Java と Redis を使用してリアルタイム リーダーボードを構築する: スコアをすばやく計算する方法

public double calculateScore(double score, double weight, double activity) {
    // 分数计算公式：得分 * 权重 + 活跃度
    return score * weight + activity;
}

import redis.clients.jedis.Jedis;
import redis.clients.jedis.Tuple;

import java.util.Set;

public class RealtimeLeaderboard {
    // Redis服务器地址
    private static final String REDIS_HOST = "localhost";
    // Redis端口号
    private static final int REDIS_PORT = 6379;
    // Redis密码
    private static final String REDIS_PASSWORD = "your_password";
    // Redis数据库索引
    private static final int REDIS_DATABASE = 0;

    private final Jedis jedis;

    public RealtimeLeaderboard() {
        jedis = new Jedis(REDIS_HOST, REDIS_PORT);
        jedis.auth(REDIS_PASSWORD);
        jedis.select(REDIS_DATABASE);
    }

    public void updateScore(String userId, double score, double weight, double activity) {
        // 更新用户得分
        jedis.zadd("leaderboard", calculateScore(score, weight, activity), userId);
    }

    public void getLeaderboard() {
        // 获取排行榜
        Set<Tuple> leaderboard = jedis.zrevrangeWithScores("leaderboard", 0, 10);
        // 输出排行榜信息
        for (Tuple tuple : leaderboard) {
            System.out.println("User: " + tuple.getElement() + ", Score: " + tuple.getScore());
        }
    }

    public static void main(String[] args) {
        RealtimeLeaderboard leaderboard = new RealtimeLeaderboard();
        // 更新用户得分
        leaderboard.updateScore("user1", 100, 0.5, 10);
        leaderboard.updateScore("user2", 150, 0.7, 5);
        leaderboard.updateScore("user3", 200, 0.8, 8);
        // 获取排行榜
        leaderboard.getLeaderboard();
    }
}