Using QRCode and zxing to generate two-dimensional code

First add the required jar to the project

Qrcode.jar, Zxingcore-2.2.jar,Javase-2.2.jar (also can not add, add a Matrixtoimagewriter class may also)

Package com.demo;import com.google.zxing.common.bitmatrix;import javax.imageio.imageio;import  java.io.File;import java.io.OutputStream;import java.io.IOException;import  java.awt.image.bufferedimage;/** * *  @ClassName:  matrixtoimagewriter * @ description:  If you do not want to add Javase-2.2.jar, add this class can *  @date  2015 April 30   morning 10:05:51*  @since     AR1.0 */public final class MatrixToImageWriter {  private  static final int black = 0xff000000;  private static final  Int white = 0xffffffff;  private matrixtoimagewriter ()  {}     public static bufferedimage tobufferedimage (Bitmatrix matrix)  {     int width = matrix.getwidth ();    int height =  Matrix.getheight ();      Bufferedimage image = new bufferedimage (Width, height, bufferedimage.type_int_ RGB);    for  (int x = 0; x < width; x++)  {       for  (int y = 0; y < height; y++ )  {        image.setrgb (X, y, matrix.get (x, y)  ? black : white);      }    }     return image;  }    public static void  WriteToFile (Bitmatrix matrix, string format, file file)        throws IOException {    BufferedImage image =  Tobufferedimage (Matrix);    if  (! Imageio.write (image, format, file))  {       Throw new ioexception ("could not write an image of format "  + format +  " to "  + file);     }  }     public static void writetostream (bitmatrix matrix, string  format, outputstream stream)       throws ioexception {     bufferedimage image = tobufferedimage (Matrix);     if  (! Imageio.write (Image, format, stream))  {      throw new  IOException ("could not write an image of format "  + format);     }  }}

test class

package com.demo;import java.awt.color;import java.awt.graphics2d;import  java.awt.image.bufferedimage;import java.io.file;import java.util.hashmap;import java.util.map; import javax.imageio.imageio;import com.google.zxing.barcodeformat;import  com.google.zxing.encodehinttype;import com.google.zxing.multiformatwriter;import  com.google.zxing.common.bitmatrix;import com.swetake.util.qrcode;public class qrcodedemo {  public static void main (String[] args)  {  qrcodedemo.encoderqrcode (" This is the QR code generated with QRCode ", " C:/users/liyy/desktop/testqrcode.png ");   qrcodedemo.zxingtest (" This is the QR code generated using zxing ", " C:/users/liyy/desktop/testzxing.png ");  } /**  *  * @ title: encoderqrcode  *  @Description:  using QRCode to generate QR codes   *  @param  @ param content  *  @param   @param  imgpath  *&nBSP; @return  void  return type   *  @throws   */ public static void  encoderqrcode (String content, string imgpath)  {  try {    qrcode qrcodehandler = new qrcode ();    Qrcodehandler.setqrcodeerrorcorrect (' M ');//  error correction    qrcodehandler.setqrcodeencodemode (' B ');    qrcodehandler.setqrcodeversion (7);   byte[] contentbytes =  Content.getbytes ("gb2312");    bufferedimage bufimg = new bufferedimage (140, &NBSP;140,&NBSP;BUFFEREDIMAGE.TYPE_INT_RGB);   graphics2d gs =  Bufimg.creategraphics ();    gs.setbackground (Color.White);    gs.clearrect (0,  0, 140, 140);   //  Set the image Color > black   gs.setcolor ( Color.Black);   //  set the offset &NBSP;&NBSP;&NBSP;INT&NBSP;PIXOFF&Nbsp;= 2;   //  output content >  QR code    if  (contentbytes.length  > 0)  &&  (contentbytes.length < 120)  {     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  {    system.err.println ("qrcode content bytes length = "  +  contentbytes.length +  " not in [ 0,120 ]. ");   }    Gs.dispose ();    bufimg.flush ();    file imgfile = new file ( Imgpath);   //  generate QR code qrcode picture    imageio.write (bufimg,  "PNG",  Imgfile);    system.out.println ("QRCode has output two-dimensional code! ");  } catch  (exception e)  {   e.printstacktrace ();   }  } /**  *  *  @Title: zxingtest  *  @Description:  Use Google's zxing to generate QR codes   *  @param   *  @return  void  return types   * @ throws  */  @SuppressWarnings ({  "rawtypes",  "Unchecked" &NBSP;})  public  Static void zxingtest (String content, string imgpath)  {  try {    multiformatwriter multiformatwriter = new mulTiformatwriter ();    map hints = new hashmap ();    hints.put ( encodehinttype.character_set,  "UTF-8");   bitmatrix bitmatrix =  Multiformatwriter.encode (content, barcodeformat.qr_code, 400, 400, hints);    file file1 = new file (Imgpath);    matrixtoimagewriter.writetofile ( bitmatrix,  "JPG",  file1);    system.out.println ("zxing has output two-dimensional code!");   } catch  (exception e)  {   e.printstacktrace ();   }  }}

Using QRCode and zxing to generate two-dimensional code