登录界面拦截器的使用、实现退出功能

登录界面拦截器的使用

public class LoginInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response, Object handler) throws Exception {
        String requestURI = request.getRequestURI();
        //放行静态资源，如img图片加载请求
        if(requestURI.startsWith("/static")) {
            return true;
        }
        //放行登录页面
        if("".equals(requestURI) || "/".equals(requestURI)) {
            return true;
        }
        //根据session判断是否已经登录
        HttpSession session = request.getSession();
        Employee employee = (Employee)session.getAttribute("current_employee");
        if(employee != null) {
            return true;
        }
        response.sendRedirect("/");
        return false;
    }

}

实现退出功能

@GetMapping("/logout")
public String logout(HttpSession session,RedirectAttributes redirectAttributes) {
        session.invalidate();
        redirectAttributes.addFlashAttribute("message","您已成功退出系统");
        return "redirect:/";
    }