Map<String, String> paramsJson = new HashMap<String, String>();
paramsJson.put("grant_type", "client_credential");
paramsJson.put("appid", appid);
paramsJson.put("secret", appsecret);
WxAuth result = WxUtil.sendRequest(config.getAccessTokenCreateUrl(),
HttpMethod.GET, paramsJson, null, WxAuth.class);
result.setGrantType("client_credential");
result.setAppid(appid);
result.setSecret(appsecret);
return result;
}