import redis.clients.jedis.Jedis;
import redis.clients.jedis.ScanParams;
import redis.clients.jedis.ScanResult;

import java.util.ArrayList;
import java.util.List;

public class RedisKeyInfo {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("localhost", 6379);

        // 获取所有的key
        List<String> keys = getAllKeys(jedis);

        // 获取每个key的信息
        List<KeyInfo> keyInfos = getKeyInfos(jedis, keys);

        // 打印每个key的信息
        for (KeyInfo keyInfo : keyInfos) {
            System.out.println(keyInfo);
        }

        jedis.close();
    }

    // 获取所有的key
    private static List<String> getAllKeys(Jedis jedis) {
        List<String> keys = new ArrayList<>();
        String cursor = "0";
        ScanParams scanParams = new ScanParams().count(100);
        do {
            ScanResult<String> scanResult = jedis.scan(cursor, scanParams);
            keys.addAll(scanResult.getResult());
            cursor = scanResult.getStringCursor();
        } while (!cursor.equals("0"));
        return keys;
    }

    // 获取每个key的信息
    private static List<KeyInfo> getKeyInfos(Jedis jedis, List<String> keys) {
        List<KeyInfo> keyInfos = new ArrayList<>();
        for (String key : keys) {
            KeyInfo keyInfo = new KeyInfo();
            keyInfo.setKey(key);
            keyInfo.setType(jedis.type(key));
            keyInfo.setTtl(jedis.ttl(key));
            keyInfos.add(keyInfo);
        }
        return keyInfos;
    }

    // 封装key的信息
    private static class KeyInfo {
        private String key;
        private String type;
        private Long ttl;

        // getter和setter方法

        @Override
        public String toString() {
            return "KeyInfo{" +
                    "key='" + key + '\'' +
                    ", type='" + type + '\'' +
                    ", ttl=" + ttl +
                    '}';
        }
    }
}