Zxing generates QR code

Package com. zxing;
Import java. AWT. color;
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. filenotfoundexception;
Import java. Io. fileoutputstream;
Import java. Io. ioexception;
Import java. Io. outputstream;
Import java. util. hashtable;

Import javax. ImageIO. ImageIO;

Import com. Google. zxing. barcodeformat;
Import com. Google. zxing. encodehinttype;
Import com. Google. zxing. multiformatwriter;
Import com. Google. zxing. writerexception;
Import com. Google. zxing. Common. bitmatrix;
Import com. Google. zxing. qrcode. decoder. errorcorrectionlevel;


Public class qrcode {
// Average Image Width
Private Static final int image_width = 25;
Private Static final int image_height = 25;
Private Static final int image_half_width = image_width/2;
Private Static final int frame_width = 2;

// QR code
Private Static multiformatwriter mutiwriter = new multiformatwriter ();

/**
*
* @ Param content the text displayed by the QR code
* @ Param width the width of the QR code
* @ Param height the height of the QR code
* @ Param srcimagepath: Nested image in the middle
* @ Param destimagepath address generated by the QR code
*/
Public static void encode (string content, int width, int height,
String srcimagepath, outputstream ){
Try {
// ImageIO. Write parameter 1, bufferedimage 2, output format 3, output file
ImageIO. Write (genbarcode (content, width, height, srcimagepath), "jpg", outputstream );

} Catch (ioexception e ){
E. printstacktrace ();
} Catch (writerexception e ){
E. printstacktrace ();
}
}

/**
* Get bufferedimage
*
* @ Param content the text displayed by the QR code
* @ Param width the width of the QR code
* @ Param height the height of the QR code
* @ Param srcimagepath: Nested image in the middle
* @ Return
* @ Throws writerexception
* @ Throws ioexception
*/
Private Static bufferedimage genbarcode (string content, int width, int height, string srcimagepath)
Throws writerexception, ioexception {
// Read the source Image
Bufferedimage scaleimage = Scale (srcimagepath, image_width,
Image_height, false );

Int [] [] srcpixels = new int [image_width] [image_height];
For (INT I = 0; I <scaleimage. getwidth (); I ++ ){
For (Int J = 0; j <scaleimage. getheight (); j ++ ){
Srcpixels [I] [J] = scaleimage. getrgb (I, j );
}
}

Hashtable hint = new hashtable ();
Hint. Put (encodehinttype. character_set, "UTF-8 ");
Hint. Put (encodehinttype. error_correction, errorcorrectionlevel. H );
// Generate a QR code
Bitmatrix matrix = mutiwriter. encode (content, barcodeformat. qr_code,
Width, height, hint );

// Convert the two-dimensional matrix into a one-dimensional pixel array
Int halfw = matrix. getwidth ()/2;
Int halfh = matrix. getheight ()/2;
Int [] pixels = new int [width * Height];

// System. Out. println (matrix. getheight ());
For (INT y = 0; y <matrix. getheight (); y ++ ){
For (INT x = 0; x <matrix. getwidth (); X ++ ){
// Read the image
If (x> halfw-image_half_width
& X & Y> halfh-image_half_width
& Y Pixels [y * width + x] = srcpixels [X-halfw
+ Image_half_width] [Y-halfh + image_half_width];
}
// Create a border around the image
Else if (x> halfw-image_half_width-frame_width
& X & Y> halfh-image_half_width-frame_width & Y + Image_half_width + frame_width)
| (X> halfw + image_half_width-frame_width
& X & Y> halfh-image_half_width-frame_width & Y + Image_half_width + frame_width)
| (X> halfw-image_half_width-frame_width
& X & Y> halfh-image_half_width-frame_width & Y -Image_half_width + frame_width)
| (X> halfw-image_half_width-frame_width
& X & Y> halfh + image_half_width-frame_width & Y + Image_half_width + frame_width )){
Pixels [y * width + x] = 0 xfffffff;
} Else {
// The Color of the QR code can be modified here, and the color of the QR code and background can be determined separately;
Pixels [y * width + x] = matrix. Get (x, y )? 0xff000000
: 0 xfffffff;
}
}
}

Bufferedimage image = new bufferedimage (width, height,
Bufferedimage. type_int_rgb );
Image. getraster (). setdataelements (0, 0, width, height, pixels );

Return image;
}

/**
* Scale the input original image by height and width to generate the required icons.
*
* @ Param srcimagefile
* Source file address
* @ Param height
* Target Height
* @ Param width
* Target width
* @ Param hasfiller
* If the proportion is incorrect, do you need to fill the White List? True indicates the White List; false indicates that the White List is not filled;
* @ Throws ioexception
*/
Private Static bufferedimage Scale (string srcimagefile, int height,
Int width, Boolean hasfiller) throws ioexception {
Double ratio = 0.0; // scaling ratio
File file = new file (srcimagefile );
Bufferedimage srcimage = ImageIO. Read (File );
Image destimage = srcimage. getscaledinstance (width, height,
Bufferedimage. scale_smooth );
// Calculate the proportion
If (srcimage. getheight ()> height) | (srcimage. getwidth ()> width )){
If (srcimage. getheight ()> srcimage. getwidth ()){
Ratio = (New INTEGER (height). doublevalue ()
/Srcimage. getheight ();
} Else {
Ratio = (New INTEGER (width). doublevalue ()
/Srcimage. getwidth ();
}
Affinetransformop op = new affinetransformop (affinetransform
. Getscaleinstance (ratio, ratio), null );
Destimage = op. Filter (srcimage, null );
}
If (hasfiller) {// whitelist
Bufferedimage image = new bufferedimage (width, height,
Bufferedimage. type_int_rgb );
Graphics2d graphic = image. creategraphics ();
Graphic. setcolor (color. White );
Graphic. fillrect (0, 0, width, height );
If (width = destimage. getwidth (null ))
Graphic. drawimage (destimage, 0, (height-destimage
. Getheight (null)/2, destimage. getwidth (null ),
Destimage. getheight (null), color. White, null );
Else
Graphic. drawimage (destimage,
(Width-destimage. getwidth (null)/2, 0, destimage
. Getwidth (null), destimage. getheight (null ),
Color. White, null );
Graphic. Dispose ();
Destimage = image;
}
Return (bufferedimage) destimage;
}

Public static void main (string [] ARGs ){
File file = new file ("D: // androidqr.jpg ");

Outputstream out = NULL;
Try {
Out = new fileoutputstream (File );
} Catch (filenotfoundexception e ){
E. printstacktrace ();
}

Qrcode. encode ("xx.apk ",
350,350, "d:/android.jpg", out );
}
}