/**
 * 微信获取OPENID
 */
private static String WX_AUTHORIZATION_CODE_URL = "https://api.weixin.qq.com/sns/oauth2/access_token"
        + "?appid=%s&secret=%s&code=%s&grant_type=authorization_code";
String url = String.format(WX_AUTHORIZATION_CODE_URL, wxConfig.getAppid(), wxConfig.getSecret(), req.getCode());
String result = HttpUtil.get(url);
globalOpenId = JSONUtil.parseObj(result).getStr("openid");