maven
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.0</version>
</dependency>
生成二维码
public static void generateQrCode(OutputStream out,String content, int width, int height, String format) throws WriterException, IOException {
//format="png"
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
// 设置QR二维码的纠错级别（H为最高级别）具体级别信息
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 内容所使用编码
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
// 设置图片的边距
hints.put(EncodeHintType.MARGIN,1);
// 生成矩阵
BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
BarcodeFormat.QR_CODE, width, height, hints);
// 输出图像
MatrixToImageWriter.writeToStream(bitMatrix,format,out);
}
识别二维码
public static Result decodeQrCode(InputStream inputStream) throws IOException, NotFoundException {
BufferedImage image = ImageIO.read(inputStream);
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码
return result;
}
doc
