使用Jedis连接Redis并操作HyperLogLog

import redis.clients.jedis.Jedis;

public class RedisHyperLogLogExample {
    public static void main(String[] args) {
        // 连接到本地的Redis服务
        Jedis jedis = new Jedis("localhost", 6379);

        String hyperLogLogKey = "hll_example";

        // 添加元素到HyperLogLog
        jedis.pfadd(hyperLogLogKey, "element1");
        jedis.pfadd(hyperLogLogKey, "element2");
        jedis.pfadd(hyperLogLogKey, "element3");
        jedis.pfadd(hyperLogLogKey, "element1"); // 重复的元素

        // 获取HyperLogLog的基数估计值
        long estimatedCardinality = jedis.pfcount(hyperLogLogKey);

        System.out.println("Estimated cardinality: " + estimatedCardinality);

        // 清理数据
        jedis.del(hyperLogLogKey);

        // 关闭Jedis连接
        jedis.close();
    }
}