com.google.zxing.qrcode.QRCodeWriter#encode

Source File: QrCodeCreateUtil.java From java-study with Apache License 2.0

6 votes

/**
 * 生成包含字符串信息的二维码图片
 *
 * @param outputStream 文件输出流路径
 * @param content      二维码携带信息
 * @param qrCodeSize   二维码图片大小
 * @param imageFormat  二维码的格式
 * @throws WriterException
 * @throws IOException
 */
public static boolean createQrCode(OutputStream outputStream, String content, int qrCodeSize, String imageFormat) throws WriterException, IOException {
    //设置二维码纠错级别ＭＡＰ
    Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
    hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);  // 矫错级别
    QRCodeWriter qrCodeWriter = new QRCodeWriter();
    //创建比特矩阵(位矩阵)的QR码编码的字符串
    BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, qrCodeSize, qrCodeSize, hintMap);
    // 使BufferedImage勾画QRCode  (matrixWidth 是行二维码像素点)
    int matrixWidth = byteMatrix.getWidth();
    BufferedImage image = new BufferedImage(matrixWidth - 200, matrixWidth - 200, BufferedImage.TYPE_INT_RGB);
    image.createGraphics();
    Graphics2D graphics = (Graphics2D) image.getGraphics();
    graphics.setColor(Color.WHITE);
    graphics.fillRect(0, 0, matrixWidth, matrixWidth);
    // 使用比特矩阵画并保存图像
    graphics.setColor(Color.BLACK);
    for (int i = 0; i < matrixWidth; i++) {
        for (int j = 0; j < matrixWidth; j++) {
            if (byteMatrix.get(i, j)) {
                graphics.fillRect(i - 100, j - 100, 1, 1);
            }
        }
    }
    return ImageIO.write(image, imageFormat, outputStream);
}

Source File: MainActivity.java From ExamplesAndroid with Apache License 2.0

6 votes

public static Bitmap encodeToQrCode(String text, int width, int height){
    QRCodeWriter writer = new QRCodeWriter();
    BitMatrix matrix = null;
    try {
        matrix = writer.encode(text, BarcodeFormat.QR_CODE, 100, 100);
    } catch (WriterException ex) {
        ex.printStackTrace();
    }
    Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
    for (int x = 0; x < width; x++){
        for (int y = 0; y < height; y++){
            bmp.setPixel(x, y, matrix.get(x,y) ? Color.BLACK : Color.WHITE);
        }
    }
    return bmp;
}

Source File: QRCodeController.java From eds-starter6-jpa with Apache License 2.0

6 votes

@RequireAnyAuthority
@RequestMapping(value = "/qr", method = RequestMethod.GET)
public void qrcode(HttpServletResponse response,
		@AuthenticationPrincipal JpaUserDetails jpaUserDetails)
		throws WriterException, IOException {

	User user = jpaUserDetails.getUser(this.jpaQueryFactory);
	if (user != null && StringUtils.hasText(user.getSecret())) {
		response.setContentType("image/png");
		String contents = "otpauth://totp/" + user.getEmail() + "?secret="
				+ user.getSecret() + "&issuer=" + this.appName;

		QRCodeWriter writer = new QRCodeWriter();
		BitMatrix matrix = writer.encode(contents, BarcodeFormat.QR_CODE, 200, 200);
		MatrixToImageWriter.writeToStream(matrix, "PNG", response.getOutputStream());
		response.getOutputStream().flush();
	}
}

Source File: QRCodeHelper.java From AndroidWallet with GNU General Public License v3.0

6 votes

public static Bitmap generateBitmap(String content, int width, int height) {
    int margin = 5;  //自定义白边边框宽度
    QRCodeWriter qrCodeWriter = new QRCodeWriter();
    Hashtable hints = new Hashtable<>();
    hints.put(EncodeHintType.MARGIN, 0);
    hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
    try {
        BitMatrix encode = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
      //  encode = updateBit(encode, margin);  //生成新的bitMatrix
        int[] pixels = new int[width * height];
        for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {
                if (encode.get(j, i)) {
                    pixels[i * width + j] = 0x00000000;
                } else {
                    pixels[i * width + j] = 0xffffffff;
                }
            }
        }
        return Bitmap.createBitmap(pixels, 0, width, width, height, Bitmap.Config.RGB_565);
    } catch (WriterException e) {
        e.printStackTrace();
    }
    return null;
}

Source File: BarcodeProvider.java From Pix-Art-Messenger with GNU General Public License v3.0

