springMVC拦截器未登录用户

配置拦截器（未登录则去登录）

public class LoginInterceptor implements HandlerInterceptor {      public boolean preHandle(HttpServletRequest request,             HttpServletResponse response, Object handler) throws Exception {         TsPtlUser user = (TsPtlUser) request.getSession().getAttribute("user");         //未登录，则去登录         if(user == null){             String path = request.getContextPath();             response.sendRedirect(path+"/user/toLogin.do");             return false;         }else{             return true;         }              }    

springMVC配置文件配置拦截

<mvc:interceptors>         <mvc:interceptor>         //拦截器类拦截/user/login/下的请求             <mvc:mapping path="/user/login/**"/>             <bean class="com.rl.ecps.interceptor.LoginInterceptor"></bean>         </mvc:interceptor>     </mvc:interceptors>    

原文：https://www.cnblogs.com/ljllove/p/9216080.html