GeezerVison

    private static com.github.binarywang.wxpay.service.WxPayService getWxPayService(WxPayConfig payConfig) {
        com.github.binarywang.wxpay.service.WxPayService wxPayService = new com.github.binarywang.wxpay.service.impl.WxPayServiceImpl() {
            @Override
            public String getV3(String url) throws WxPayException {
                HttpGet httpGet = new HttpGet(url);
                httpGet.addHeader("Accept", "application/json");
                httpGet.addHeader("Content-Type", "application/json");
                httpGet.addHeader("Wechatpay-Serial", getWechatpaySerial(this.getConfig()));
                return this.requestV3(url, httpGet);
            }

            private String getWechatpaySerial(WxPayConfig wxPayConfig) {
                if (StringUtils.isNotBlank(wxPayConfig.getPublicKeyId())) {
                    return wxPayConfig.getPublicKeyId();
                }
                return wxPayConfig.getVerifier().getValidCertificate().getSerialNumber().toString(16).toUpperCase();
            }
        };
        wxPayService.setConfig(payConfig);
        return wxPayService;
    }