6 votes

public static Bitmap create2dBarcodeBitmap(String input, int size) {
    try {
        final QRCodeWriter barcodeWriter = new QRCodeWriter();
        final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        final BitMatrix result = barcodeWriter.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
        final int width = result.getWidth();
        final int height = result.getHeight();
        final int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            final int offset = y * width;
            for (int x = 0; x < width; x++) {
                pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.WHITE;
            }
        }
        final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    } catch (final Exception e) {
        e.printStackTrace();
        return null;
    }
}

Source File: BarcodeProvider.java From Conversations with GNU General Public License v3.0

6 votes

public static Bitmap create2dBarcodeBitmap(String input, int size) {
	try {
		final QRCodeWriter barcodeWriter = new QRCodeWriter();
		final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
		hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
		final BitMatrix result = barcodeWriter.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
		final int width = result.getWidth();
		final int height = result.getHeight();
		final int[] pixels = new int[width * height];
		for (int y = 0; y < height; y++) {
			final int offset = y * width;
			for (int x = 0; x < width; x++) {
				pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.WHITE;
			}
		}
		final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
		bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
		return bitmap;
	} catch (final Exception e) {
		e.printStackTrace();
		return null;
	}
}

Source File: MobileServerPreference.java From Quelea with GNU General Public License v3.0

6 votes

private Image getQRImage() {
    if (qrImage == null) {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        int qrWidth = 500;
        int qrHeight = 500;
        BitMatrix byteMatrix = null;
        try {
            byteMatrix = qrCodeWriter.encode(getMLURL(), BarcodeFormat.QR_CODE, qrWidth, qrHeight);
        } catch (WriterException ex) {
            LOGGER.log(Level.WARNING, "Error writing QR code", ex);
        }
        qrImage = MatrixToImageWriter.toBufferedImage(byteMatrix);
    }
    WritableImage fxImg = new WritableImage(500, 500);
    SwingFXUtils.toFXImage(qrImage, fxImg);
    return fxImg;
}

Source File: ReceivePanel.java From snowblossom with Apache License 2.0

5 votes

public void runPass()
 {
try
{
     String wallet_name = (String)wallet_select_box.getSelectedItem();
     if (wallet_name == null)
     {
       setMessageBox("no wallet selected");
       setStatusBox("");
       return;
     }
     
     SnowBlossomClient client = ice_leaf.getWalletPanel().getWallet( wallet_name );
     if (client == null)
     {
       setMessageBox("no wallet selected");
       setStatusBox("");
       return;
     }
     
     AddressSpecHash spec = client.getPurse().getUnusedAddress(false,false);
     String address_str = spec.toAddressString(ice_leaf.getParams());

     QRCodeWriter qrCodeWriter = new QRCodeWriter();
     BitMatrix bit_matrix = qrCodeWriter.encode(address_str, BarcodeFormat.QR_CODE, qr_size, qr_size);

     BufferedImage bi = MatrixToImageWriter.toBufferedImage(bit_matrix);

     setQrImage(bi);

     setStatusBox(address_str);
     setMessageBox("");

}
catch(Throwable t)
{
	setMessageBox(ErrorUtil.getThrowInfo(t));
     setStatusBox("");
}
 }

Source File: BluetoothServer.java From ShootOFF with GNU General Public License v3.0

5 votes

private Optional<Image> generateQrCode(String address) {
	final QRCodeWriter qrCodeWriter = new QRCodeWriter();
	final int width = 300;
	final int height = 300;

	try {
		final BitMatrix byteMatrix = qrCodeWriter.encode(address, BarcodeFormat.QR_CODE, width, height);
		final BufferedImage qrCodeImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		qrCodeImage.createGraphics();

		final Graphics2D graphics = (Graphics2D) qrCodeImage.getGraphics();
		graphics.setColor(Color.WHITE);
		graphics.fillRect(0, 0, width, height);
		graphics.setColor(Color.BLACK);

		for (int i = 0; i < height; i++) {
			for (int j = 0; j < width; j++) {
				if (byteMatrix.get(i, j)) {
					graphics.fillRect(i, j, 1, 1);
				}
			}
		}

		return Optional.of(SwingFXUtils.toFXImage(qrCodeImage, null));
	} catch (WriterException e) {
		logger.error("Failed to encode local bluetooth address as a qr code", e);
		return Optional.empty();
	}
}

Source File: Utils.java From evt4j with MIT License

5 votes

public static byte[] getQrImageInBytes(String rawText) throws WriterException, IOException {
    int width = 600;
    int height = 600;

    Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
    hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);

    QRCodeWriter qrCodeWriter = new QRCodeWriter();
    BitMatrix bitMatrix = qrCodeWriter.encode(rawText, BarcodeFormat.QR_CODE, width, height, hints);

    ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
    MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);

    return pngOutputStream.toByteArray();
}

Source File: ShadowSocksSerivceImpl.java From ShadowSocks-Share with Apache License 2.0

5 votes

/**
 * 生成二维码
 */
@Override
public byte[] createQRCodeImage(String text, int width, int height) throws WriterException, IOException {
	QRCodeWriter qrCodeWriter = new QRCodeWriter();
	BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);

	ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
	MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);
	byte[] pngData = pngOutputStream.toByteArray();
	return pngData;
}

Source File: CreateScan.java From Android with MIT License

5 votes

public Bitmap generateQRCode(String content,int colorBg) {
    try {
        QRCodeWriter writer = new QRCodeWriter();
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); //coding
        //hints.put(EncodeHintType.ERROR_CORRECTION, level); //Fault tolerance
        hints.put(EncodeHintType.MARGIN, 0);  //Two dimensional code frame width, where the document says 0-4
        BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, widthDef, heightDef,hints);
        return bitMatrix2Bitmap(matrix,colorBg);
    } catch (WriterException e) {
        e.printStackTrace();
    }
    return null;
}

Source File: TransferEntriesActivity.java From Aegis with GNU General Public License v3.0

5 votes

private void generateQR() {
    GoogleAuthInfo selectedEntry = _authInfos.get(_currentEntryCount - 1);
    _issuer.setText(selectedEntry.getIssuer());
    _accountName.setText(selectedEntry.getAccountName());
    _entriesCount.setText(String.format(getString(R.string.entries_count), _currentEntryCount, _authInfos.size()));

    QRCodeWriter writer = new QRCodeWriter();
    BitMatrix bitMatrix = null;
    try {
        bitMatrix = writer.encode(selectedEntry.getUri().toString(), BarcodeFormat.QR_CODE, 512, 512);
    } catch (WriterException e) {
        Dialogs.showErrorDialog(this, R.string.unable_to_generate_qrcode, e);
        return;
    }

    int width = bitMatrix.getWidth();
    int height = bitMatrix.getHeight();
    int[] pixels = new int[width * height];
    for (int y = 0; y < height; y++) {
        int offset = y * width;
        for (int x = 0; x < width; x++) {
            pixels[offset + x] = bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE;
        }
    }

    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    _qrImage.setImageBitmap(bitmap);
}

Source File: GenerateQRCode.java From journaldev with MIT License

5 votes

private static void createQRImage(File qrFile, String qrCodeText, int size, String fileType)
		throws WriterException, IOException {
	// Create the ByteMatrix for the QR-Code that encodes the given String
	Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<>();
	hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
	QRCodeWriter qrCodeWriter = new QRCodeWriter();
	BitMatrix byteMatrix = qrCodeWriter.encode(qrCodeText, BarcodeFormat.QR_CODE, size, size, hintMap);
	// Make the BufferedImage that are to hold the QRCode
	int matrixWidth = byteMatrix.getWidth();
	BufferedImage image = new BufferedImage(matrixWidth, matrixWidth, BufferedImage.TYPE_INT_RGB);
	image.createGraphics();

	Graphics2D graphics = (Graphics2D) image.getGraphics();
	graphics.setColor(Color.WHITE);
	graphics.fillRect(0, 0, matrixWidth, matrixWidth);
	// Paint and save the image using the ByteMatrix
	graphics.setColor(Color.BLACK);

	for (int i = 0; i < matrixWidth; i++) {
		for (int j = 0; j < matrixWidth; j++) {
			if (byteMatrix.get(i, j)) {
				graphics.fillRect(i, j, 1, 1);
			}
		}
	}
	ImageIO.write(image, fileType, qrFile);
}

Source File: BookLibraryRestController.java From personal_book_library_web_project with MIT License

5 votes

@RequestMapping(value = "/otp/qrcode/{userid}.png", method = RequestMethod.GET)
  public void generateQRCode(HttpServletResponse response, @PathVariable("userid") Long userId) throws WriterException, IOException {
      
String otpProtocol = userService.generateOTPProtocol(userId);
      response.setContentType("image/png");
      
      QRCodeWriter writer = new QRCodeWriter();
      BitMatrix matrix = writer.encode(otpProtocol, BarcodeFormat.QR_CODE, 250, 250);
      MatrixToImageWriter.writeToStream(matrix, "PNG", response.getOutputStream());
      response.getOutputStream().flush();
  }

Source File: QrCodeUtility.java From ethereum-paper-wallet with Apache License 2.0

5 votes

public static byte[] contentToPngBytes(String content, int size) {
	try {
		Map<EncodeHintType, Object> hintMap = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
		hintMap.put(EncodeHintType.MARGIN, 0);
		hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
		hintMap.put(EncodeHintType.CHARACTER_SET, ENCODING_TYPE);

