Create and parse a QR code with a logo

Decoderqrcode is used to parse the QR code with a logo. If an error is reported and the Code cannot be parsed, the system queries the information and finds a more powerful QR code.

Tool: goolezxing

 

First, download the jar package of goolezxing.

---------------------------------------- Generate a QR code ------------------------------------------------

Public class goolezxingqrcodeutil {

Private Static final string charset = "UTF-8 ";
Private Static final string format_name = "jpg ";
// QR code size
Private Static final int qrcode_size = 300;
// Logo width
Private Static final int width = 60;
// Logo height
Private Static final int Height = 60;

Private Static bufferedimage createimage (string content, string imgpath,
Boolean needcompress) throws exception {
Hashtable <encodehinttype, Object> hints = new hashtable <encodehinttype, Object> ();
Hints. Put (encodehinttype. error_correction, errorcorrectionlevel. H );
Hints. Put (encodehinttype. character_set, charset );
// Hints. Put (encodehinttype. margin, 1 );
Bitmatrix = new multiformatwriter (). encode (content,
Barcodeformat. qr_code, qrcode_size, qrcode_size, hints );
Int width = bitmatrix. getwidth ();
Int Height = bitmatrix. getheight ();
Bufferedimage image = new bufferedimage (width, height,
Bufferedimage. type_int_rgb );
For (INT x = 0; x <width; X ++ ){
For (INT y = 0; y Image. setrgb (X, Y, bitmatrix. Get (x, y )? 0xff000000
: 0 xffffffff );
}
}
If (imgpath = NULL | "". Equals (imgpath )){
Return image;
}
// Insert an image
Goolezxingqrcodeutil. insertimage (image, imgpath, needcompress );
Return image;
}

/**
* Insert a logo
*
* @ Param Source
* QR code Image
* @ Param imgpath
* Logo image address
* @ Param needcompress
* Compression or not
* @ Throws exception
*/
Private Static void insertimage (bufferedimage source, string imgpath,
Boolean needcompress) throws exception {
File file = new file (imgpath );
If (! File. exists ()){
System. Err. println ("" + imgpath + "this file does not exist! ");
Return;
}
Image src = ImageIO. Read (new file (imgpath ));
Int width = SRC. getwidth (null );
Int Height = SRC. getheight (null );
If (needcompress) {// compress logo
If (width> width ){
Width = width;
}
If (height> height ){
Height = height;
}
Image image = SRC. getscaledinstance (width, height,
Image. scale_smooth );
Bufferedimage tag = new bufferedimage (width, height,
Bufferedimage. type_int_rgb );
Graphics G = tag. getgraphics ();
G. drawimage (image, 0, 0, null); // draw the reduced graph.
G. Dispose ();
Src = image;
}
// Insert the logo
Graphics2d graph = source. creategraphics ();
Int x = (qrcode_size-width)/2;
Int y = (qrcode_size-height)/2;
Graph. drawimage (SRC, X, Y, width, height, null );
Shape shape = new roundrectangle2d. Float (X, Y, width, width, 6, 6 );
Graph. setstroke (New basicstroke (3f ));
Graph. Draw (SHAPE );
Graph. Dispose ();
}

/**
* Generate a QR code (embedded logo)
*
* @ Param content
* Content
* @ Param imgpath
* Logo address
* @ Param destpath
* Storage directory
* @ Param needcompress
* Whether to compress the logo
* @ Throws exception
*/
Public static void encode (string content, string imgpath, string destpath,
Boolean needcompress) throws exception {
Bufferedimage image = goolezxingqrcodeutil. createimage (content, imgpath,
Needcompress );
Mkdirs (destpath );
String file = new random (). nextint (99999999) + ". jpg ";
ImageIO. Write (image, format_name, new file (destpath + "/" + file ));
}

/**
* When the folder does not exist, mkdirs automatically creates a multi-level Directory, which is different from mkdir. (mkdir throws an exception if the parent directory does not exist)
* @ Author lanyuan
* Email: [email protected]
* @ Date 2013-12-11 10:16:36 AM
* @ Param destpath: storage directory
*/
Public static void mkdirs (string destpath ){
File file = new file (destpath );
// When the folder does not exist, mkdirs automatically creates a multi-level Directory, which is different from mkdir. (mkdir throws an exception if the parent directory does not exist)
If (! File. exists ()&&! File. isdirectory ()){
File. mkdirs ();
}
}

/**
* Generate a QR code (embedded logo)
*
* @ Param content
* Content
* @ Param imgpath
* Logo address
* @ Param destpath
* Storage address
* @ Throws exception
*/
Public static void encode (string content, string imgpath, string destpath)
Throws exception {
Goolezxingqrcodeutil. encode (content, imgpath, destpath, false );
}

/**
* Generate a QR code
*
* @ Param content
* Content
* @ Param destpath
* Storage address
* @ Param needcompress
* Whether to compress the logo
* @ Throws exception
*/
Public static void encode (string content, string destpath,
Boolean needcompress) throws exception {
Goolezxingqrcodeutil. encode (content, null, destpath, needcompress );
}

