Jedis操作

显然，经过故障转移后，主从结构已经发生了改变且主已经死亡，如果还按照之前那样写死IP的方式连接Redis的话，势必会出现错误。可以想到，在Sentinel结构下，你必须向哨兵询问来获取谁是Master。

    private static final JedisSentinelPool pool;
    static {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        jedisPoolConfig.setMaxTotal(10);
        jedisPoolConfig.setMaxIdle(5);
        jedisPoolConfig.setMinIdle(5);

        Set sentinels = new HashSet<>(Arrays.asList(
                "111.111.111.111:26379",
                "111.111.111.112:26379",
                "111.111.111.113:26379"
        ));
        GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
        poolConfig.setMaxTotal(10);
        poolConfig.setMaxIdle(5);
        poolConfig.setMinIdle(5);
        pool = new JedisSentinelPool("yewu01", sentinels, jedisPoolConfig);
    }

    public static void main(String[] args) throws Exception {
        String key1 = "key1";
        try (Jedis jedis = pool.getResource()) {
            jedis.set(key1, "222");
            System.out.println(jedis.get(key1));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }