public static boolean sendGetRequest(String path,Map<String,String> params,String enc) throws Exception{
  StringBuilder sb=new StringBuilder();
  sb.append('?');
  //?method=save&title=r&timelength=2
  for(Map.Entry<String, String> entry:params.entrySet()){
  sb.append(entry.getKey()).append('=').append(URLEncoder.encode(entry.getValue(),enc)).append('&');
  }
  sb.deleteCharAt(sb.length()-1);
  URL url=new URL(sb.toString());
  HttpURLConnection conn=(HttpURLConnection)url.openConnection();
  conn.setRequestMethod("GET");
  conn.setConnectTimeout(5*1000);
  if(conn.getResponseCode()==200){
  return true;
  }
  return false;
}