11,判断token的值是否存在以及是否过期

  String token = (String) session.getAttribute("user_token");     //取出会话 数据
            if (token != null) {
                AliveModel aliveModel = tokenRedis.checkTokenActive(token);

---

/**
     * 判断 token 是否有效
     */
public AliveModel checkTokenActive(String token){
        // 先判断 key 是否存在
        boolean tokenIsExist = stringRedisTemplate.boundHashOps("roulette_alive").hasKey(token);

        //如果 key  存在 检查是否过期
        if(tokenIsExist){
 //检查当前key 有效时间
            String jsonActive = (String)stringRedisTemplate.opsForHash().get("roulette_alive", token);
            AliveModel aliveModel = JSON.parseObject(jsonActive, AliveModel.class);

          Date time = aliveModel.getTime();
            long aliveTime =  (new Date().getTime() - time.getTime())/1000;
            //超时时间
            if(aliveTime>15000){

             stringRedisTemplate.opsForHash().delete("roulette_alive",token);//超时删除redis
                return null;
            }
            return aliveModel;
  /* if(expire>0){
                String jsonActive = (String)stringRedisTemplate.opsForHash().get("roulette_alive", token);
                AliveModel aliveModel = JSON.parseObject(jsonActive, AliveModel.class);

 return aliveModel;
            }*/
        }
        return null;
    }