SessionAttributes注解

@Controller
@SessionAttributes(value = { "id" })
publicclass StudentController {
    
    @RequestMapping(value = "/student/login.do")
    public String login(Map<String, Object> map) {
        map.put("id", "29ec591c-ecb5-430e-9f86-1ef8a0b3d611");
        return"result";
    }

}

@Controller
@SessionAttributes({"userInfo"})
publicclass UserInfoController {
    
    @RequestMapping("/userinfo/toView.do")
    public ModelAndView editView() {

        ModelAndView mv = new ModelAndView("to");
        UserInfo userInfo = new UserInfo();
        userInfo.setUserName("admin");
        userInfo.setPassword("123456");
        userInfo.setMobile("18838218972");
        userInfo.setAddress("河南省郑州市高新区升龙又一城");
        mv.addObject("userInfo", userInfo);
        returnmv;

    }

}