二维码QRCode开源实现

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。

编码测试：

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!");   
    }   
       
}  

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);   
    }   
       
}