Examples with MatrixToImageConfig com.google.zxing.client.j2se.MatrixToImageConfig used on opensource projects

Example 1 with MatrixToImageConfig

use of com.google.zxing.client.j2se.MatrixToImageConfig in project DevKits by qmjy.

the class DKSystemUtil method generateQrImg.

/**
 * 生成二维码
 *
 * @param text   二维码内容
 * @param width  二维码图片宽度
 * @param height 二维码图片高度
 * @return 二维码图片缓冲流
 */
public static BufferedImage generateQrImg(String text, int width, int height) {
    HashMap hashMap = new HashMap();
    // 设置二维码字符编码
    hashMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");
    // 设置二维码纠错等级
    hashMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
    // 设置二维码边距
    hashMap.put(EncodeHintType.MARGIN, 2);
    try {
        BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hashMap);
        MatrixToImageConfig matrixToImageConfig = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF);
        BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(bitMatrix, matrixToImageConfig);
        return bufferedImage;
    } catch (WriterException e) {
        LOGGER.error("Generate QR file failed...");
    }
    return null;
}

Example 2 with MatrixToImageConfig

use of com.google.zxing.client.j2se.MatrixToImageConfig in project i2pplus by I2PPlus.

the class QRServlet method doGet.

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    if (request.getCharacterEncoding() == null)
        request.setCharacterEncoding("UTF-8");
    String codeParam = request.getParameter(PARAM_IDENTICON_CODE_SHORT);
    boolean codeSpecified = codeParam != null && codeParam.length() > 0;
    if (!codeSpecified) {
        response.setStatus(403);
        return;
    }
    String sizeParam = request.getParameter(PARAM_IDENTICON_SIZE_SHORT);
    // very rougly, number of "modules" is about 4 * sqrt(chars)
    // (assuming 7 bit) default margin each side is 4
    // assuming level L
    // min modules is 21x21
    // shoot for 2 pixels per module
    int size = Math.max(50, (2 * 4) + (int) (2 * 5 * Math.sqrt(codeParam.length())));
    if (sizeParam != null) {
        try {
            size = Integer.parseInt(sizeParam);
            if (size < 40)
                size = 40;
            else if (size > 1024)
                size = 1024;
        } catch (NumberFormatException nfe) {
        }
    }
    String identiconETag = IdenticonUtil.getIdenticonETag(codeParam.hashCode(), size, version);
    String requestETag = request.getHeader("If-None-Match");
    if (requestETag != null && requestETag.equals(identiconETag)) {
        response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
    } else {
        byte[] imageBytes = null;
        // retrieve image bytes from either cache or renderer
        if (cache == null || (imageBytes = cache.get(identiconETag)) == null) {
            ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
            QRCodeWriter qrcw = new QRCodeWriter();
            BitMatrix matrix;
            try {
                matrix = qrcw.encode(codeParam, BarcodeFormat.QR_CODE, size, size);
            } catch (WriterException we) {
                throw new IOException("encode failed", we);
            }
            String text = request.getParameter(PARAM_IDENTICON_TEXT_SHORT);
            if (text != null) {
                // add 1 so it generates RGB instead of 1 bit,
                // so text anti-aliasing works
                MatrixToImageConfig cfg = new MatrixToImageConfig(MatrixToImageConfig.BLACK + 1, MatrixToImageConfig.WHITE);
                BufferedImage bi = MatrixToImageWriter.toBufferedImage(matrix, cfg);
                Graphics2D g = bi.createGraphics();
                // anti-aliasing and hinting for the text
                // g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
                g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
                g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
                // g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE);
                // g.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
                // g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
                // scale font
                int width = bi.getWidth();
                int height = bi.getHeight();
                float shrink = Math.min(1.0f, 14.0f / text.length());
                if (width >= 256)
                    shrink = Math.min(1.0f, 16.0f / text.length());
                int pts = Math.round(shrink * 16.0f * size / 160);
                if (width >= 256)
                    pts = Math.round(shrink * 16.0f * size / 180);
                Font font = new Font(DEFAULT_FONT_NAME, Font.BOLD, pts);
                g.setFont(font);
                Color color = Color.BLACK;
                g.setColor(color);
                double swidth = font.getStringBounds(text, 0, text.length(), g.getFontRenderContext()).getBounds().getWidth();
                int x = (width - (int) swidth) / 2;
                int y = height - 10;
                if (height >= 256)
                    y = height - ((height / 50) + 10);
                g.drawString(text, x, y);
                if (!ImageIO.write(bi, IDENTICON_IMAGE_FORMAT, byteOut))
                    throw new IOException("ImageIO.write() fail");
            } else {
                MatrixToImageWriter.writeToStream(matrix, IDENTICON_IMAGE_FORMAT, byteOut);
            }
            imageBytes = byteOut.toByteArray();
            if (cache != null)
                cache.add(identiconETag, imageBytes);
        } else {
            response.setStatus(403);
            return;
        }
        // set ETag and, if code was provided, Expires header
        response.setHeader("ETag", identiconETag);
        if (codeSpecified) {
            long expires = System.currentTimeMillis() + identiconExpiresInMillis;
            response.addDateHeader("Expires", expires);
        }
        // return image bytes to requester
        response.setContentType(IDENTICON_IMAGE_MIMETYPE);
        response.setHeader("X-Content-Type-Options", "nosniff");
        response.setHeader("Accept-Ranges", "none");
        response.setHeader("Cache-control", "max-age=2628000, immutable");
        response.setContentLength(imageBytes.length);
        response.getOutputStream().write(imageBytes);
    }
}

