Temporary ban of google search by Google (HttpStatusException: HTTP error fetching URL. Status=503 )

Question

For my code ,it aims to retrieve every google search results in that specific date range . It works once .And later I re-run again .It fails .And I have received the error before .

Exception in thread "main" org.jsoup.HttpStatusException: HTTP error fetching URL. Status=403, URL=http://ipv4.google.com/sorry/index?continue=http://www.google.com/search%253Fq%253Dstackoverflow%2526tbm%253Dnws%2526tbs%253Dcdr%2525253A1%2525252Ccd_min%2525253A5%2525252F30%2525252F2016%2525252Ccd_max%2525253A6%2525252F30%2525252F2016%2526start%253D0&q=EgTKLTckGKH5hsQFIhkA8aeDS-3IYZmr41q-m4rIMh7Uw7vC3wdLMgNyY24 at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:679) at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:676) at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:628) at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:260) at org.jsoup.helper.HttpConnection.get(HttpConnection.java:249) at javaapplication3.JavaApplication3.main(JavaApplication3.java:36)

By referencing org.jsoup.HttpStatusException: HTTP error fetching URL. Status=503 (google scholar ban?) & Using Jsoup to access HTML but receives error code 503

I guess the crawling is too fast so it causes the Google temporary ban. Hence ,I set this . .ignoreHttpErrors(true).followRedirects(true).timeout(100000).ignoreContentType(true).get();

However ,it is still not working .

Full code:`

public static void main(String[] args) throws UnsupportedEncodingException, IOException {

        String google = "http://www.google.com/search?q=";

        String search = "stackoverflow daterange:2016-01-01..2016-12-31 ";

   //+"&tbs=cdr%3A1%2Ccd_min%3A1%2F1%2F2016%2Ccd_max%3A12%2F31%2F2016"
      //  daterange:2457389-2457735

        String charset = "UTF-8";

        String news="&tbm=nws";

          String string = google + URLEncoder.encode(search , charset) + news;

       // String userAgent = "ExampleBot 1.0 (+http://example.com/bot)"; // Change this to your company's name and bot homepage!
     String userAgent ="Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36";
        int pages =0;


for(int j=0;j<50;j++){
    //   Document document = Jsoup.connect(string+"&start="+(j+0)*10).userAgent(userAgent).get(); <<-- original method 
        Document document = Jsoup.connect(string+"&start="+(j+0)*10).userAgent(userAgent). ignoreHttpErrors(true).followRedirects(true).timeout(100000).ignoreContentType(true).get();  //<<-- modified method
    Elements links = document.select( ".r>a");

     int numberOfResultpages = 1; 

  System.out.println("\n"); System.out.println(j);
   for(int i=0;i<numberOfResultpages ;i++) {

     for (Element link : links) {
            String title = link.text();
            String url = link.absUrl("href"); // Google returns URLs in format "http://www.google.com/url?q=<url>&sa=U&ei=<someKey>".
            url = URLDecoder.decode(url.substring(url.indexOf('=') + 1, url.indexOf('&')), "UTF-8");

            if (!url.startsWith("http")) {
                continue; // Ads/news/etc.
            }

            System.out.println("Title: " + title);
            System.out.println("URL: " + url);
        }
    }

}
  }`