import java.util.ArrayList;
import java.util.StringTokenizer;
public class Parser {

    private String str; // stringa da parsare

    public Parser(String str) {
        this.str = str;
    }

    public static ArrayList generaLink(String str) {

        ArrayList<String> arrayString = new ArrayList();
        ArrayList<String> arrayLink = new ArrayList();

        StringTokenizer sToken = new StringTokenizer(str);

        while (sToken.hasMoreTokens()) {
            if (sToken.nextToken().equals("<div"))
                if (sToken.nextToken().equals("class=\"views-field"))
                    if(sToken.nextToken().equals("views-field-title\">"))
                        if (sToken.nextToken().equals("<h6"))
                            if(sToken.nextToken().equals("class=\"field-content\"><a"))
                                arrayString.add(sToken.nextToken());
        }

        for (int i=0; i<arrayString.size(); i++) {
            String x = arrayString.get(i);
            StringTokenizer stx = new StringTokenizer(x,"\" ");
            String link = "http://web.dmi.unict.it";

            while (stx.hasMoreTokens())
                if(stx.nextToken().equals("href="))
                    arrayLink.add(link+stx.nextToken());
        }

        return arrayLink;
    }

}





import java.io.File;
import java.text.DateFormat;
import java.util.StringTokenizer;
import org.jsoup.*;
import org.jsoup.nodes.Document;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
public class ParserAvvisi_DMIUNICT {
    static String pathData = "..\\..\\data";
    // C:\Users\Pierpaolo\Documents\NetBeansProjects\ParserAvvisi_DMIUNICT\data
    public static void main(String[] args) throws InterruptedException {

        Document doc;
        Parser parser;
        File file;
        while (true) {

            // Gestione calendario + estrapolazione link
            Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("Europe/Rome"),Locale.ITALY);
            Date today = calendar.getTime();
            DateFormat dateFormat =DateFormat.getDateInstance(DateFormat.SHORT, Locale.ITALY);
            String data = dateFormat.format(today); // 16/10/17
            String mese = data.substring(3,5); // 10
            String anno = data.substring(6,8); // 17
            String inLink = "20"+anno+mese;


            // Gestione file
            if (true);




            // Gestione estrapolazione documento HTML
            doc = new Document ("");
            try {
                doc = Jsoup.connect("http://web.dmi.unict.it/Didattica/Laurea%20Triennale%20in%20Informatica%20L-31/Avvisi/Archivio%20Avvisi/"+inLink).get();
            } catch(Exception e) {
                e.printStackTrace();
            }
            String stringa = doc.toString();

            // Parsing + Estrapolazione link
            parser = new Parser(stringa);
            ArrayList<String> link = Parser.generaLink(stringa);
            System.out.println(link.toString());
            Thread.sleep(5000);
        }

    }
}