怎么将数据存入session

忘是亡心i 2024-04-01 09:42 56阅读 0赞

怎么将数据存入session  
默认数据都是存入request ,需要自己设置存入session 。

1.方式1 原生session代码

@RequestMapping("/selectUser")
    public String  selectUser(HttpServletRequest request)
    {
        User user=new User("zhangsan","123",23,new Address("湖北","武汉","汉口大道100号"));
    
        HttpSession session= request.getSession();
    
        session.setAttribute("sessionuser",user);
    
        return "showUser4";
    }

测试取值:

${sessionScope.sessionuser.uname}

2.通过注解的方式  
2.1先将值存入model

@Controller
    
    //@SessionAttributes(value="sessionuser2")
    @RequestMapping("/user4")
    public class UserController4 {
    
     
    
        @RequestMapping("/selectUser2")
        public ModelAndView selectUser2()
        {
            User user=new User("zhangsan2","123",23,new Address("湖北","武汉","汉口大道100号"));
    
            User user2=new User("zhangsan22","123",23,new Address("湖北","武汉","汉口大道100号"));
    
    
            ModelAndView modelAndView=new ModelAndView();
    
            modelAndView.addObject("sessionuser2",user);
    
            modelAndView.addObject("user2",user2);
    
            modelAndView.setViewName("showUser5");
    
    
            return modelAndView;
    
        }
    }

2.2在 类上加入注解

@SessionAttributes("存入model中的key")
    
    @Controller
    // 通过注解的方式将数据存入session
    @SessionAttributes("sessionuser2")
    //@SessionAttributes(value="sessionuser2")
    @RequestMapping("/user4")
    public class UserController4 {
    
     
    
        @RequestMapping("/selectUser2")
        public ModelAndView selectUser2()
        {
            User user=new User("zhangsan2","123",23,new Address("湖北","武汉","汉口大道100号"));
    
            User user2=new User("zhangsan22","123",23,new Address("湖北","武汉","汉口大道100号"));
    
    
            ModelAndView modelAndView=new ModelAndView();
    
            modelAndView.addObject("sessionuser2",user);
    
            modelAndView.addObject("user2",user2);
    
            modelAndView.setViewName("showUser5");
    
    
            return modelAndView;
    
        }
    }