超时方法

public static Boolean timeOutIsLogin(Integer times,String ip, String userName, String userPwd) {
    Boolean obj = false;

    final ExecutorService exec = Executors.newFixedThreadPool(1);
    Callable<Boolean> call = new Callable<Boolean>() {
        public Boolean call() throws Exception {


            return  ShellUtil.isLogin( ip,  userName,  userPwd) ;
        }
    };
    //10秒后退出
    try {
        Future<Boolean> future = exec.submit(call);
        obj = future.get(times * 1500, TimeUnit.MILLISECONDS); // 任务处理超时时间设为10秒
         return obj;
    } catch (Exception e) {
      return false;
    }

}