Mam stronę internetową jsf, która pobiera niektóre zapytania z poprzednich stron.

moim problemem jest to, że strona główna ma zbuforowane wartości, bez zmian Nawet ja zmieniłam te wartości na null, to ma uzyskać zerową stronę, ale staje się coraz starsza.

więc moje pytanie brzmi: jak sprawić, by moja strona główna jsf była ładowana ponownie, a pamięć podręczna usuwana za każdym razem, gdy ją dzwonię, lub naciskam przycisk F?

Mój przykładowy kod JSF próbowałem:

     <h:head style="width: 200px; ">
    <f:facet name="first">
        <meta http-equiv="X-UA-Compatible" content="edge, chrome=1" />
        <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="-1" />
    </f:facet>

klasa java:

String SID = FacesContext.getCurrentInstance().getExternalContext()
        .getRequestParameterMap().get("SID");

String from = FacesContext.getCurrentInstance().getExternalContext()
        .getRequestParameterMap().get("from");

String to = FacesContext.getCurrentInstance().getExternalContext()
        .getRequestParameterMap().get("to");

String class_id = FacesContext.getCurrentInstance()
        .getExternalContext().getRequestParameterMap().get("class_id");


if (SID==null) {
    try {
        Dbconnection NewConnect = new Dbconnection();
        Connection con = NewConnect.MakeConnect();
        Statement stmt = con.createStatement();
        ResultSet rs = stmt
                .executeQuery("SELECT a.course_id, a.teacher_id, a.class_id, a.day_id, a.state, a.apssent_date, a.interval_id,s.student_id,s.first_name FROM student AS s INNER JOIN apsent AS a ON s.student_id = a.student_id where apssent_date between '"
                        + from
                        + "' and '"
                        + to
                        + "' and a.class_id = "
                        + Integer.parseInt(class_id));


        while (rs.next()) {

            ids.add(rs.getInt(8));
            names.add(rs.getString(9));
            intervals.add(rs.getInt(7));
            teachers.add(rs.getInt(2));
            dates.add(rs.getString(6));
            state.add(rs.getString(5));
        }

    } catch (Exception ex) {

        System.out.println(ex);
    }
}

System.out.println(SID + from + class_id + to);

if (class_id==null) {

    try {
        Dbconnection NewConnect = new Dbconnection();
        Connection con = NewConnect.MakeConnect();
        Statement stmt = con.createStatement();
        ResultSet rs = stmt
                .executeQuery("SELECT a.course_id, a.teacher_id, a.class_id, a.day_id, a.state, a.apssent_date, a.interval_id,s.student_id,s.first_name FROM student AS s INNER JOIN apsent AS a ON s.student_id = a.student_id where apssent_date between '"
                        + from
                        + "' and '"
                        + to
                        + "' and s.student_id = " + SID);

        while (rs.next()) {
            // System.out.println(rs.getInt(1));

            ids.add(rs.getInt(8));
            names.add(rs.getString(9));
            intervals.add(rs.getInt(7));
            teachers.add(rs.getInt(2));
            dates.add(rs.getString(6));
            state.add(rs.getString(5));
        }



    } catch (Exception ex) {

        System.out.println(ex);
    }

}

carsSmall = new ArrayList<Car>();
populateRandomCars(carsSmall, ids.size(), ids, names,
        intervals, teachers, dates, state);

}