Java MatrixToImageWriter.writeToStream方法代码示例

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
/**
 * 将内容contents生成长为width，宽为width的图片,返回刘文静
 */
public static ServletOutputStream getQRCodeImge(String contents, int width, int height) throws IOException {
    ServletOutputStream stream = null;
    try {
        Map<EncodeHintType, Object> hints = Maps.newHashMap();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
        hints.put(EncodeHintType.CHARACTER_SET, "UTF8");
        BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);
        MatrixToImageWriter.writeToStream(bitMatrix, "png", stream);
        return stream;
    } catch (Exception e) {
        log.error("create QR code error!", e);
        return null;
    } finally {
        if (stream != null) {
            stream.close();
        }
    }
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
/**二维码的生成*/
private void createQRCode(HttpServletResponse response){
	/**设置二维码的参数*/
	Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
	// 内容所使用编码
	hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
	// 留白区域大小
	hints.put(EncodeHintType.MARGIN, margin);
	try {
		BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE,width,height,hints);
		// 输出二维码
		MatrixToImageWriter.writeToStream(bitMatrix, format, response.getOutputStream());
	} catch (Exception e) {
		System.out.println("生成二维码异常！"+e.toString());
	}
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
/**
 * Method to get the JavaFX Image QR code for easy input of address
 * @param width width of the image
 * @param height height of the image
 * @return Java FX Image
 * @throws IOException Either when there is an encoding error or java's reserved memory is overwritten.
 * @throws WriterException When ZXING encounters an error.
 */
public Image getQR(int width, int height) throws IOException, WriterException{
    String charset = "UTF-8";
    Map hintMap = new HashMap();
    hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);

    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    BitMatrix matrix = new MultiFormatWriter().encode(new String(cryptoAddress.getBytes(charset), charset), BarcodeFormat.QR_CODE, width, height, hintMap);
    MatrixToImageWriter.writeToStream(matrix, "png", stream);
    stream.flush();

    byte[] data = stream.toByteArray();
    stream.close();

    return new Image(new ByteArrayInputStream(data));
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
/**条形码的生成*/
private void createBarCode(HttpServletResponse response){
	int codeWidth = 3 + // start guard
			(7 * 6) + // left bars
			5 + // middle guard
			(7 * 6) + // right bars
			3; // end guard
	codeWidth = Math.max(codeWidth, width);
	try {
		BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.CODE_128, codeWidth, height, null);
		// 条形码
		MatrixToImageWriter.writeToStream(bitMatrix, format, response.getOutputStream());
	} catch (Exception e) {
		System.out.println("生成条形码异常！"+e.toString());
	}
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
/**
 * Writes the image file to the output stream.
 *
 * @param graph    the object graph
 * @param exchange the camel exchange
 * @param stream   the output stream
 */
private void printImage(final Exchange exchange, final Object graph, final OutputStream stream) throws Exception {
    final String payload = ExchangeHelper
            .convertToMandatoryType(exchange, String.class, graph);
    final MultiFormatWriter writer = new MultiFormatWriter();

    // set values
    final String type = this.params.getType().toString();

    // create code image  
    final BitMatrix matrix = writer.encode(
            payload,
            this.params.getFormat(),
            this.params.getWidth(),
            this.params.getHeight(),
            writerHintMap);

    // write image back to stream
    MatrixToImageWriter.writeToStream(matrix, type, stream);
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
@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();
	}
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
@RequireAnyAuthority
@RequestMapping(value = "/qr", method = RequestMethod.GET)
public void qrcode(HttpServletResponse response,
		@AuthenticationPrincipal MongoUserDetails userDetails)
		throws WriterException, IOException {

	User user = userDetails.getUser(this.mongoDb);
	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();
	}
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
private void renderCode(H.Response response) {
    response.contentType("image/png");
    Map<EncodeHintType, Object> hints = new HashMap<>();
    hints.put(EncodeHintType.CHARACTER_SET, Act.appConfig().encoding());
    hints.put(EncodeHintType.MARGIN, 0);
    ErrorCorrectionLevel level = errorCorrectionLevel();
    if (null != level) {
        hints.put(EncodeHintType.ERROR_CORRECTION, level);
    }
    MultiFormatWriter writer = new MultiFormatWriter();
    try {
        BitMatrix bitMatrix = writer.encode(getMessage(), barcodeFormat(), width, height, hints);
        MatrixToImageWriter.writeToStream(bitMatrix, "png", response.outputStream());
    } catch (Exception e) {
        throw E.unexpected(e);
    }
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
@RequestMapping(value = "/qrcode/{username}.png", method = RequestMethod.GET)
public void qrcode(HttpServletResponse response,
		@PathVariable("username") String username)
		throws WriterException, IOException {

