Java二维码的生成以及解析
发布时间：2010/8/3 11:19:01 来源：城市学习网 编辑：ziteng
日本人写的解码与编码实现Sourceforge.jp与swetake.com
这里把它们merge到一个jar文件里。
编码测试：
Java代码
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 static void main(String[] args) throws Exception {
Qrcode qrcode=new Qrcode();
qrcode.setQrcodeErrorCorrect('M');
qrcode.setQrcodeEncodeMode('B');
qrcode.setQrcodeVersion(7);
String testString = "_-+^%$#@!~`=&)*(";
byte[] d =testString.getBytes("GBK");
BufferedImage bi = new BufferedImage(139, 139, BufferedImage.TYPE_INT_RGB);
// createGraphics
Graphics2D g = bi.createGraphics();
// set background
g.setBackground(Color.WHITE);
g.clearRect(0, 0, 139, 139);
g.setColor(Color.BLACK);
if (d.length>0 && d.length <123){
boolean[][] b = qrcode.calQrcode(d);
for (int i=0;i<b.length;i++){
for (int j=0;j<b.length;j++){
if (b[j][i]) {
g.fillRect(j*3+2,i*3+2,3,3);
}
}
}
} [NextPage] g.dispose();
bi.flush();
String FilePath="TestQRCode.png";
File f = new File(FilePath);
ImageIO.write(bi, "png", f);
System.out.println("doned!");
}
}
import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; import com.swetake.util.Qrcode; public class QRCodeEncoderTest { public static void main(String[] args) throws Exception { Qrcode qrcode=new Qrcode(); qrcode.setQrcodeErrorCorrect('M'); qrcode.setQrcodeEncodeMode('B'); qrcode.setQrcodeVersion(7); String testString = "_-+^%$#@!~`=&)*("; byte[] d =testString.getBytes("GBK"); 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="TestQRCode.png"; File f = new File(FilePath); ImageIO.write(bi, "png", f); System.out.println("doned!"); } }
解码测试：
Java代码
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() {
} [NextPage] public static void main(String[] args) {
QRCodeDecoder decoder = new QRCodeDecoder();
File imageFile = new File("TestQRCode.png");
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)),"GBK");
System.out.println(decodedData);
} catch (DecodingFailedException dfe) {
System.out.println("Error: " + dfe.getMessage());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
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);
}
}
