二维码生成与扫描

/*需要导入以下jar包
*QRCode.jar、Qrcodeen.jar
*/ 
//生成二维码
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 QRCodeEncoderTest() throws Exception{
		Qrcode qrcode = new Qrcode();
		qrcode.setQrcodeErrorCorrect('M');
		qrcode.setQrcodeEncodeMode('B');
		qrcode.setQrcodeVersion(7);
		String encodeddata = "{id:10022,name:wandern}";
		byte[] d = encodeddata.getBytes("utf-8");
		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 = "F:\\QRCode.png";
		File f = new File(FilePath);
		ImageIO.write(bi, "png", f);
		System.out.println("Input Encoded data is："+encodeddata);
	}
	//测试
	public static void main(String[] args) throws Exception {
		QRCodeEncoderTest qRCodeEncoderTest=new QRCodeEncoderTest();
	}
}
//二维码扫描
 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() {
		QRCodeDecoder decoder = new QRCodeDecoder();
		File imageFile = new File("F:\\QRCode.png");  //生成的二位码图片
		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)), "utf-8");
			System.out.println("Output Decoded Data is："+decodedData);
		} catch (DecodingFailedException dfe) {
			System.out.println("Error: " + dfe.getMessage());
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
	}
        //测试 
	public static void main(String[] args) {
		QRCodeDecoderTest cRCodeDecoderTest=new QRCodeDecoderTest();
	}
}
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);
	}
}