关于拦截器登录的问题在拦截器里获取不到session

Question

controller

 @RequestMapping(value = "loginIn", method = RequestMethod.POST)
    public ResultModel loginIn(@RequestBody UserDTO user, HttpServletRequest request, HttpServletResponse response)
    {
        TransResult transResult =  userService.loginIn(user);
        if(transResult.isSuccess())
        {
            HttpSession session = getRequest().getSession();
            session.setAttribute("name",user.getUsername());
            session.setAttribute("id",user.getPassword());
            return this.resultResponseSuccess(new ContentModel(transResult.getObject()));
        }else{
            return this.resultResponseFault(new ContentModel(transResult.getObject()));
        }
    }
    @RequestMapping(value = "register", method = RequestMethod.POST)
    public ResultModel register(@RequestBody UserDTO user,HttpServletRequest request, HttpServletResponse response)
    {
        TransResult transResult =  userService.register(user);
        if(transResult.isSuccess())
        {

            return this.resultResponseSuccess(new ContentModel(transResult.getObject()));
        }else{
            return this.resultResponseFault(new ContentModel(transResult.getResultInfoDesc()));
        }
    }

拦截器

@Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object id = request.getSession().getAttribute("id");//这里的值为空
        if(id!=null)
        {
            return true;
        }
        System.out.println("已拦截");
        return false;
    }

配置

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //跨域拦截
        registry.addInterceptor(allowCrossDomainInterceptor)
                .addPathPatterns("/**/register");
        super.addInterceptors(registry);
    }

现在就是登录完之后获取不到session

Answer 1

兄弟 是先通过filter再到Servlet的。第一次登录时，filter里判断的session肯定是空。因为Servlet里还没存session；第二次登录时（不关浏览器），才有了上一次的session