public class QRcodeTest {
public static void main(String[] args) throws Exception{
Qrcode qrcode = new Qrcode();
qrcode.setQrcodeErrorCorrect('M');//糾錯(cuò)等級(jí)（分為L(zhǎng)、M、H三個(gè)等級(jí)）
qrcode.setQrcodeEncodeMode('B');//N代表數(shù)字，A代表a-Z，B代表其它字符
qrcode.setQrcodeVersion(10);//版本
//生成二維碼中要存儲(chǔ)的信息
String qrData ="http://www.baidu.com";
//設(shè)置一下二維碼的像素
int width = 67+12*(10-1);
int height = 67+12*(10-1);
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
//繪圖
Graphics2D gs = bufferedImage.createGraphics();
gs.setBackground(Color.WHITE);
gs.setColor(Color.BLACK);
gs.clearRect(0, 0, width, height);//清除下畫板內(nèi)容
//設(shè)置下偏移量,如果不加偏移量，有時(shí)會(huì)導(dǎo)致出錯(cuò)。
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();
//設(shè)置要存儲(chǔ)的目錄（這里存儲(chǔ)在本地）
ImageIO.write(bufferedImage, "png", new File("E:/code/qrcodebd.png"));
}
}

public class MyQrCodeImage implements QRCodeImage {
BufferedImage bufferedImage;
public MyQrCodeImage(BufferedImage bufferedImage) {
this.bufferedImage = bufferedImage;
}
public int getHeight() {
return bufferedImage.getHeight();
}
public int getPixel(int arg0, int arg1) {
return bufferedImage.getRGB(arg0, arg1);
}
public int getWidth() {
return bufferedImage.getWidth();
}

}

public class ReadQrCode {
public static void main(String[] args) throws IOException {
File file = new File("E:/code/qrcodebd.png");
BufferedImage bufferedImage = ImageIO.read(file);
Qrcode qrcode = new Qrcode();
QRCodeDecoder codeDecoder = new QRCodeDecoder();
String result = new String(codeDecoder.decode(new MyQrCodeImage(bufferedImage)),"gb2312");
System.out.println(result);
}
}