com.google.zxing.client.j2se.MatrixToImageWriter#toBufferedImage ( )源码实例Demo

/**
 * 生成二维码并响应到浏览器
 *
 * @param content
 * @param response
 */
public static void createQRCode(String content, HttpServletResponse response) {
    int width = 300, height = 300;
    String format = "png";
    Map<EncodeHintType, Object> hashMap = new HashMap<>();
    hashMap.put(EncodeHintType.CHARACTER_SET, StandardCharsets.UTF_8);
    hashMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
    hashMap.put(EncodeHintType.MARGIN, 1);
    try {
        response.setHeader("Cache-control", "no-cache");
        response.setHeader("Pragma", "no-cache");
        response.setHeader("content-type", "image/png");
        response.setCharacterEncoding(StandardCharsets.UTF_8.displayName());
        response.setDateHeader("Expires", 0);
        BitMatrix bitMatrix = new MultiFormatWriter()
                .encode(content, BarcodeFormat.QR_CODE, width, height, hashMap);
        BufferedImage img = MatrixToImageWriter.toBufferedImage(bitMatrix);
        ImageIO.write(img, format, response.getOutputStream());
    } catch (Exception e) {
        log.warn("create QRCode error message:{}", e.getMessage());
    }
}
 

public static BufferedImage PDF417(String code, int pdf417ErrorCorrectionLevel,
        Compaction pdf417Compact,
        int pdf417Width, int pdf417Height, int pdf417Margin) {
    try {
        HashMap hints = new HashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        hints.put(EncodeHintType.ERROR_CORRECTION, pdf417ErrorCorrectionLevel);
        hints.put(EncodeHintType.MARGIN, pdf417Margin);
        if (pdf417Compact == null) {
            hints.put(EncodeHintType.PDF417_COMPACT, false);
        } else {
            hints.put(EncodeHintType.PDF417_COMPACT, true);
            hints.put(EncodeHintType.PDF417_COMPACTION, pdf417Compact);
        }

        BitMatrix bitMatrix = new MultiFormatWriter().encode(code,
                BarcodeFormat.PDF_417, pdf417Width, pdf417Height, hints);

        return MatrixToImageWriter.toBufferedImage(bitMatrix);

    } catch (Exception e) {
        logger.error(e.toString());
        return null;
    }
}
 

public static BufferedImage DataMatrix(String code,
        int dmWidth, int dmHeigh) {
    try {
        HashMap hints = new HashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

        BitMatrix bitMatrix = new MultiFormatWriter().encode(code,
                BarcodeFormat.DATA_MATRIX, dmWidth, dmHeigh, hints);

        return MatrixToImageWriter.toBufferedImage(bitMatrix);

    } catch (Exception e) {
        logger.error(e.toString());
        return null;
    }
}
 

/**
 * 生成带有logo的二维码
 * @param text 生成文本
 * @param logoInputStream logo文件输入流
 * @param qrCodeWidth 二维码宽度
 * @param qrCodeHeight 二维码高度
 * @param logoWidth logo宽度
 * @param logoHeight logo高度
 * @param ENCODE_HINTS 二维码配置
 * @return 输出流
 * @throws WriterException
 * @throws IOException
 */
private static Thumbnails.Builder<BufferedImage> createWidthLogo(String text, InputStream logoInputStream, int qrCodeWidth, int qrCodeHeight, int logoWidth, int logoHeight,
                                            String format, Map<EncodeHintType, Object> ENCODE_HINTS) throws WriterException, IOException {
    BitMatrix bitMatrix = createBitMatrix(text, BarcodeFormat.QR_CODE, qrCodeWidth, qrCodeHeight, ENCODE_HINTS);
    /* 生成二维码的bufferedImage */
    BufferedImage qrcode = MatrixToImageWriter.toBufferedImage(bitMatrix);
    /* 创建图片构件对象 */
    Thumbnails.Builder<BufferedImage> builder = Thumbnails.of(new BufferedImage(qrCodeWidth, qrCodeHeight, BufferedImage.TYPE_INT_RGB));
    BufferedImage logo = ImageIO.read(logoInputStream);
    BufferedImage logoImage = Thumbnails.of(logo).size(logoWidth, logoHeight).asBufferedImage();
    /* 设置logo水印位置居中,不透明  */
    builder.watermark(Positions.CENTER, qrcode, 1F)
            .watermark(Positions.CENTER, logoImage, 1F)
            .scale(1F)
            .outputFormat(format);
    return builder;
}
 

