Add watermarks to images using Java

After checking the information, I found that it is very convenient to implement the watermark in java. The watermark can be an image or text, and can be rotated from different angles, you can write a code to process your images in batches.
 
Directory:
Image Watermark
Text watermark
[1]. image watermarks
 
Java code
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. Unzip codec;
Import com.sun.image.codec.jpeg. Unzip imagedecoder;
Import com.sun.image.codec.jpeg. encode imageencoder;
 
/**
* Image Watermark
* @ Blog http://sjsky.iteye.com
* @ Author Michael
*/
Public class ImageMarkLogoByIcon {
 
/**
* @ Param args
*/
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 a watermark to the image and rotate the watermark-45
ImageMarkLogoByIcon. markImageByIcon (iconPath, srcImgPath, targerPath2,
-45 );
 
}
 
/**
* Add a watermark to an image
* @ Param iconPath: watermark image path
* @ Param srcImgPath: source image path
* @ Param targerPath: Target Image path
*/
Public static void markImageByIcon (String iconPath, String srcImgPath,
String targerPath ){
MarkImageByIcon (iconPath, srcImgPath, targerPath, null );
}
 
/**
* Add a watermark to an image and set the Rotation Angle of the watermark image.
* @ Param iconPath: watermark image path
* @ Param srcImgPath: source image path
* @ Param targerPath: Target Image path
* @ Param degree watermark image rotation angle
*/
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 );
 
// Obtain the paint brush object
// Graphics g = buffImg. getGraphics ();
Graphics2D g = buffImg. createGraphics ();
 
// Set the processing of the jagged edge of a 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 );
}
 
// The path watermark of the watermark image is generally gif or png, so that transparency can be set.
ImageIcon imgIcon = new ImageIcon (iconPath );
 
// Obtain the Image object.
Image img = imgIcon. getImage ();
 
Float alpha = 0.5f; // transparency
G. setComposite (AlphaComposite. getInstance (AlphaComposite. SRC_ATOP,
Alpha ));
 
// Specifies 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 an image
ImageIO. write (buffImg, "JPG", OS );
 
System. out. println ("image complete adding Icon seal ...... ");
} Catch (Exception e ){
E. printStackTrace ();
} Finally {
Try {
If (null! = OS)
OS. close ();
} Catch (Exception e ){
E. printStackTrace ();
}
}
}
}
Original Image myblog_01.jpg:

 
Waterprint image blog_logo.png:

Watermarked:

 
Rotate the watermark icon:

 
 
[2] Text watermarks
Java code
Package michael. io. image;
 
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. InputStream;
Import java. io. OutputStream;
 
Import javax. imageio. ImageIO;
 
/**
* Text watermark
* @ Blog http://sjsky.iteye.com
* @ Author Michael
*/
Public class ImageMarkLogoByText {
 
/**
* @ Param args
*/
Public static void main (String [] args ){
String srcImgPath = "d:/test/michael/myblog_01.jpg ";
String logoText = "[test the http://sjsky.iteye.com of a text watermark]";
String targerPath = "d:/test/michael/img_mark_text.jpg ";
 
String targerPath2 = "d:/test/michael/img_mark_text_rotate.jpg ";
 
// Add a watermark to the image
ImageMarkLogoByText. markByText (logoText, srcImgPath, targerPath );
 
// Add a watermark to the image and rotate the watermark-45
ImageMarkLogoByText. markByText (logoText, srcImgPath, targerPath2,-45 );
}
 
/**
* Add a watermark to an image
* @ Param logoText
* @ Param srcImgPath
* @ Param targerPath
*/
Public static void markByText (String logoText, String srcImgPath,
String targerPath ){
MarkByText (logoText, srcImgPath, targerPath, null );
}
 
/**
* Add a watermark to an image and set the watermark Rotation Angle
* @ Param logoText
* @ Param srcImgPath
* @ Param targerPath
* @ Param degree
*/
Public static void markByText (String logoText, String srcImgPath,
String targerPath, Integer degree ){
// Path of the master Image
InputStream is = null;
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 );
 
// Obtain the paint brush object
// Graphics g = buffImg. getGraphics ();
Graphics2D g = buffImg. createGraphics ();
 
// Set the processing of the jagged edge of a 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 );
}
 
// Set the color
G. setColor (Color. red );
 
// Set Font
G. setFont (new Font ("", Font. BOLD, 30 ));
 
Float alpha = 0.5f;
G. setComposite (AlphaComposite. getInstance (AlphaComposite. SRC_ATOP,
Alpha ));
 
// Parameter 1-> set content, followed by two parameters-> Coordinate Position (x, y) of the text on the image ).
G. drawString (logoText 150,300 );
 
G. dispose ();
 
OS = new FileOutputStream (targerPath );
 
// Generate an image
ImageIO. write (buffImg, "JPG", OS );
 
System. out. println ("image after adding a text stamp ...... ");
} Catch (Exception e ){
E. printStackTrace ();
} Finally {
Try {
If (null! = Is)
Is. close ();
} Catch (Exception e ){
E. printStackTrace ();
}
Try {
If (null! = OS)
OS. close ();
} Catch (Exception e ){
E. printStackTrace ();
}
}
}
}
The text watermark is added as follows:

 
The text after rotation is as follows:

 

Reposted from: Michael blog