Spring MVC會話屬性

Question

您好，我對會話屬性有疑問

我有2個控制器班

頭等艙（用戶）

@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";


    }

二等（銀行）

@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";
    }


}

第二類是從“（用戶）request.getSession（）。getAttribute（“ activeuser”）“返回的空值

在此先感謝您的幫助。

Answer 1

將您的屬性添加到模型中（而不是request.getSession().setAttribute("activeuser", activeuser); ）

model.addAttribute("activeuser", activeuser);

確保activeuser是可序列化的。