	User user = this.userRepository.findByUserName(username);
	if (user != null) {
		response.setContentType("image/png");
		String contents = "otpauth://totp/" + username + ":" + user.getEmail()
				+ "?secret=" + user.getSecret() + "&issuer=SpringSecurityTOTP";

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

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
public static void createQRCode(String barCodeData, String filePath, int height, int width)
            throws WriterException, IOException {
    BitMatrix matrix = new MultiFormatWriter().encode(barCodeData, BarcodeFormat.QR_CODE,
            width, height);
    try (FileOutputStream out = new FileOutputStream(filePath)) {
        MatrixToImageWriter.writeToStream(matrix, "png", out);
    }
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
private byte[] generateQrCodeForUri(String uri) {
	try {
		ByteArrayOutputStream stream = new ByteArrayOutputStream();
		BitMatrix matrix = new QRCodeWriter().encode(uri, BarcodeFormat.QR_CODE, 200, 200);
		MatrixToImageWriter.writeToStream(matrix, "PNG", stream);
		return stream.toByteArray();
	} catch (IOException | WriterException e) {
		// Given that this operation is entirely in memory, any such exceptions are indicative of bad input.
		throw new IllegalArgumentException("Invalid URI", e);
	}
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
private void doWrite(OutputStream os, Path path) throws IOException {
    try {
        Writer writer = new MultiFormatWriter();
        Map<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.CHARACTER_SET, StandardCharsets.UTF_8.name());
        hints.put(EncodeHintType.MARGIN, Integer.valueOf(margin));
        hints.put(EncodeHintType.ERROR_CORRECTION, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.forBits(errorCorrectionLevel.getBits()));
        BitMatrix matrix = writer.encode(uri.toUriString(), BarcodeFormat.QR_CODE, width, height, hints);
        if (os != null) {
            MatrixToImageWriter.writeToStream(matrix, imageFormatName, os);
        }
        else {
            MatrixToImageWriter.writeToPath(matrix, imageFormatName, path);
        }
    } catch (WriterException e) {
        throw new IOException(e);
    }
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
@Override
public Response getQRCode(final String url) throws IOException {

    final ByteArrayOutputStream buf = new ByteArrayOutputStream();
    final Writer writer = new QRCodeWriter();
    final BitMatrix matrix;
    try {
        matrix = writer.encode(url, BarcodeFormat.QR_CODE, 100, 100);
    } catch (WriterException e) {
        throw new ClapException(e);
    }
    MatrixToImageWriter.writeToStream(matrix, "PNG", buf);
    final byte[] bytes = buf.toByteArray();
    LOGGER.debug("qrcode for " + url + " generated");
    return returnImage(new ByteArrayInputStream(bytes), "qrcode.png");
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
/**
 * 生成二维码图片
 * @param content	二维码中包含的字符串信息
 * @param path		生成的二维码图片保存路径
 * @param length	生成的图片长宽
 * @param encodee_mode	编码方式
 * @throws WriterException 
 * @throws IOException 
 */
public static void encode(String content, String path, Integer length, String encodee_mode) throws WriterException, IOException {
	
	if (length == null) {
		
		length = 300;
	}
	
	Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
	hints.put(EncodeHintType.CHARACTER_SET, encodee_mode);
	hints.put(EncodeHintType.MARGIN, 1);
	BitMatrix matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, length, length, hints);
	//MatrixToImageWriter.writeToFile(matrix, "png", new File(path));
	MatrixToImageWriter.writeToStream(matrix, "png", new FileOutputStream(new File(path)));
}
 

import com.google.zxing.client.j2se.MatrixToImageWriter; //导入方法依赖的package包/类
public static byte[] createQRCode(String text) {
    try {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        Map<EncodeHintType, Object> hintMap = new EnumMap<>(EncodeHintType.class);
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        BitMatrix matrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, 200, 200, hintMap);
        MatrixToImageWriter.writeToStream(matrix, "png", baos);
        return baos.toByteArray();
    } catch (WriterException | IOException e) {
        throw new IllegalStateException(e);
    }
}