Java Image Watermark

Package com. HMW. picmark;
 
Import java. AWT. alphacomposite;
Import java. AWT. color;
Import java. AWT. Font;
Import java. AWT. graphics2d;
Import java. AWT. image;
Import java. AWT. Geom. affinetransform;
Import java. AWT. image. affinetransformop;
Import java. AWT. image. bufferedimage;
Import java. Io. file;
Import java. Io. ioexception;
 
Import javax. ImageIO. ImageIO;
 
/**
* Image tools, image watermarks, text watermarks, scaling, and whitelist
* @ Author Carl he
*/
Public final class imageutils {
/** Image format: JPG */
Private Static final string pictrue_formate_jpg = "jpg ";

Private imageutils (){}
/**
* Add an image watermark
* @ Param targetimg target image path, for example, C: // mypictrue // 1.jpg
* @ Param waterimg watermark image path, for example, C: // mypictrue // logo.png
* @ Param x the offset between the watermark image and the left side of the target image. If X is less than 0, it is in the middle.
* @ Param y the offset between the watermark image and the target image. If y is less than 0, it is in the middle.
* @ Param Alpha transparency (0.0 -- 1.0, 0.0 is completely transparent, and 1.0 is completely opaque)
*/
Public final static void pressimage (string targetimg, string waterimg, int X, int y, float alpha ){
Try {
File file = new file (targetimg );
Image image = ImageIO. Read (File );
Int width = image. getwidth (null );
Int Height = image. getheight (null );
Bufferedimage = new bufferedimage (width, height, bufferedimage. type_int_rgb );
Graphics2d G = bufferedimage. creategraphics ();
G. drawimage (image, 0, 0, width, height, null );

Image waterimage = ImageIO. Read (new file (waterimg); // watermark File
Int width_1 = waterimage. getwidth (null );
Int height_1 = waterimage. getheight (null );
G. setcomposite (alphacomposite. getinstance (alphacomposite. src_atop, alpha ));

Int widthdiff = width-width_1;
Int heightdiff = height-height_1;
If (x <0 ){
X = widthdiff/2;
} Else if (x> widthdiff ){
X = widthdiff;
}
If (Y <0 ){
Y = heightdiff/2;
} Else if (Y> heightdiff ){
Y = heightdiff;
}
G. drawimage (waterimage, X, Y, width_1, height_1, null); // watermark end
G. Dispose ();
ImageIO. Write (bufferedimage, pictrue_formate_jpg, file );
} Catch (ioexception e ){
E. printstacktrace ();
}
}
 
/**
* Add a text watermark
* @ Param targetimg target image path, for example, C: // mypictrue // 1.jpg
* @ Param presstext watermark text, such as: China Securities Network
* @ Param fontname: font name, for example,
* @ Param fontstyle font style, such as bold and italic (font. Bold | font. italic)
* @ Param fontsize font size, in pixels
* @ Param color font color
* @ Param x the offset between the watermark text and the left side of the target image. If X is less than 0, it is in the middle.
* @ Param y the offset between the watermark text and the target image. If y is less than 0, it is in the middle.
* @ Param Alpha transparency (0.0 -- 1.0, 0.0 is completely transparent, and 1.0 is completely opaque)
*/
Public static void presstext (string targetimg, string presstext, string fontname, int fontstyle, int fontsize, color, int X, int y, float alpha ){
Try {
File file = new file (targetimg );

Image image = ImageIO. Read (File );
Int width = image. getwidth (null );
Int Height = image. getheight (null );
Bufferedimage = new bufferedimage (width, height, bufferedimage. type_int_rgb );
Graphics2d G = bufferedimage. creategraphics ();
G. drawimage (image, 0, 0, width, height, null );
G. setfont (new font (fontname, fontstyle, fontsize ));
G. setcolor (color );
G. setcomposite (alphacomposite. getinstance (alphacomposite. src_atop, alpha ));

Int width_1 = fontsize * getlength (presstext );
Int height_1 = fontsize;
Int widthdiff = width-width_1;
Int heightdiff = height-height_1;
If (x <0 ){
X = widthdiff/2;
} Else if (x> widthdiff ){
X = widthdiff;
}
If (Y <0 ){
Y = heightdiff/2;
} Else if (Y> heightdiff ){
Y = heightdiff;
}

G. drawstring (presstext, X, Y + height_1 );
G. Dispose ();
ImageIO. Write (bufferedimage, pictrue_formate_jpg, file );
} Catch (exception e ){
E. printstacktrace ();
}
}

/**
* Get the length of a character. One Chinese character serves as one character, and one English letter serves as 0.5 characters.
* @ Param text
* @ Return: returns 2; text = "test"; returns 2; text = "ABC"; returns 4.
*/
Public static int getlength (string text ){
Int textlength = text. Length ();
Int length = textlength;
For (INT I = 0; I <textlength; I ++ ){
If (string. valueof (text. charat (I). getbytes (). length> 1 ){
Length ++;
}
}
Return (length % 2 = 0 )? Length/2: length/2 + 1;
}
 
/**
* Image Scaling
* @ Param filepath: Image path
* @ Param height
* @ Param width: width
* @ Param BB: whether to fill in the white when the proportion is incorrect
*/
Public static void resize (string filepath, int height, int width, Boolean bb ){
Try {
Double ratio = 0; // scaling ratio
File F = new file (filepath );
Bufferedimage Bi = ImageIO. Read (f );
Image itemp = Bi. getscaledinstance (width, height, bufferedimage. scale_smooth );

// Calculate the proportion
If (Bi. getheight ()> height) | (Bi. getwidth ()> width )){
If (Bi. getheight ()> bi. getwidth ()){
Ratio = (New INTEGER (height). doublevalue ()/Bi. getheight ();

} Else {
Ratio = (New INTEGER (width). doublevalue ()/Bi. getwidth ();

}
Affinetransformop op = new affinetransformop (affinetransform. getscaleinstance (ratio, ratio), null );

Itemp = op. Filter (Bi, null );
}
If (bb ){
Bufferedimage image = new bufferedimage (width, height, bufferedimage. type_int_rgb );

Graphics2d G = image. creategraphics ();
G. setcolor (color. White );
G. fillrect (0, 0, width, height );
If (width = itemp. getwidth (null ))
G. drawimage (itemp, 0, (height-itemp. getheight (null)/2, itemp. getwidth (null), itemp. getheight (null), color. white, null );

Else
G. drawimage (itemp, (width-itemp. getwidth (null)/2, 0, itemp. getwidth (null), itemp. getheight (null), color. white, null );

G. Dispose ();
Itemp = image;
}
ImageIO. Write (bufferedimage) itemp, "jpg", F );
} Catch (ioexception e ){
E. printstacktrace ();
}
}
 
Public static void main (string [] ARGs) throws ioexception {
Pressimage ("C: // PIC // jpg", "C: // PIC // test.gif", 5000,500 0, 0f );
Presstext ("C: // PIC // jpg", "Wang Zi printing", "", Font. bold | font. italic, 20, color. black, 0, 0, 8f );
Resize ("C: // PIC // 4.jpg", 1000,500, true );
}
}