jquery-qrcode 生成和读取二维码

首先要导入jar包(生成二维码的jar和读取二维码的jar)

生成二维码：

package com.imooc.qrcode;

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;

/**
 * QRCode 生成方法
 *
 *
 * @author Administrator
 *
 */
public class CreateQRCode {

    public static void main(String[] args) {
        Qrcode x = new Qrcode();
        x.setQrcodeEncodeMode('M');//纠错等级
        x.setQrcodeEncodeMode('B');
        x.setQrcodeVersion(7);//版本

        String qrData = "http://www.baidu.com";
        int width = 67 + 12 * (7-1);
        int height = 67 + 12 * (7-1);

        BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D gs = bufferedImage.createGraphics();

        gs.setBackground(Color.white);
        gs.setColor(Color.black);
        gs.clearRect(0, 0, width, height);

        int pixoff = 2;//偏移量

        byte[] d;
        try {
            d = qrData.getBytes("gb2312");
            if(d.length>0 && d.length<120){
                boolean[][] s = x.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/img1.png"));

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}

生成二维码如下:

读取二维码:

package com.imooc.qrcode;

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

import javax.imageio.ImageIO;

import jp.sourceforge.qrcode.QRCodeDecoder;

/**
 * QRCode 读取方法
 *
 * @author Administrator
 *
 */
public class ReadQRCode {

    public static void main(String[] args) throws Exception {
        File file = new File("E:/code/img1.png");

        BufferedImage image = ImageIO.read(file);

        QRCodeDecoder codeDecoder = new QRCodeDecoder();
        String s = new String(codeDecoder.decode(new MYQRCodeImage(image)),"gb2312");

        System.out.println(s);

    }

}

中间类:

package com.imooc.qrcode;

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();
    }

}

运行结果:

http://www.baidu.com