try {
  InputStream inStream = request.getInputStream();
  ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
  byte[] buffer = new byte[1024];
  int len = 0;
  while ((len = inStream.read(buffer)) != -1) {
    outSteam.write(buffer, 0, len);
  }
  outSteam.close();
  inStream.close();
  String result = new String(outSteam.toByteArray(), StandardCharsets.UTF_8);
  logger.info("微信投诉通知回调返回参数result：{}", result);
  CallBackBody callBackBody = JSONObject.parseObject(result, CallBackBody.class);
  String eventType = callBackBody.getEvent_type();
  ResourceBody resource = callBackBody.getResource();
  AesUtils aesUtil = new AesUtils(wechatApiV3.getBytes(StandardCharsets.UTF_8));
  String resourceStr = aesUtil.decryptToString(
    resource.getAssociated_data().getBytes(StandardCharsets.UTF_8),
    resource.getNonce().getBytes(StandardCharsets.UTF_8),
    resource.getCiphertext());
  logger.info("微信投诉通知回调返回参数resourceStr明文：{}", resourceStr);
  NotificationResult notificationResult = JSONObject.parseObject(resourceStr, NotificationResult.class);
  String complaintId = notificationResult.getComplaint_id();
  String actionType = notificationResult.getAction_type();
  logger.info("微信投诉通知回调返回参数complaintId：{}，actionType：{}", complaintId, actionType);
  // 验证微信支付返回签名
  String Wtimestamp = request.getHeader("Wechatpay-Timestamp");
  String Wnonce = request.getHeader("Wechatpay-Nonce");
  String Wsign = request.getHeader("Wechatpay-Signature");
  logger.info("Wtimestamp：{}，Wnonce：{}，Wsign：{}", Wtimestamp, Wnonce, Wsign);
  // 拼装待签名串
  StringBuffer ss = new StringBuffer();
  ss.append(Wtimestamp).append("\n");
  ss.append(Wnonce).append("\n");
  ss.append(result).append("\n");
  // 验证签名
  if (SignUtils.v3VerifyRSA(ss.toString(), Base64.decodeBase64(Wsign.getBytes()),
                            wechatPubKeyPath)) {
    logger.info("微信投诉通知回调签名验证成功");
    this.handleBusiness(complaintId, eventType, actionType, merchantBaseInfo);
    res.put("code", "SUCCESS");
    res.put("message", "OK");
  } else {
    logger.info("微信投诉通知回调签名验证失败");
    res.put("code", "ERROR_NAME");
    res.put("message", "VERIFY SIGN ERROR");
  }
} catch (GeneralSecurityException e) {
  e.printStackTrace();
  res.put("code", "ERROR_NAME");
  res.put("message", e.getMessage());
}