JAVA 生成二维码图片和解析二维码图片内容代码实例

System.out.println("解析内容为： " + content);

} catch (Exception e) {

e.printStackTrace();

}

}

/**

• 生成二维码图片

• @param text

• @return

*/

public static String generateQRCode(String text) throws Exception {

return generateQRCode(text, 300, 300, "jpg", qrCodeSavePath + SmartBeanUtil.genUUID() + ".jpg");

}

/**

• 解析指定路径下的二维码图片

• @param filePath

• @return

*/

private static String parseQRCode(String filePath) {

String content = "";

try {

File file = new File(filePath);

BufferedImage image = ImageIO.read(file);

LuminanceSource source = new BufferedImageLuminanceSource(image);

Binarizer binarizer = new HybridBinarizer(source);

BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);

Map<DecodeHintType, Object> hints = new HashMap<>();

hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");

MultiFormatReader formatReader = new MultiFormatReader();

Result result = formatReader.decode(binaryBitmap, hints);

//设置返回值

content = result.getText();

} catch (Exception e) {

e.printStackTrace();

}

return content;

}

/**

• 根据内容，生成指定宽高、指定格式的二维码图片

• @param text 内容

• @param width 宽

• @param height 高

• @param format 图片格式

• @return 生成的二维码图片路径

• @throws Exception

*/

public static String generateQRCode(String text, int width, int height, String format, String pathName) throws Exception {

Hashtable<EncodeHintType, Object> hints = new Hashtable<>();

hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

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File outputFile = new File(pathName);

if (!outputFile.exists()) {

outputFile.mkdirs();

}

writeToFile(bitMatrix, format, outputFile);

return pathName;

}

//输出为文件

public static void writeToFile(BitMatrix matrix, String format, File file)

throws IOException {

BufferedImage image = toBufferedImage(matrix);

if (!ImageIO.write(image, format, file)) {

throw new IOException("文件写入异常");

}

}

//输出为流

public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)

throws IOException {

BufferedImage image = toBufferedImage(matrix);

if (!ImageIO.write(image, format, stream)) {

throw new IOException("文件写入异常");

}

}

//缓冲图片

public static BufferedImage toBufferedImage(BitMatrix matrix) {

int width = matrix.getWidth();

int height = matrix.getHeight();

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

for (int x = 0; x < width; x++) {

for (int y = 0; y < height; y++) {

image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);

}