/**
 * 支付通知
 * @return
 * @throws IOException
 */
@PostMapping("payAccept")
public void payAccept() throws IOException {
    log.info("接收到支付通知1111111111");
    Map<String, String> response;
    try {
        log.info("接收到支付通知2222222222222222");

        String requestStr = HttpsUtil.parseRequst(HttpsUtil.request());

            log.debug("回调参数 ： " + requestStr);

            response = HttpsUtil.toMap(requestStr.getBytes(), "UTF-8");
        if ("SUCCESS".equals(response.get("return_code"))) {
            log.debug("***支付成功回调参数：** " + response);

            // 支付通知内容做签名验证校验,防止被第三方篡改
            SortedMap<Object, Object> parameters = new TreeMap<Object, Object>();
            parameters.putAll(response);
            String appid = response.get("appid");
            parameters.put("key", PayConfig.key);
            String signCheck = WeixinUtil.createSign("UTF-8", parameters);
            // 签名验证不通过 签名验证不通过，非法签名
            if (!signCheck.equals(response.get("sign"))) {
                return;
            }

            if ("SUCCESS".equals(response.get("result_code"))) {
                log.debug("***支付成功回调参数222222：** ");

            }else {
            // 支付失败

                // 通知微信，收到消息通知，不要在重复发送通知信息
            HttpsUtil.response().getWriter().write(WeixinUtil.SUCCESS);
            }
            HttpsUtil.response().getWriter().write(WeixinUtil.SUCCESS);
            return;
        }
    } catch (Exception e) {
        e.printStackTrace();
        log.error("发送通知异常:"+e.toString());
    }


}
public static  HttpServletRequest request() {
    HttpServletRequest request = (HttpServletRequest) currentRequest.get();

    logger.debug("Request parameters:");
    Enumeration<String> parameterNames = request.getParameterNames();
    while (parameterNames.hasMoreElements()) {
        String paramName = parameterNames.nextElement();
        String paramValue = request.getParameter(paramName);
        logger.debug("请求参数request:"+paramName + ": " + paramValue);
    }
    return request;
}

HttpsUtil.request()没有接收到任何参数，运行到log.info("接收到支付通知2222222222222222");就报空指针了。