原文地址:java二维码的生成以及解析作者:酷云
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:
解码测试:
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);
- }
- }
- }
- }
- 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:
- 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() {
- }
- 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);
- }
- }
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