QR code _ encode and decode

QR code encode and decode Tool

Import Java. AWT. color; import Java. AWT. graphics2d; import Java. AWT. image. bufferedimage; import Java. io. file; import Java. io. ioexception; import Java. io. inputstream; import Java. io. outputstream; import javax. imageIO. imageIO; import JP. sourceForge. qrcode. qrcodedecoder; import JP. sourceForge. qrcode. exception. decodingfailedexception; import COM. swetake. util. qrcode; public class twodimensioncode {/*** Generate a QR code (qrcode) image * @ Param content storage content * @ Param imgpath image path */Public void encoderqrcode (string content, string imgpath) {This. encoderqrcode (content, imgpath, "PNG", 7);}/*** generate a QR code (qrcode) image * @ Param content storage content * @ Param output stream */Public void encoderqrcode (string content, outputstream output) {This. encoderqrcode (content, output, "PNG", 7);}/*** generate a QR code (qrcode) image * @ Param content storage content * @ Param imgpath image path * @ Param imgtype image type */Public void encoderqrcode (string content, string imgpath, string imgtype) {This. encoderqrcode (content, imgpath, imgtype, 7);}/*** generate a QR code (qrcode) image * @ Param content storage content * @ Param output stream * @ Param imgtype image type */Public void encoderqrcode (string content, outputstream output, string imgtype) {This. encoderqrcode (content, output, imgtype, 7 );}/*** Generate a QR code image * @ Param content storage content * @ Param imgpath image path * @ Param imgtype image type * @ Param size QR code size */Public void encoderqrcode (string content, string imgpath, string imgtype, int size) {try {bufferedimage bufimg = This. qrcodecommon (content, imgtype, size); file imgfile = new file (imgpath); // generate a QR code qrcode image ImageIO. write (bufimg, imgtype, imgfile);} catch (exception e) {e. printstacktrace (); }/*** Generate a QR code (qrcode) image * @ Param content storage content * @ Param output stream * @ Param imgtype image type * @ Param size QR code size */Public void encoderqrcode (string content, outputstream output, string imgtype, int size) {try {bufferedimage bufimg = This. qrcodecommon (content, imgtype, size); // generates the QR code qrcode image ImageIO. write (bufimg, imgtype, output);} catch (exception e) {e. printstacktrace () ;}}/*** generates a QR code (qrcod E) Public Image Method * @ Param content storage content * @ Param imgtype image type * @ Param size QR code size * @ return */private bufferedimage qrcodecommon (string content, string imgtype, int size) {bufferedimage bufimg = NULL; try {qrcode qrcodehandler = new qrcode (); // set the error rate of the QR code. Optional values: L (7%), m (15%) q (25%), H (30%), the higher the error rate, the less information that can be stored, but the smaller the requirements for the definition of the QR code qrcodehandler. setqrcodeerrorcorrect ('M'); qrcodehandler. setqrcodeencodemode ('B'); // you can specify the QR code ruler. The value range is 1-40. The larger the value, the larger the size, the larger the information that can be stored. qrcodehandler. setqrcodeversion (size); // obtains the byte array of the content, and sets the encoding Format byte [] contentbytes = content. getbytes ("UTF-8"); // image size int imgsize = 67 + 12 * (size-1); bufimg = new bufferedimage (imgsize, imgsize, bufferedimage. type_int_rgb); graphics2d GS = bufimg. creategraphics (); // sets the background color Gs. setbackground (color. white); GS. clearrect (0, 0, imgsize, imgsize); // sets the image color> black Gs. setcolo R (color. black); // set the offset. If this parameter is not set, the parsing error int pixoff = 2 may occur. // The output content> QR code if (contentbytes. length> 0 & contentbytes. length <800) {Boolean [] [] codeout = qrcodehandler. calqrcode (contentbytes); For (INT I = 0; I <codeout. length; I ++) {for (Int J = 0; j <codeout. length; j ++) {If (codeout [J] [I]) {Gs. fillrect (J * 3 + pixoff, I * 3 + pixoff, 3, 3) ;}}} else {Throw new exception ("qrcode content byte S length = "+ contentbytes. length + "not in [0,800]. ");} Gs. dispose (); bufimg. flush ();} catch (exception e) {e. printstacktrace ();} return bufimg;}/*** parse the QR code (qrcode) * @ Param imgpath image path * @ return */Public String decoderqrcode (string imgpath) {// file imagefile = new file (imgpath); bufferedimage bufimg = NULL; string content = NULL; try {bufimg = ImageIO. read (imagefile ); Qrcodedecoder decoder = new qrcodedecoder (); content = new string (decoder. decode (New twodimensioncodeimage (bufimg), "UTF-8");} catch (ioexception e) {system. out. println ("error:" + E. getmessage (); E. printstacktrace ();} catch (decodingfailedexception DFE) {system. out. println ("error:" + DFE. getmessage (); DFE. printstacktrace ();} return content;}/*** parse the QR code (qrcode) * @ Param input stream *@ Return */Public String decoderqrcode (inputstream input) {bufferedimage bufimg = NULL; string content = NULL; try {bufimg = ImageIO. read (input); qrcodedecoder decoder = new qrcodedecoder (); content = new string (decoder. decode (New twodimensioncodeimage (bufimg), "UTF-8");} catch (ioexception e) {system. out. println ("error:" + E. getmessage (); E. printstacktrace ();} catch (decodingfailedexceptio N dfe) {system. out. println ("error:" + DFE. getmessage (); DFE. printstacktrace ();} return content;} public static void main (string [] ARGs) {string imgpath = "E:/abc.png"; string encodercontent = "http://blog.csdn.net/benjamin_whx "; twodimensioncode handler = new twodimensioncode (); handler. encoderqrcode (encodercontent, imgpath, "PNG"); // try {// outputstream output = new fileoutputstream (imgp ATH); // handler. encoderqrcode (content, output); //} catch (exception e) {// E. printstacktrace (); //} system. out. println ("======== encoder success"); string decodercontent = handler. decoderqrcode ("E:/aaa.jpg"); system. out. println ("Resolution Result:"); system. out. println (decodercontent); system. out. println ("========= decoder success !!! ");}}

Twodimensioncodeimage object class

import java.awt.image.BufferedImage;    import jp.sourceforge.qrcode.data.QRCodeImage;    public class TwoDimensionCodeImage implements QRCodeImage {        BufferedImage bufImg;            public TwoDimensionCodeImage(BufferedImage bufImg) {          this.bufImg = bufImg;      }            @Override      public int getHeight() {          return bufImg.getHeight();      }        @Override      public int getPixel(int x, int y) {          return bufImg.getRGB(x, y);      }        @Override      public int getWidth() {          return bufImg.getWidth();      }    }  

Jar package download http://download.csdn.net/detail/u012959829/7941481

QR code _ encode and decode