首先在springmvc中配置拦截器
<!-- 配置拦截器 --><mvc:interceptors><mvc:interceptor><!-- 拦截所有mvc控制器 --><mvc:mapping path="/**"/><!-- mvc:exclude-mapping是另外一种拦截，它可以在你后来的测试中对某个页面进行不拦截，这样就不用在LoginInterceptor的preHandler方法里面获取不拦截的请求uri地址了(优选) --><mvc:exclude-mapping path="/admin/loginPage.action" /><mvc:exclude-mapping path="/admin/varifyCode.action" /><bean class="nyist.admin.utils.LoginInterceptor"></bean></mvc:interceptor></mvc:interceptors>
然后写拦截器：
public class LoginInterceptor implements HandlerInterceptor {@Overridepublic void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)throws Exception {// TODO Auto-generated method stub}@Overridepublic void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)throws Exception {// TODO Auto-generated method stub}@Overridepublic boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {HttpSession session = arg0.getSession();//String uri = request.getRequestURI(); // 获取登录的uri，这个是不进行拦截的//if(session.getAttribute("LOGIN_USER")!=null || uri.indexOf("system/login")!=-1) {// 说明登录成功 或者 执行登录功能 if(session.getAttribute("admin")!=null) {// 登录成功不拦截return true;}else {// 拦截后进入登录页面arg1.sendRedirect(arg0.getContextPath()+"/admin/loginPage.action");return false;}}
}
拦截器这样就设置好了
