java实现二维码-实现方式3

 java实现二维码-实现方式3

1.引入相关jar包Qrcode_A.jar和Qrcode_B.jar.jar

2.相关的代码如下:

创建二维码代码

package com.imooc.qrcode;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.imageio.ImageIO;
import com.swetake.util.Qrcode;

public class CreateQRCode {
public static void main(String[] args) throws IOException {
Qrcode x = new Qrcode();
x.setQrcodeErrorCorrect('M');//纠错等级
x.setQrcodeEncodeMode('B');//N(数字)  A(a-Z)  B(代表其它字符)
x.setQrcodeVersion(7);//版本

String qrData = "www.imooc.com";//内容

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;//定义偏移量

byte[] 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:MyNewWorkSpace\\code\\qrcode.png"));
}
}

解析二维码代码

package com.imooc.qrcode;
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 {
//指定文件路径
File file = new File("E:MyNewWorkSpace\\code\\qrcode.png");
BufferedImage bufferedImage = ImageIO.read(file);
QRCodeDecoder qrCodeDecoder = new QRCodeDecoder();
String result = new String(qrCodeDecoder.decode(new MyQRCodeImage(bufferedImage)),"gb2312");
System.out.println(result);
}
}

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();
}
}

相关资源下载地址：https://pan.baidu.com/s/1slruk1Z