二维码QRCode开源兑现

二维码QRCode开源实现

二维码QRCode开源实现

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转载自 http://thingkau.iteye.com/blog/598913

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日本人写的解码与编码实现Sourceforge.jp与swetake.com

这里把它们merge到一个jar文件里。（见附件中的压缩包zip文件）

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编码测试：

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import java.awt.Color;  import java.awt.Graphics2D;  import java.awt.image.BufferedImage;  import java.io.File;    import javax.imageio.ImageIO;    import com.swetake.util.Qrcode;    public class QRCodeEncoderTest {      public static void main(String[] args) throws Exception {          Qrcode qrcode=new Qrcode();          qrcode.setQrcodeErrorCorrect('M');          qrcode.setQrcodeEncodeMode('B');          qrcode.setQrcodeVersion(7);            String testString = "_-+^%$#@!~`=&)*(";                    byte[] d =testString.getBytes("GBK");                              BufferedImage bi = new BufferedImage(139, 139, BufferedImage.TYPE_INT_RGB);                    // createGraphics          Graphics2D g = bi.createGraphics();                    // set background          g.setBackground(Color.WHITE);          g.clearRect(0, 0, 139, 139);                    g.setColor(Color.BLACK);                              if (d.length>0 && d.length <123){              boolean[][] b = qrcode.calQrcode(d);                            for (int i=0;i<b.length;i++){                                    for (int j=0;j<b.length;j++){                      if (b[j][i]) {                          g.fillRect(j*3+2,i*3+2,3,3);                      }                  }                            }          }                    g.dispose();          bi.flush();            String FilePath="TestQRCode.png";          File f = new File(FilePath);                    ImageIO.write(bi, "png", f);          System.out.println("doned!");      }        } 

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解码测试：

import java.awt.image.BufferedImage;  import java.io.File;  import java.io.IOException;  import java.io.UnsupportedEncodingException;    import javax.imageio.ImageIO;    import jp.sourceforge.qrcode.QRCodeDecoder;  import jp.sourceforge.qrcode.data.QRCodeImage;  import jp.sourceforge.qrcode.exception.DecodingFailedException;  public class QRCodeDecoderTest {            public QRCodeDecoderTest() {      }            public static void main(String[] args) {                    QRCodeDecoder decoder = new QRCodeDecoder();                    File imageFile = new File("TestQRCode.png");                    BufferedImage image = null;                    try {              image = ImageIO.read(imageFile);          } catch (IOException e) {              System.out.println("Error: "+ e.getMessage());          }          try {                            String decodedData = new String(decoder.decode(new J2SEImage(image)),"GBK");                            System.out.println(decodedData);          } catch (DecodingFailedException dfe) {              System.out.println("Error: " + dfe.getMessage());          } catch (UnsupportedEncodingException e) {              e.printStackTrace();          }                          }  }     class J2SEImage implements QRCodeImage {      BufferedImage image;            public J2SEImage(BufferedImage image) {          this.image = image;      }            public int getWidth() {          return image.getWidth();      }            public int getHeight() {          return image.getHeight();      }            public int getPixel(int x, int y) {          return image.getRGB(x, y);      }        } 

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