java 微信获取accessToken

public static AccessToken getAccessToken(String appid, String appsecret){    AccessToken accessToken = null;    String requestUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET".replace("APPID", appid).replace("APPSECRET", appsecret);    JSONObject jsonObject = httpRequest(requestUrl, "GET", null);    if (jsonObject != null) {      try {        accessToken = new AccessToken();        accessToken.setToken(jsonObject.getString("access_token"));        accessToken.setExpiresIn(jsonObject.getInt("expires_in"));      } catch (JSONException e) {        accessToken = null;        logger.error("获取token失败 errcode:{} errmsg:{}"+Integer.valueOf(jsonObject.getInt("errcode"))+ jsonObject.getString("errmsg"));      }    }    return accessToken;  }