Java implements encoding and decoding of QR code QRCode

Ext.: http://blog.csdn.net/ljb_blog/article/details/6700834

"One", Code:

Qrcodeencoderhandler.java

1  PackageMichael.qrcode;2 3 ImportJava.awt.Color;4 ImportJava.awt.Graphics2D;5 ImportJava.awt.image.BufferedImage;6 ImportJava.io.File;7 8 ImportJavax.imageio.ImageIO;9 Ten ImportCom.swetake.util.Qrcode; One  A /** - * QR code generator - * @bloghttp://sjsky.iteye.com the  * @authorMichael -  */ -  Public classQrcodeencoderhandler { -  +     /** - * Generate QR Code (qrcode) Pictures +      * @paramcontent A      * @paramImgpath at      */ -      Public voidEncoderqrcode (string content, String imgpath) { -         Try { -  -QRCode Qrcodehandler =NewQRCode (); -Qrcodehandler.setqrcodeerrorcorrect (' M '); inQrcodehandler.setqrcodeencodemode (' B '); -Qrcodehandler.setqrcodeversion (7); to  + System.out.println (content); -             byte[] contentbytes = Content.getbytes ("gb2312"); the  *BufferedImage bufimg =NewBufferedImage (140, 140, $ Bufferedimage.type_int_rgb);Panax Notoginseng  -Graphics2D GS =bufimg.creategraphics (); the  + Gs.setbackground (color.white); AGs.clearrect (0, 0, 140, 140); the  +             //set Image Color > BLACK - Gs.setcolor (color.black); $  $             //setting offset does not set may cause parsing errors -             intPixoff = 2; -             //output content > QR Code the             if(Contentbytes.length > 0 && contentbytes.length < 120) { -                 Boolean[] Codeout =Qrcodehandler.calqrcode (contentbytes);Wuyi                  for(inti = 0; i < codeout.length; i++) { the                      for(intj = 0; J < Codeout.length; J + +) { -                         if(Codeout[j][i]) { WuGs.fillrect (J * 3 + Pixoff, I * 3 + Pixoff, 3, 3); -                         } About                     } $                 } -}Else { -System.err.println ("qrcode content bytes Length =" -+ Contentbytes.length + "not in [0,120]."); A             } +  the gs.dispose (); - Bufimg.flush (); $  theFile Imgfile =NewFile (imgpath); the  the             //generate two-dimensional code QRCode pictures theImageio.write (bufimg, "PNG", imgfile); -  in}Catch(Exception e) { the e.printstacktrace (); the         } About  the     } the  the     /** +      * @paramargs the command line arguments -      */ the      Public Static voidMain (string[] args) {BayiString Imgpath = "D:/test/twocode/michael_qrcode.png"; the  theString content = "Hello big, small, welcome to qrcode!" -+ "\nmyblog [http://sjsky.iteye.com]" -+ "\nemail [[email protected]]" + "\ntwitter [@suncto]"; the  theQrcodeencoderhandler handler =NewQrcodeencoderhandler (); the Handler.encoderqrcode (content, Imgpath); the  -SYSTEM.OUT.PRINTLN ("Encoder qrcode Success"); the     } the}

"Two", decoding:
Qrcodedecoderhandler.java

Package Michael.qrcode;import Java.awt.image.bufferedimage;import Java.io.file;import java.io.IOException;import Javax.imageio.imageio;import Jp.sourceforge.qrcode.qrcodedecoder;import Jp.sourceforge.qrcode.data.QRCodeImage; Import jp.sourceforge.qrcode.exception.decodingfailedexception;/** * @blog http://sjsky.iteye.com * @author Michael * * public class Qrcodedecoderhandler {/** * decode QR code * @param imgpath * @return String */public string D        Ecoderqrcode (String Imgpath) {//qrcode QR code picture file ImageFile = new files (imgpath);        BufferedImage bufimg = null;        String decodeddata = null;            try {bufimg = Imageio.read (ImageFile);            Qrcodedecoder decoder = new Qrcodedecoder ();            Decodeddata = new String (Decoder.decode (New J2seimage (bufimg)));            try {//System.out.println (New String (Decodeddata.getbytes ("gb2312"),//"gb2312")); } catch (Exception e) {//// Todo:handle exception//}} catch (IOException e) {System.out.println ("Error:" + e.getme            Ssage ());        E.printstacktrace ();            } catch (Decodingfailedexception DfE) {System.out.println ("Error:" + dfe.getmessage ());        Dfe.printstacktrace ();    } return decodeddata; }/** * @param args the command line arguments */public static void main (string[] args) {Qrcodedeco        Derhandler handler = new Qrcodedecoderhandler ();        String Imgpath = "D:/test/twocode/michael_qrcode.png";        String decodercontent = Handler.decoderqrcode (Imgpath);        System.out.println ("Parse the result as follows:");        System.out.println (decodercontent);    System.out.println ("========decoder success!!!");        } class J2seimage implements Qrcodeimage {BufferedImage bufimg;        Public J2seimage (BufferedImage bufimg) {this.bufimg = bufimg; } public int getwidth () {return BufiMg.getwidth ();        } public int getheight () {return bufimg.getheight ();        } public int GetPixel (int x, int y) {return Bufimg.getrgb (x, y); }    }}

　　

Java implements encoding and decoding of QR code QRCode