java Qrcode生成二维码与解析

代码和jar包链接: https://pan.baidu.com/s/1pLyonvt 密码: edvu

package code;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Date;

import javax.imageio.ImageIO;

import com.swetake.util.Qrcode;

public class CreateQrCode {
    public static void main(String[] args) throws Exception {
        Qrcode qrcode = new Qrcode();  
           qrcode.setQrcodeErrorCorrect('M');//纠错等级（分为L、M、H三个等级）  
           qrcode.setQrcodeEncodeMode('B');//N代表数字，A代表a-Z，B代表其它字符  
           qrcode.setQrcodeVersion(7);//版本  
           //生成二维码中要存储的信息  
           String qrData = "1330300155";  
           //设置一下二维码的像素  
           int width = 67+12*(7-1);  
           int height = 67+12*(7-1);  
           BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);  
           //绘图  
           Graphics2D gs = bufferedImage.createGraphics();  
           gs.setBackground(Color.WHITE);  
           gs.setColor(Color.BLACK);  
           gs.clearRect(0, 0, width, height);//清除下画板内容  

           //设置下偏移量,如果不加偏移量，有时会导致出错。  
           int pixoff = 2;  

           byte[] d = qrData.getBytes("gb2312");  
           if(d.length > 0 && d.length <120){  
               boolean[][] s = qrcode.calQrcode(d);  
               for(int i=0;i<s.length;i++){  
                   for(int j=0;j<s.length;j++){  
                       if(s[j][i]){  
                           gs.fillRect(j*3+pixoff, i*3+pixoff, 3, 3);  
                       }  
                   }  
               }  
           }  
           gs.dispose();  
           bufferedImage.flush();  
           ImageIO.write(bufferedImage, "png", new File("E:/code/"+System.currentTimeMillis()+".png")); 
    }
}




/*-----------------解析----------------------*/
package code;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import jp.sourceforge.qrcode.QRCodeDecoder;

public class ReadQRCode {
    public static void main(String[] args) throws IOException{  
        File file = new File("E:/code/qrcode.png");  
        BufferedImage bufferedImage = ImageIO.read(file);  
        QRCodeDecoder codeDecoder = new QRCodeDecoder();  
        /*其中codeDecoder.decode()中参数需要传入一个实现BufferedImage接口的类
         * ，我们新建MyQRCodeImage.java类，该类实现了QRCodeImage接口*/
        String result = new String(codeDecoder.decode(new MyQRCodeImage(bufferedImage)),"gb2312");  
        System.out.println(result);  
    }  
}

/*-----------------------创建MyQRcodeImage类实现QRCodeImage-------------------*/
package code;

import java.awt.image.BufferedImage;

import jp.sourceforge.qrcode.data.QRCodeImage;

public class MyQRCodeImage implements QRCodeImage {

    BufferedImage bufferedImage;

    public MyQRCodeImage(BufferedImage bufferedImage) {
        this.bufferedImage = bufferedImage;
    }

    @Override
    public int getHeight() {
        return bufferedImage.getHeight();
    }

    @Override
    public int getPixel(int arg0, int arg1) {
        return bufferedImage.getRGB(arg0, arg1);
    }

    @Override
    public int getWidth() {
        return bufferedImage.getWidth();
    }
}