spring annotation 不是单例的写法

在多用户管理中想把每个用户的信息都保存在session中，其中保存用户信息的bean想用spring管理，则必须不是单例

@Controller
@Scope("prototype")
public class LoginController {

    @Autowired
    private LoginService loginService;
   
    @Resource
    private UserContext userContext;

    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login() {
        return "login";

    }

    @RequestMapping(value = "/login", method = RequestMethod.POST)
    public ModelAndView loginCheck(User user,HttpServletRequest request) {
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("login");
        User userInfo = loginService.getUser(user);
        if (null != userInfo) {
    //        UserContext userContext = new UserContext();
            userContext.init(userInfo);
            request.getSession().setAttribute("user", userContext);
            if(userInfo.getId() !=1) {
                modelAndView.setViewName("redirect:/matches");               
            }else {
                modelAndView.setViewName("redirect:/home");
            }

        } else {
            modelAndView.addObject("user",user);
            modelAndView.addObject("msg", "Invalid account or password.");
        }
        return modelAndView;

    }

-------------

@Service
@Scope("prototype")
public class UserContext {
    private List<Menu> menuList = null;
    private User user = null;
   

    private ContentOwnerContext currentContentOwner;
   

 

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Scope prototype means that every time you ask spring (getBean or dependency injection) for an instance it will create a new instance and give a reference to that.

注意想得到prototype的UserContextze则必须在controller也加上@Scope，否则还是单例，因为Controller还是单例。