QRCode 实现 二维码 加密解密
Encoder
import java.awt.Color;import java.awt.Graphics2D;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.nio.charset.Charset;import javax.imageio.ImageIO;import com.swetake.util.Qrcode;public class Encoder{private Qrcode qrCode;public Encoder(){init();}private void init(){qrCode = new Qrcode();qrCode.setQrcodeErrorCorrect('M');qrCode.setQrcodeEncodeMode('B');qrCode.setQrcodeVersion(7);}private Graphics2D createGraphics(BufferedImage bi){Graphics2D g = bi.createGraphics();g.setBackground(Color.WHITE);g.clearRect(0, 0, 139, 139);g.setColor(Color.BLACK);return g;}private void drawImage(Graphics2D g, byte[] d){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);}}}}}private void saveImage(BufferedImage bi, String fileName){File f = new File(fileName);try{ImageIO.write(bi, "jpg", f);}catch (IOException e){// TODO Auto-generated catch blocke.printStackTrace();}}public void convertText2Image(String text, String fileName){if(null == text){return;}byte[] d = text.getBytes(Charset.defaultCharset());BufferedImage bi = new BufferedImage(139, 139, BufferedImage.TYPE_INT_RGB);Graphics2D g = createGraphics(bi);drawImage(g, d);g.dispose();bi.flush();saveImage(bi, fileName);} }import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.nio.charset.Charset;import javax.imageio.ImageIO;import jp.sourceforge.qrcode.QRCodeDecoder;import jp.sourceforge.qrcode.data.QRCodeImage;import jp.sourceforge.qrcode.exception.DecodingFailedException;public class Decoder{private QRCodeDecoder decoder;public Decoder(){init();}private void init(){decoder = new QRCodeDecoder();}public String convertImage2String(String fileName){String decodedData = null;File imageFile = new File(fileName); BufferedImage image = null; try { image = ImageIO.read(imageFile); } catch (IOException e) { System.out.println("Error: "+ e.getMessage()); } try { decodedData = new String(decoder.decode(new J2SEImage(image)),Charset.defaultCharset()); } catch (DecodingFailedException dfe) { System.out.println("Error: " + dfe.getMessage()); } return decodedData;} } 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); } }import com.huawei.demo.decode.Decoder;import com.huawei.demo.encode.Encoder;public class Test{public static void main(String[] args){String fileName = "C:\\text.jpg";Encoder encoder = new Encoder();encoder.convertText2Image("I love you", fileName);Decoder decoder = new Decoder();String text = decoder.convertImage2String(fileName);System.out.println(text);}}