Java web application MVC refactor from procedural to Object Oriented

Question

I have a controller servlet that will either call the service of Editing (adding/deleting appointments) the calendar or just Displaying it.

actionMap.put(null, new DisplayCalendarAction());
actionMap.put("display", new DisplayCalendarAction());
actionMap.put("modify", new EditCalendarAction());

DisplayCalendarAction and EditCalendarAction duplicate code. I realize I should move the duplicate code elsewhere and make it OO, but this is where I need help. I think it should go in the form class. BTW, I am not using STRUTS.

For the sake of learning and keeping it simple, I'll discuss only a subset of my refactoring, which deals with setting up a calendar to display in the view. The calendar view has a year and month selecter. Here is my current way.

public EditCalendarAction() { }
    public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {   
    // Get any request parameters
       int iYear = STKStringUtils.nullIntconv(request.getParameter("iYear"));
       int iMonth = STKStringUtils.nullIntconv(request.getParameter("iMonth"));

    // Get the current month and year
       Calendar ca = new GregorianCalendar();
       int curYear = ca.get(Calendar.YEAR);
       int iTMonth = ca.get(Calendar.MONTH);

    // If request parameters are null default to todays calendar
       if (iYear == 0) {
              iYear = curYear;
              iMonth = iTMonth;
       }

    // Create a calendar to get the number of days and the week start day   
       GregorianCalendar cal = new GregorianCalendar(iYear, iMonth, 1);
       int days = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
       int weekStartDay = cal.get(Calendar.DAY_OF_WEEK);

    //  Then create another calender just to get the total number of weeks
       cal = new GregorianCalendar(iYear, iMonth, days);
int iTotalweeks = cal.get(Calendar.WEEK_OF_MONTH);

then I pass the days weekStartDay and iTotalweeks to the view

request.setAttribute("iTotalweeks", iTotalweeks);
request.setAttribute("weekStartDay", weekStartDay);
request.setAttribute("days", days);

I use jstl forEach tags to generate a calendar based on these Attributes

Since both my EditCalendarAction and DisplayCalendarAction need to generate calendars, the code above is duplicated in both classes.

My attempt at refactoring is to have a method in a form class SchedulerCalendarForm that is called a setUpCalendar.

public EditCalendarAction() { }
    public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {   
        EventDAO eventDAO = new EventDAO();
        SchedulerCalendarForm calForm = new SchedulerCalendarForm(eventDAO);
        calForm.setUpCalendar(request);
        RequestDispatcher view = request.getRequestDispatcher("views/calendarEdit_v.jsp");
        request.setAttribute("form", calForm);
        view.forward(request, response);
}

But now how does my view know what the three values days weekStartDay and iTotalweeks that I had passed as attributes before? I'm passing the calForm to the view but the forEach does not work anymore

Should I instead make a three static procedures and call them to get the values and then pass as attributes?