springBoot学习笔记-12-登录拦截器

登录拦截器.

1、修改LoginController.

2、编写登录拦截器.

public class LoginHandlerInterceptor implements HandlerInterceptor{
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object loginUser = request.getSession().getAttribute("loginUser");
        if (loginUser == null){
            request.setAttribute("msg", "没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        }
        return true;
    }
}

3、在配置类中注册拦截器.

4、结果展示.