Springmvc用户注销退出登录功能疑问

Springmvc框架用户登录后记录到Session中

@Controller
@RequestMapping({ "/user" })
@SessionAttributes({ GlobalConstants.USER_SESSION })
public class UserController {
	@Autowired
	private UserService userService;

	@ResponseBody
	@RequestMapping("/login")
	public String login(ModelMap model, String email, String password) {
		User user = userService.findUserByEmail(email);
	
				SessionStruct session = new SessionStruct();
				session.setUser(user);
				model.addAttribute(GlobalConstants.USER_SESSION, session);
				return "";
	
	}
	
	@RequestMapping(value = "/loginout", method = RequestMethod.GET)
	public String loginOut(HttpServletRequest request,@ModelAttribute(GlobalConstants.USER_SESSION) SessionStruct session) {
		// 清除session
		Enumeration<String> em = request.getSession().getAttributeNames();
		while (em.hasMoreElements()) {
			request.getSession().removeAttribute(em.nextElement().toString());
		}
		request.getSession().removeAttribute(GlobalConstants.USER_SESSION);
		request.getSession().invalidate();
		String path = request.getContextPath();
		// 拼接跳转页面路径
		String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
		System.out.println(request.getSession().getAttribute(GlobalConstants.USER_SESSION));
		return "redirect:" + basePath;
	}
	


}

我的和牛哥的不同之处可能是session是通过注解注入的，牛哥的应该是通过request拿的吧？

    <li >欢迎 <c:out value="${sessionScope.USER_SESSION.user.username }"></c:out></li>

清楚之后username依然能够在页面显示。。。