		QRCodeWriter qrWriter = new QRCodeWriter();
		BitMatrix qrMatrix = qrWriter.encode(content, BarcodeFormat.QR_CODE, size, size, hintMap);
		int width = qrMatrix.getWidth();
		BufferedImage image = new BufferedImage(width, width,
				BufferedImage.TYPE_INT_RGB);
		image.createGraphics();

		Graphics2D graphics = (Graphics2D) image.getGraphics();
		graphics.setColor(Color.WHITE);
		graphics.fillRect(0, 0, width, width);
		graphics.setColor(Color.BLACK);

		for (int i = 0; i < width; i++) {
			for (int j = 0; j < width; j++) {
				if (qrMatrix.get(i, j)) {
					graphics.fillRect(i, j, 1, 1);
				}
			}
		}

		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		ImageIO.write(image, IMAGE_FILE_TYPE, bos);

		return bos.toByteArray();
	}
	catch (Exception e) {
		throw new RuntimeException("Failed to produce image byte array", e);
	}
}

Source File: GroupDetailActivity.java From Rumble with GNU General Public License v3.0

5 votes

public void invite() {
    String buffer = group.getGroupBase64ID();
    int size = 200;
    Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
    hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
    QRCodeWriter qrCodeWriter = new QRCodeWriter();
    try {
        BitMatrix bitMatrix = qrCodeWriter.encode(buffer, BarcodeFormat.QR_CODE, size, size, hintMap);
        Bitmap image = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);

        if(image != null) {
            for (int i = 0; i < size; i++) {
                for (int j = 0; j < size; j++) {
                    image.setPixel(i, j, bitMatrix.get(i, j) ? Color.BLACK : Color.WHITE);
                }
            }
            Intent intent = new Intent(this, DisplayQRCode.class);
            intent.putExtra("EXTRA_GROUP_NAME", groupName);
            intent.putExtra("EXTRA_BUFFER", buffer);
            intent.putExtra("EXTRA_QRCODE", image);
            startActivity(intent);
            overridePendingTransition(R.anim.activity_open_enter, R.anim.activity_open_exit);
        }
    }catch(WriterException ignore) {
    }
    //}
}

Source File: ZxingBarcodeGenerator.java From tutorials with MIT License

4 votes

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);
}

Source File: MyQRCodeUtils.java From spring-boot with Apache License 2.0

3 votes

/**
 * 创建 QRCode 图片文件
 *
 * @param file            图片
 * @param imageFormat     图片编码格式
 * @param encodeContent   QRCode 内容
 * @param imageSize       图片大小
 * @param foreGroundColor 前景色
 * @param backGroundColor 背景色
 * @throws WriterException
 * @throws IOException
 */
public static void createQRCodeImageFile(Path file, ImageFormat imageFormat, String encodeContent, Dimension imageSize, Color foreGroundColor, Color backGroundColor) throws WriterException, IOException {
    Assert.isTrue(FilenameUtils.getExtension(file.toString()).toUpperCase().equals(imageFormat.toString()), "文件扩展名和格式不一致");
    QRCodeWriter qrWrite = new QRCodeWriter();
    BitMatrix matrix = qrWrite.encode(encodeContent, BarcodeFormat.QR_CODE, imageSize.width, imageSize.height);
    MatrixToImageWriter.writeToPath(matrix, imageFormat.toString(), file, new MatrixToImageConfig(foreGroundColor.getRGB(), backGroundColor.getRGB()));
}

Source File: MyQRCodeUtils.java From spring-boot with Apache License 2.0

3 votes

/**
 * 创建 QRCode 图片文件输出流，用于在线生成动态图片
 *
 * @param stream
 * @param imageFormat
 * @param encodeContent
 * @param imageSize
 * @param foreGroundColor
 * @param backGroundColor
 * @throws WriterException
 * @throws IOException
 */
public static void createQRCodeImageStream(OutputStream stream, ImageFormat imageFormat, String encodeContent, Dimension imageSize, Color foreGroundColor, Color backGroundColor) throws WriterException, IOException {

    QRCodeWriter qrWrite = new QRCodeWriter();
    BitMatrix matrix = qrWrite.encode(encodeContent, BarcodeFormat.QR_CODE, imageSize.width, imageSize.height);
    MatrixToImageWriter.writeToStream(matrix, imageFormat.toString(), stream, new MatrixToImageConfig(foreGroundColor.getRGB(), backGroundColor.getRGB()));
}

Java Code Examples for com.google.zxing.qrcode.QRCodeWriter#encode()