写入拦截器后不断地重定向到登录页面问题解决

拦截器

public class LoginInterceptor extends HandlerInterceptorAdapter {
    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler) throws Exception {
        if (request.getSession().getAttribute("user") == null) {
            response.sendRedirect("/admin");
            return false;
        }
        return true;
    }
}`

@PostMapping("/login")
    public String login(@RequestParam String username,
                        @RequestParam String password,
                        HttpSession session,
                        RedirectAttributes redirectAttributes){
        User user = userService.checkUser(username, password);
        if (user!=null){
            user.setPassword(null);
            session.setAttribute("User",user);
            return "admin/index";
        }else {
            redirectAttributes.addFlashAttribute("message","您的用户名或者密码有错误奥！请仔细检查~~");
            return "redirect:/admin";
        }

    }

`原因是session设置属性的时候，User和user大小写不一样，因此会不断地返回login登录页面