Redis自增生成id的方法实践

Jedis jedis = new Jedis("localhost", 6379);

jedis.set("orderId", "1");

long orderId = jedis.incr("orderId");

jedis.close();

import redis.clients.jedis.Jedis;
public class RedisAutoIncrement {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("localhost", 6379);
        // 设置初始值
        jedis.set("orderId", "1");
        // 获取自增 ID
        long orderId = jedis.incr("orderId");
        // 输出结果
        System.out.println("orderId: " + orderId);
        jedis.close();
    }
}

local key = KEYS[1]
local step = tonumber(ARGV[1])
local id = redis.call('INCRBY', key, step)
return id

String script = "local key = KEYS[1]\n" +
                "local step = tonumber(ARGV[1])\n" +
                "local id = redis.call('INCRBY', key, step)\n" +
                "return id";
List<String> keys = new ArrayList<>();
keys.add("orderId");
List<String> args = new ArrayList<>();
args.add("1");
Object result = jedis.eval(script, keys, args);
long orderId = Long.parseLong(result.toString());

jedis.setex("orderId", 3600, "1");

import redis.clients.jedis.Jedis;
public class RedisAutoIncrement {
    private Jedis jedis;
    private String key;
    public RedisAutoIncrement(String host, int port, String key) {
        this.jedis = new Jedis(host, port);
        this.key = key;
        // 设置初始值
        this.jedis.setnx(this.key, "0");
    }
    public long generateId() {
        return this.jedis.incr(this.key);
    }
    public void close() {
        this.jedis.close();
    }
}

RedisAutoIncrement autoIncrement = new RedisAutoIncrement("localhost", 6379, "orderId");
long orderId = autoIncrement.generateId();
System.out.println("orderId: " + orderId);
autoIncrement.close();