Google Zxing 二维码生成与解析

    public static String createQrcode(String _text){
        String qrcodeFilePath = "";
        try {
            int qrcodeWidth = 300;
            int qrcodeHeight = 300;
            String qrcodeFormat = "png";
            HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            BitMatrix bitMatrix = new MultiFormatWriter().encode('http://www.cnblogs.com/java-class/', BarcodeFormat.QR_CODE, qrcodeWidth, qrcodeHeight, hints);

            BufferedImage image = new BufferedImage(qrcodeWidth, qrcodeHeight, BufferedImage.TYPE_INT_RGB);
            Random random = new Random();
            File QrcodeFile = new File("F:\\qrcode\\" + random.nextInt() + "." + qrcodeFormat);
            ImageIO.write(image, qrcodeFormat, QrcodeFile);
            MatrixToImageWriter.writeToFile(bitMatrix, qrcodeFormat, QrcodeFile);
            qrcodeFilePath = QrcodeFile.getAbsolutePath();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return qrcodeFilePath;
    }

   public static String decodeQr(String filePath) {
        String retStr = "";
        if ("".equalsIgnoreCase(filePath) && filePath.length() == 0) {
            return "图片路径为空!";
        }
        try {
            BufferedImage bufferedImage = ImageIO.read(new FileInputStream(filePath));
            LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);
            Binarizer binarizer = new HybridBinarizer(source);
            BinaryBitmap bitmap = new BinaryBitmap(binarizer);
            HashMap<DecodeHintType, Object> hintTypeObjectHashMap = new HashMap<>();
            hintTypeObjectHashMap.put(DecodeHintType.CHARACTER_SET, "UTF-8");
            Result result = new MultiFormatReader().decode(bitmap, hintTypeObjectHashMap);
            retStr = result.getText();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return retStr;
    }