微信公众号获取openId(微信小程序)

//微信小程序 微信公众号获取openId
public static String getUserOpenId(String accessToken){
String result = null;
String requestUrl ="https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN";
requestUrl = requestUrl.replace("ACCESS_TOKEN", accessToken);
JSONObject jsonObject = WeixinUtil.httpRequest(requestUrl, "GET", null);
if(null != jsonObject){
System.out.println(jsonObject);
System.out.println(jsonObject.get("total"));
System.out.println(jsonObject.get("data"));
result = jsonObject.get("data")+"";
}
return result;
}