/**
 * 二维码信息写成JPG BufferedImage
 *
 * @param content
 * @param width
 * @param height
 * @return
 */
public static BufferedImage writeInfoToJpgBuffImg(String content, int width, int height) {
    if (width < 250) {
        width = 250;
    }
    if (height < 250) {
        height = 250;
    }
    BufferedImage re = null;

    MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
    Map hints = new HashMap();
    hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
    try {
        BitMatrix bitMatrix = multiFormatWriter.encode(content,
                BarcodeFormat.QR_CODE, width, height, hints);
        re = MatrixToImageWriter.toBufferedImage(bitMatrix);
    } catch (Exception e) {
        e.printStackTrace();
    }

    return re;
}
 

@ResponseBody
@RequestMapping(method = RequestMethod.GET, value = "/{productId}/ean")
public ResponseEntity<?> getProductEAN(@PathVariable String productId) throws WriterException, IOException {
    Product product = repository.findOne(productId);
    if (product == null) {
        return ResponseEntity.notFound().build();
    }
    EAN13Writer ean13Writer = new EAN13Writer();
    BitMatrix matrix = ean13Writer.encode(product.getEan(), BarcodeFormat.EAN_13, 300, 200);
    BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(matrix);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ImageIO.write(bufferedImage, "png", baos);
    byte[] imageData = baos.toByteArray();
    ByteArrayResource byteArrayResource = new ByteArrayResource(imageData);
    return ResponseEntity.ok().contentType(MediaType.IMAGE_PNG).body(byteArrayResource);
}
 

public static byte[] createQRCodeWithDescription(String text, String description) {
    try (InputStream fi = new ClassPathResource("/alfio/font/DejaVuSansMono.ttf").getInputStream();
         ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
        BitMatrix matrix = drawQRCode(text);
        BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(matrix);
        BufferedImage scaled = new BufferedImage(200, 230, BufferedImage.TYPE_INT_ARGB);
        Graphics2D graphics = (Graphics2D)scaled.getGraphics();
        graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        graphics.drawImage(bufferedImage, 0,0, null);
        graphics.setColor(Color.WHITE);
        graphics.fillRect(0, 200, 200, 30);
        graphics.setColor(Color.BLACK);
        graphics.setFont(Font.createFont(Font.TRUETYPE_FONT, fi).deriveFont(14f));
        graphics.drawString(center(truncate(description, 23), 25), 0, 215);
        ImageIO.write(scaled, "png", baos);
        return baos.toByteArray();
    } catch (WriterException | IOException | FontFormatException e) {
        throw new IllegalStateException(e);
    }
}
 

/**
 * 创建二维码
 *
 * @param content 二维码内容
 * @param width   宽度
 * @param height  高度
 * @param margin  二维码边距
 * @return BufferedImage 返回图片
 * @throws WriterException 异常
 */
public static BufferedImage createQrCode(String content, int width, int height, int margin) throws WriterException {

    Map<EncodeHintType, Comparable> hints = new HashMap<>();

    hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 字符串编码
    hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M); // 纠错等级
    hints.put(EncodeHintType.MARGIN, margin); // 图片边距
    QRCodeWriter writer = new QRCodeWriter();

    return MatrixToImageWriter.toBufferedImage(writer.encode(content, BarcodeFormat.QR_CODE, width, height, hints));
}
 

public static BufferedImage qRCodeCommon(String content, String imgType, int size){
    int imgSize = 67 + 12 * (size - 1);
    Hashtable hints = new Hashtable();
    hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
    hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
    hints.put(EncodeHintType.MARGIN, 2);
    try{
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, imgSize, imgSize, hints);
        return MatrixToImageWriter.toBufferedImage(bitMatrix);
    }catch (WriterException e){
        e.printStackTrace();
    }
    return null;
}
 

public static BufferedImage generateCode128BarcodeImage(String barcodeText) throws Exception {
    Code128Writer barcodeWriter = new Code128Writer();
    BitMatrix bitMatrix = barcodeWriter.encode(barcodeText, BarcodeFormat.CODE_128, 300, 150);

