Java images add watermark instance code sharing
- 2020-04-01 04:34:38
- OfStack
This article introduced the Java image to add watermark instance code, Java watermark is very convenient, watermark can be a picture or text, the specific content is as follows
package michael.io.image;
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.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageDecoder;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
/**
* Image watermarking
* @blog http://sjsky.iteye.com
* @author Michael
*/
public class ImageMarkLogoByIcon {
public static void main(String[] args) {
String srcImgPath = "d:/test/michael/myblog_01.png";
String iconPath = "d:/test/michael/blog_logo.png";
String targerPath = "d:/test/michael/img_mark_icon.jpg";
String targerPath2 = "d:/test/michael/img_mark_icon_rotate.jpg";
//Add a watermark to the image
ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath);
//Add watermark to the picture, watermark rotation -45
ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath2,
-45);
}
public static void markImageByIcon(String iconPath, String srcImgPath,
String targerPath) {
markImageByIcon(iconPath, srcImgPath, targerPath, null);
}
public static void markImageByIcon(String iconPath, String srcImgPath,
String targerPath, Integer degree) {
OutputStream os = null;
try {
Image srcImg = ImageIO.read(new File(srcImgPath));
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),
srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);
//Get the brush object
// Graphics g= buffImg.getGraphics();
Graphics2D g = buffImg.createGraphics();
//Sets the jagged edge of the line segment
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg
.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);
if (null != degree) {
//Set watermark rotation
g.rotate(Math.toRadians(degree),
(double) buffImg.getWidth() / 2, (double) buffImg
.getHeight() / 2);
}
//Watermark image path watermark is usually GIF or PNG, so you can set the transparency
ImageIcon imgIcon = new ImageIcon(iconPath);
//I get the Image object.
Image img = imgIcon.getImage();
float alpha = 0.5f; //transparency
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha));
//Represents the position of the watermark image
g.drawImage(img, 150, 300, null);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
g.dispose();
os = new FileOutputStream(targerPath);
//Generate images
ImageIO.write(buffImg, "JPG", os);
System.out.println(" Picture added Icon Seal... ");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (null != os)
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
Here's another example:
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import javax.imageio.ImageIO;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public final class ImageUtils {
public ImageUtils() {
}
/**
* public final static String getPressImgPath() { return ApplicationContext
* .getRealPath("/template/data/util/shuiyin.gif"); }
*/
public final static void pressImage(String pressImg, String targetImg,
int x, int y) {
try {
//The target file
File _file = new File(targetImg);
Image src = ImageIO.read(_file);
int wideth = src.getWidth(null);
int height = src.getHeight(null);
BufferedImage image = new BufferedImage(wideth, height,
BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.drawImage(src, 0, 0, wideth, height, null);
//Watermark file
File _filebiao = new File(pressImg);
Image src_biao = ImageIO.read(_filebiao);
int wideth_biao = src_biao.getWidth(null);
int height_biao = src_biao.getHeight(null);
g.drawImage(src_biao, (wideth - wideth_biao) / 2,
(height - height_biao) / 2, wideth_biao, height_biao, null);
//Watermark file The end of the
g.dispose();
FileOutputStream out = new FileOutputStream(targetImg);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void pressText(String pressText, String targetImg,
String fontName, int fontStyle, int color, int fontSize, int x,
int y) {
try {
File _file = new File(targetImg);
Image src = ImageIO.read(_file);
int wideth = src.getWidth(null);
int height = src.getHeight(null);
BufferedImage image = new BufferedImage(wideth, height,
BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.drawImage(src, 0, 0, wideth, height, null);
g.setColor(Color.RED);
g.setFont(new Font(fontName, fontStyle, fontSize));
g.drawString(pressText, wideth - fontSize - x, height - fontSize
/ 2 - y);
g.dispose();
FileOutputStream out = new FileOutputStream(targetImg);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
} catch (Exception e) {
System.out.println(e);
}
}
public static void main(String[] args) {
pressImage("F:/logo.png", "F:/123.jpg", 0, 0);
}
}
I hope this article is helpful for you to use the Java language to realize image watermarking.