基于google zxing的Java二维码生成与解码

<!-- google二维码工具 --><dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.1.0</version></dependency><!-- 文件上传 --><dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version></dependency><dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version></dependency>

/** * 生成二维码 * google zxing 实现 * @param text * @return */@RequestMapping(value = "/qrcode/encode", method = RequestMethod.POST)public void encodeQrCode(String text, HttpServletResponse response) {  try {   // 设置二维码参数   Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();   hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");   BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, 150, 150, hints);   //返回二维码   MatrixToImageWriter.writeToStream(bitMatrix, "jpg", response.getOutputStream());  } catch (Exception e) {   e.printStackTrace();  }}

/** * 二维码图片解码 * google zxing 实现 * @param qrImg * @return */@RequestMapping(value = "/qrcode/decode", method = RequestMethod.POST)public String decodeQrCode(MultipartFile qrImg) {  if (!qrImg.isEmpty()) {   try {     BufferedImage image = ImageIO.read(qrImg.getInputStream());     BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));     // 定义二维码的参数:     HashMap<DecodeHintType, Object> hints = new HashMap<>();     // 定义字符集     hints.put(DecodeHintType.CHARACTER_SET, "utf-8");     Result result = new MultiFormatReader().decode(binaryBitmap, hints);     return result.getText();   } catch (Exception e) {     e.printStackTrace();   }  }  return null;}