    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

public static BufferedImage generateQRCodeImage(String barcodeText) throws Exception {
    QRCodeWriter barcodeWriter = new QRCodeWriter();
    BitMatrix bitMatrix = barcodeWriter.encode(barcodeText, BarcodeFormat.QR_CODE, 200, 200);

    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

public static BufferedImage QR(String code,
            ErrorCorrectionLevel qrErrorCorrectionLevel,
            int qrWidth, int qrHeight, int qrMargin, File picFile) {
        try {
            HashMap hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            hints.put(EncodeHintType.ERROR_CORRECTION, qrErrorCorrectionLevel);
            hints.put(EncodeHintType.MARGIN, qrMargin);

            QRCodeWriter writer = new QRCodeWriter();
            BitMatrix bitMatrix = writer.encode(code,
                    BarcodeFormat.QR_CODE, qrWidth, qrHeight, hints);

            BufferedImage qrImage = MatrixToImageWriter.toBufferedImage(bitMatrix);
            if (picFile != null) {
                BufferedImage pic = ImageFileReaders.readImage(picFile);
                if (pic != null) {
                    double ratio = 2;
                    switch (qrErrorCorrectionLevel) {
                        case L:
                            ratio = 0.16;
                            break;
                        case M:
                            ratio = 0.20;
                            break;
                        case Q:
                            ratio = 0.25;
                            break;
                        case H:
                            ratio = 0.30;
                            break;
                    }
                    // https://www.cnblogs.com/tuyile006/p/3416008.html
//                    ratio = Math.min(2 / 7d, ratio);
                    int width = (int) ((qrImage.getWidth() - writer.leftPadding * 2) * ratio);
                    int height = (int) ((qrImage.getHeight() - writer.topPadding * 2) * ratio);
                    return BarcodeTools.centerPicture(qrImage, pic, width, height);
                }
            }
            return qrImage;

        } catch (Exception e) {
            logger.error(e.toString());
            return null;
        }
    }
 

public static BufferedImage generatePDF417BarcodeImage(String barcodeText) throws Exception {
    PDF417Writer barcodeWriter = new PDF417Writer();
    BitMatrix bitMatrix = barcodeWriter.encode(barcodeText, BarcodeFormat.PDF_417, 700, 700);

    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

public static BufferedImage createQRImage(String inviteUrl) throws WriterException {
    BitMatrix bitMatrix = getBitMatrix(inviteUrl);
    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

public static BufferedImage generateUPCABarcodeImage(String barcodeText) throws Exception {
    UPCAWriter barcodeWriter = new UPCAWriter();
    BitMatrix bitMatrix = barcodeWriter.encode(barcodeText, BarcodeFormat.UPC_A, 300, 150);

    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

public static BufferedImage generateEAN13BarcodeImage(String barcodeText) throws Exception {
    EAN13Writer barcodeWriter = new EAN13Writer();
    BitMatrix bitMatrix = barcodeWriter.encode(barcodeText, BarcodeFormat.EAN_13, 300, 150);

    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

/**
 * 返回一个 BufferedImage 对象
 *
 * @param content 二维码内容
 * @param width   宽
 * @param height  高
 */
public static BufferedImage toBufferedImage(String content, int width, int height) throws WriterException, IOException {
    BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

/**
 * CODE_128
 *
 * @param content
 * @return
 */
public static BufferedImage createBarCode(String content) {
    BitMatrix bitMatrix = createBarCode(content, BarcodeFormat.CODE_128, 320);
    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

/**
 * 返回一个 BufferedImage 对象
 *
 * @param content 二维码内容
 */
public static BufferedImage toBufferedImage(String content) throws WriterException {
	BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, HINTS);
	return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
 

/**
 * 返回一个 BufferedImage 对象
 *
 * @param content 二维码内容
 * @param width 宽
 * @param height 高
 */
public static BufferedImage toBufferedImage(String content, int width, int height)
		throws WriterException {
	BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, HINTS);
	return MatrixToImageWriter.toBufferedImage(bitMatrix);
}