code: public static void showQrCode(File qrCode, boolean terminal) throws WriterException {
          if (!terminal) {
              String os = System.getProperty("os.name").toLowerCase();
              try {
                  if (os.contains("mac") || os.contains("win")) {
                      Desktop.getDesktop().open(qrCode);
                      return;
                  }
              } catch (Exception e) {
                  log.warn("在 {} 下打开文件 {} 失败", os, qrCode.getPath(), e);
              }
          }
          Map<EncodeHintType, Object> hintMap = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
          hintMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");
          // Now with zxing version 3.2.1 you could change border size (white border size to just 1)
          // default = 4
          hintMap.put(EncodeHintType.MARGIN, 1);
          hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
  
          String       qrContent    = QRCodeUtils.readQRCode(qrCode, hintMap);
          QRCodeWriter qrCodeWriter = new QRCodeWriter();
          BitMatrix    bitMatrix;
          bitMatrix = qrCodeWriter.encode(qrContent, BarcodeFormat.QR_CODE, 10, 10, hintMap);
          System.out.println(toAscii(bitMatrix));
      }
docs: 显示二维码，Linux会显示在终端
  
  @param qrCode
  @param terminal