Spring Framework 3 and session attributes

Question

I have form object that I set to request in GET request handler in my Spring controller. First time user enters to page, a new form object should be made and set to request.

Answer 1

@Controller
@SessionAttributes("goal")
public class GoalController {

    @RequestMapping(value = "/addGoal", method = RequestMethod.GET)
    public String addGoal(Model model) {
        model.addAttribute("goal", new Goal(11));
        return "addGoal";
    }

    @RequestMapping(value = "/addGoal", method = RequestMethod.POST)
    public String addGoalMinutes(@ModelAttribute("goal") Goal goal) {
        System.out.println("goal minutes " + goal.getMinutes());
        return "addMinutes";
    }
}

On page addGoal.jsp user enters any amount and submits page. Posted amount is stored in HTTP Session because of

@ModelAttribute("goal") Goal goal

and

@SessionAttributes("goal")

Without @ModelAttribute("goal") amount entered by user on addGoal page would be lost