/**
* Generate a QR code
*
* @ Param content
* Content
* @ Param destpath
* Storage address
* @ Throws exception
*/
Public static void encode (string content, string destpath) throws exception {
Goolezxingqrcodeutil. encode (content, null, destpath, false );
}

/**
* Generate a QR code (embedded logo)
*
* @ Param content
* Content
* @ Param imgpath
* Logo address
* @ Param output
* Output stream
* @ Param needcompress
* Whether to compress the logo
* @ Throws exception
*/
Public static void encode (string content, string imgpath,
Outputstream output, Boolean needcompress) throws exception {
Bufferedimage image = goolezxingqrcodeutil. createimage (content, imgpath,
Needcompress );
ImageIO. Write (image, format_name, output );
}

/**
* Generate a QR code
*
* @ Param content
* Content
* @ Param output
* Output stream
* @ Throws exception
*/
Public static void encode (string content, outputstream output)
Throws exception {
Goolezxingqrcodeutil. encode (content, null, output, false );
}

/**
* Parse the QR code
*
* @ Param File
* QR code Image
* @ Return
* @ Throws exception
*/
Public static string decode (File file) throws exception {
Bufferedimage image;
Image = ImageIO. Read (File );
If (image = NULL ){
Return NULL;
}
Bufferedimageluminancesource source = new bufferedimageluminancesource (
Image );
Binarybitmap bitmap = new binarybitmap (New hybridbinarizer (source ));
Result result;
Hashtable <decodehinttype, Object> hints = new hashtable <decodehinttype, Object> ();
Hints. Put (decodehinttype. character_set, charset );
Result = new multiformatreader (). Decode (bitmap, hints );
String resultstr = result. gettext ();
Return resultstr;
}

/**
* Parse the QR code
*
* @ Param path
* QR code image address
* @ Return
* @ Throws exception
*/
Public static string decode (string path) throws exception {
Return goolezxingqrcodeutil. Decode (new file (PATH ));
}

Public static void main (string [] ARGs) throws exception {
// String text = "I'm a Shiny boy !! ";
// Goolezxingqrcodeutil. encode (text, "F:/test/twocode/123.jpg"," F:/test/twocode/", true );


String imgpath = "F:/test/twocode/girl.png ";
String rs = goolezxingqrcodeutil. Decode (imgpath );
System. Out. println ("Resolution result =" + "\ n" + RS );

}
}

 

 

 

--------------------------------------- Parse the QR code (with logo images )-------------------------------------

Public class bufferedimageluminancesource extends luminancesource {
Private Final bufferedimage image;
Private Final int left;
Private Final int top;

Public bufferedimageluminancesource (bufferedimage image ){
This (image, 0, 0, image. getwidth (), image. getheight ());
}

Public bufferedimageluminancesource (bufferedimage image, int left,
Int top, int width, int height ){
Super (width, height );

Int sourcewidth = image. getwidth ();
Int sourceheight = image. getheight ();
If (left + width> sourcewidth | top + height> sourceheight ){
Throw new illegalargumentexception (
"Crop rectangle does not fit within image data .");
}

For (INT y = top; y <top + height; y ++ ){
For (INT x = left; x <left + width; X ++ ){
If (image. getrgb (x, y) & 0xff000000) = 0 ){
Image. setrgb (X, Y, 0 xffffff); // = white
}
}
}

This. Image = new bufferedimage (sourcewidth, sourceheight,
Bufferedimage. type_byte_gray );
This. image. getgraphics (). drawimage (image, 0, 0, null );
This. Left = left;
This. Top = top;
}


Public byte [] getrow (INT y, byte [] row ){
If (Y <0 | Y> = getheight ()){
Throw new illegalargumentexception (
"Requested row is outside the image:" + y );
}
Int width = getwidth ();
If (ROW = NULL | row. Length <width ){
Row = new byte [width];
}
Image. getraster (). getdataelements (left, top + Y, width, 1, row );
Return row;
}


Public byte [] getmatrix (){
Int width = getwidth ();
Int Height = getheight ();
Int area = width * height;
Byte [] matrix = new byte [area];
Image. getraster (). getdataelements (left, top, width, height, matrix );
Return matrix;
}


Public Boolean iscropsupported (){
Return true;
}


Public luminancesource crop (INT left, int top, int width, int height ){
Return new bufferedimageluminancesource (image, this. Left + left,
This. Top + top, width, height );
}


Public Boolean isrotatesupported (){
Return true;
}


Public luminancesource rotatecounterclockwise (){
Int sourcewidth = image. getwidth ();
Int sourceheight = image. getheight ();
Affinetransform transform = new affinetransform (0.0,-1.0, 1.0,
0.0, 0.0, sourcewidth );
Bufferedimage rotatedimage = new bufferedimage (sourceheight,
Sourcewidth, bufferedimage. type_byte_gray );
Graphics2d G = rotatedimage. creategraphics ();
G. drawimage (image, transform, null );
G. Dispose ();
Int width = getwidth ();
Return new bufferedimageluminancesource (rotatedimage, top,
Sourcewidth-(left + width), getheight (), width );
}
}

 

 

So far, the demonstration has been completed by using zxing to generate and parse the QR code, mainly for self-preparation, and at the same time convenient for people in need. Haha!

Create and parse a QR code with a logo