Spring MVC Session Attribute

Question

Hello I've got a problem with Session Attribute

I've 2 Controller Class

First Class (User)

@Controller
@RequestMapping("users")
@SessionAttributes("activeuser")
public class UserController {

    ....

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public String  loginUser(HttpServletRequest request,Model model, @ModelAttribute("userlogininfo") User loginuser,
            BindingResult result, SessionStatus status) {
        User activeuser = userService.checkuserlogin(loginuser.getUsername(), loginuser.getPassword());

        if (activeuser!=null) {
            request.getSession().setAttribute("activeuser", activeuser);
            return "redirect:/home";
        } else
            return "redirect:/index";


    }

Second Class(bank)

@Controller
@RequestMapping("banka")
@SessionAttributes("activeuser")
public class BankController {
....
    @RequestMapping(value = "/save", method = RequestMethod.POST)
    public String saveBanka(HttpServletRequest request, @ModelAttribute("banka") Banka banka, BindingResult result,
            SessionStatus status) {

        User user = (User) request.getSession().getAttribute("activeuser");

        banka.setUser(user);
        bankService.insert(banka);
        return "redirect:/home";
    }


}

Second Class is return null value from "(User) request.getSession().getAttribute("activeuser")"

Thanks in advance for your help.

Assuming if session is active when /save method is received by BankController, you should normally get the "activeuser" from session. To use the attributes defined in @SessionAttributes, try using public String saveBanka(...@ModelAttribute("activeuser") User user) and you should get the session attribute — Sahil Shaikh
– Sahil Shaikh, Commented Jul 13, 2017 at 20:55

fg78nc · Accepted Answer · 2017-07-13 21:28:56Z

1

Add your attribute to model (instead of request.getSession().setAttribute("activeuser", activeuser);)

model.addAttribute("activeuser", activeuser);

Make sure activeuser is Serializable.

edited Jul 13, 2017 at 21:28

answered Jul 13, 2017 at 20:17

fg78nc

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5 Comments

tsolakp Over a year ago

The OP is using session and not the request.

Sahil Shaikh Over a year ago

I believe the redirect: prefix will generate a 302 redirect http response and session will be created, so getting the session attribute into the redirected handler must get the session attribute.

fg78nc Over a year ago

@tsolakp He is obtaining session from request request.getSession().setAttribute("activeuser", activeuser); Request is dead after redirect, does not survive.

tsolakp Over a year ago

Does not matter different request can give the same session. That's the point of the session: to be the same in between requests (either with forward or redirect).

fg78nc Over a year ago

That would be true if he obtains it direct from HttpSession.

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