5，jedis连接池

 JedisPoolConfig conf = new JedisPoolConfig();        conf.setMaxWaitMillis(3000);        conf.setFairness(false);        conf.setMaxIdle(5);        conf.setMaxTotal(10);        JedisPool jedisPool = new JedisPool(conf, "hadoop1", 6379, 100, "xxx");        int numActive = jedisPool.getNumActive();        System.out.println("numActive :" + numActive);        Jedis jedis = jedisPool.getResource();        jedis.select(0);        String value = jedis.get("k1");        System.out.println(value);        jedisPool.close();