffimg.creategraphics (); Graphics.setrenderinghint (Renderinghints.key_interpolation, Renderinghints.value_interpolation_bilinea
            R); Graphics.DrawImage (srcimg.getscaledinstance (Srcimg.getwidth (null), srcimg.getheight (null), Ima Ge.

            Scale_smooth), 0, 0, NULL); if (degree>0) {graphics.rotate (Math.toradians (degree), (double) buffimg.getwid
            Th ()/2, (Double) buffimg.getheight ()/2);
            } graphics.setcolor (color.red);

            Graphics.setfont (New Font ("Song Body", Font.Bold, 36));
            float alpha = 0.8f; Graphics.setcomposite (Alphacomposite.getInstance (Alphacomposite.src_atop, Alpha));
            Graphics.DrawString (Logotext, Buffimg.getwidth ()/3, Buffimg.getheight ()/2);

            Graphics.dispose ();
            OS = new FileOutputStream (outputimagefile);
        Generate Picture Imageio.write (buffimg, "JPG", OS);
        catch (Exception e) {e.printstacktrace ();
            Finally {try {if (null!= OS) os.close ();
            catch (Exception e) {e.printstacktrace (); }
        }
    }
}

2. Add a picture watermark

Import Java.awt.AlphaComposite;
Import Java.awt.Graphics2D;
Import Java.awt.Image;
Import java.awt.RenderingHints;
Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import Java.io.FileOutputStream;
Import Java.io.OutputStream;
Import Javax.imageio.ImageIO;

Import Javax.swing.ImageIcon; /** * Add Picture watermark * * @author Ricky Fung/public class Picturemarkprocessor {/** * @param args/Pub
    Lic static void Main (string[] args) {new Picturemarkprocessor (). Testpicturemark ();
        public void Testpicturemark () {File Srcimagefile = new file ("D:/test/desktop.png");

        File Logoimagefile = new file ("D:/test/tools.png");

        File Outputroateimagefile = new file ("D:/test/desktop_pic_mark.jpg");
    Createwatermarkbyicon (Srcimagefile, Logoimagefile, Outputroateimagefile, 0);
                                             } public void Createwatermarkbyicon (file srcimagefile, file Logoimagefile, File Outputimagefile, doubledegree) {outputstream OS = null;

            try {Image srcimg = Imageio.read (srcimagefile); BufferedImage buffimg = new BufferedImage (Srcimg.getwidth (null), srcimg.getheight (null), BufferedImage .

            TYPE_INT_RGB);
            Graphics2D graphics = Buffimg.creategraphics ();
            Graphics.setrenderinghint (Renderinghints.key_interpolation, renderinghints.value_interpolation_bilinear); Graphics.DrawImage (srcimg.getscaledinstance (Srcimg.getwidth (null), srcimg.getheight (null), Ima Ge.

            Scale_smooth), 0, 0, NULL);
            ImageIcon Logoimgicon = new ImageIcon (Imageio.read (logoimagefile));

            Image logoimg = Logoimgicon.getimage (); Rotate if (degree>0) {graphics.rotate (Math.toradians (degree), DOUBL
            e) Buffimg.getwidth ()/2, (Double) buffimg.getwidth ()/2); float Alpha = 0.8f;

            Transparency Graphics.setcomposite (Alphacomposite.getinstance (alphacomposite.src_atop, Alpha));
            Watermark Position Graphics.DrawImage (logoimg, Buffimg.getwidth ()/3, Buffimg.getheight ()/2, NULL);
            Graphics.setcomposite (Alphacomposite.getinstance (alphacomposite.src_over));

            Graphics.dispose ();
            OS = new FileOutputStream (outputimagefile);
        Generate Picture Imageio.write (buffimg, "JPG", OS);
        catch (Exception e) {e.printstacktrace ();
            Finally {try {if (null!= OS) os.close ();
            catch (Exception e) {e.printstacktrace ();
 }
        }
    }
}

The implementation effect is as follows:

Original:

Add text watermark:

Add Image watermark: