Java QR code generation tool Class

 Public classQrcodeutils {/*** Fault tolerance class L*/     Public Static Final Charcorrect_l = ' L '; /*** Fault tolerance class M*/     Public Static Final Charcorrect_m = ' M '; /*** Fault tolerance level Q*/     Public Static Final Charcorrect_q = ' Q '; /*** Fault tolerance class H*/     Public Static Final CharCorrect_h = ' H '; /*** Narration occupancy ratio*/     Public Static Final DoublePadding_ratio = 0.05; /*** Generate QR Code *@paramcontent to generate *@paramsize to generate *@paramversoin QR code size, the value range of 1-40, the larger the size of the larger, the more information can be stored *@paramECC Two-dimensional code error rate, selectable L (7%), M (15%), Q (25%), H (30%) *@return     * @throwsException*/     Public StaticBufferedImage Encode (String content,intSizeintVersionCharECC, BufferedImage logo)throwsexception{bufferedimage Image=NULL; QRCode QRCode=NewQRCode (); //set the two-dimensional code error rate, optional L (7%), M (15%), Q (25%), H (30%), the higher the error rate can be stored less information, but the two-dimensional code clarity requirements of the smallerQrcode.setqrcodeerrorcorrect (ECC); Qrcode.setqrcodeencodemode (B); //set the size of the two-dimensional code, the value range of 1-40, the larger the size of the larger, the more information can be storedqrcode.setqrcodeversion (version); //get a byte array of content, set the encoding format        byte[] contentbytes = Content.getbytes ("Utf-8"); DoubleRatio = 3;//three times times magnification by default        intQrcodesize = + 4 * (version-1); if(Size > 0) {ratio= (Double) Size/qrcodesize; }        intIntratio = (int) Math.ceil (ratio); //Narrator        intpadding = (int) Math.ceil (qrcodesize * intratio *padding_ratio); if(Padding < 10) {padding= 10; }         //Picture Size        intImageSize = qrcodesize * intratio + padding * 2; Image=Newbufferedimage (imageSize, ImageSize, Bufferedimage.type_int_rgb); Graphics2D GS=Image.creategraphics (); //Set Background colorGs.setbackground (Color.White); Gs.clearrect (0, 0, ImageSize, imageSize); //set Image Color BLACKGs.setcolor (Color.Black); //output content QR code        if(Contentbytes.length > 0 && contentbytes.length < 800) {              Boolean[] Codeout =Qrcode.calqrcode (contentbytes);  for(inti = 0; i < codeout.length; i++) {                   for(intj = 0; J < Codeout.length; J + +) {                      if(Codeout[j][i]) {Gs.fillrect (J* Intratio + padding, I * intratio +padding, intratio, intratio); }                  }              }          } Else {              Throw NewException ("qrcode content bytes Length =" + Contentbytes.length + "not in [0, 800]."); }                if(Logo! =NULL){            intLogosize = IMAGESIZE/4; intp = (imagesize-logosize)/2; Logo=Imageutils.setradius (logo); Gs.drawimage (Logo, p, p, logosize, Logosize,NULL);        } gs.dispose ();                Image.flush (); if(Intratio >ratio) {Image= Resize (Image, (int) Math.ceil (ratio * ImageSize/intratio)); }        returnimage; }        /*** Generate QR Code *@paramcontent *@paramSize *@paramversion *@paramECC *@return     * @throwsException*/     Public StaticBufferedImage Encode (String content,intSizeintVersionCharEccthrowsexception{returnEncode (content, size, version, ECC,NULL); }        /*** Generate QR Code *@paramcontent *@paramSize *@return     * @throwsException*/     Public StaticBufferedImage Encode (String content,intSizethrowsexception{returnEncode (content, size, 9, correct_q); }        /*** Generate QR Code *@paramcontent *@paramSize *@paramversion *@return     */     Public StaticBufferedImage Encode (String content,intSizeintVersionthrowsexception{returnencode (content, size, version, correct_q); }        /*** Generate QR Code *@paramcontent *@paramSize *@paramlogo *@return     */     Public StaticBufferedImage Encode (String content,intSize, BufferedImage logo)throwsexception{returnEncode (content, size, 9, correct_q, logo); }        /*** Generate QR Code *@paramcontent *@paramSize *@paramECC *@return     */     Public StaticBufferedImage Encode (String content,intSizeCharEccthrowsexception{returnEncode (content, size, 9, ECC); }        /*** Generate QR Code *@paramcontent *@return     */     Public StaticBufferedImage encode (String content)throwsexception{returnEncode (content, 0, 9, correct_q); }        /*** Parse QR code *@throwsunsupportedencodingexception *@throwsdecodingfailedexception*/     Public StaticString decode (BufferedImage bufferedimage)throwsdecodingfailedexception, unsupportedencodingexception{qrcodedecoder decoder=NewQrcodedecoder (); return NewString (Decoder.decode (NewMyqrcodeimage (BufferedImage)), "Utf-8"); }        /*** Image Zoom*/    Private StaticBufferedImage Resize (bufferedimage image,intsize) {BufferedImage BufferedImage=Newbufferedimage (size, size, BUFFEREDIMAGE.TYPE_INT_RGB); Graphics2D GS=Bufferedimage.creategraphics ();          Gs.setbackground (Color.White); Gs.clearrect (0, 0, size, size);        Gs.setcolor (Color.Black); Gs.fillrect (0, 0, size, size); Gs.drawimage (Image,0, 0, size, size,NULL);          Gs.dispose ();        Image.flush (); returnBufferedImage; }    }

Java QR code generation tool Class