Example 3 with MatrixToImageConfig

use of com.google.zxing.client.j2se.MatrixToImageConfig in project sparrow by sparrowwallet.

the class QRDisplayDialog method getQrCode.

private Image getQrCode(String fragment) {
    try {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix qrMatrix = qrCodeWriter.encode(fragment, BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        MatrixToImageWriter.writeToStream(qrMatrix, "PNG", baos, new MatrixToImageConfig());
        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        return new Image(bais);
    } catch (Exception e) {
        log.error("Error generating QR", e);
    }
    return null;
}

Example 4 with MatrixToImageConfig

use of com.google.zxing.client.j2se.MatrixToImageConfig in project lilishop by lilishop.

the class QrCodeKit method encode.

/**
 * 图形码生成工具
 *
 * @param contents        内容
 * @param barcodeFormat   BarcodeFormat对象
 * @param format          图片格式，可选[png,jpg,bmp]
 * @param width           宽
 * @param height          高
 * @param margin          边框间距px
 * @param saveImgFilePath 存储图片的完整位置，包含文件名
 * @return {boolean}
 */
public static boolean encode(String contents, BarcodeFormat barcodeFormat, Integer margin, ErrorCorrectionLevel errorLevel, String format, int width, int height, String saveImgFilePath) {
    boolean bool = false;
    BufferedImage bufImg;
    Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(3);
    // 指定纠错等级
    hints.put(EncodeHintType.ERROR_CORRECTION, errorLevel);
    hints.put(EncodeHintType.MARGIN, margin);
    hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
    try {
        BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, barcodeFormat, width, height, hints);
        MatrixToImageConfig config = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF);
        bufImg = MatrixToImageWriter.toBufferedImage(bitMatrix, config);
        bool = writeToFile(bufImg, format, saveImgFilePath);
    } catch (Exception e) {
        log.error("图形码生成工具生成错误", e);
    }
    return bool;
}

Example 5 with MatrixToImageConfig

use of com.google.zxing.client.j2se.MatrixToImageConfig in project protools by SeanDragon.

the class MatrixToImageWriterEx method writeToFile.

/**
 * 写入二维码、以及将照片logo写入二维码中
 *
 * @param matrix    要写入的二维码
 * @param format    二维码照片格式
 * @param imagePath 二维码照片保存路径
 * @param logoPath  logo路径
 * @throws IOException
 */
public static void writeToFile(BitMatrix matrix, String format, String imagePath, String logoPath) throws IOException {
    MatrixToImageWriter.writeToPath(matrix, format, Paths.get(imagePath), new MatrixToImageConfig());
    // 添加logo图片, 此处一定需要重新进行读取，而不能直接使用二维码的BufferedImage 对象
    BufferedImage img = ImageIO.read(new File(imagePath));
    MatrixToImageWriterEx.overlapImage(img, format, imagePath, logoPath, DEFAULT_CONFIG);
}