Redis全局ID生成器的实现

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.fORMat.DateTimeFormatter;
 
@Component
public class RedisIdWorker {
 
    
    private static final long BEGIN_TIMESTAMP = 1640995200L;
 
    
    private static final int COUNT_BITS = 32;
 
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
 
    
    public long nextId(String keyPrefix) {
        // 生成时间戳
        long timestamp = LocalDateTime.now().toEpochSecond(ZoneOffset.UTC) - BEGIN_TIMESTAMP;
        // 生成序列号
        String key = "icr:" + keyPrefix + ":" + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count = stringRedisTemplate.opsForValue().increment(key);
        // 拼接并返回
        return timestamp << COUNT_BITS | count;
    }
 
    
    public static void main(String[] args) {
        LocalDateTime time = LocalDateTime.of(2022, 1, 1, 0, 0, 0);
        long second = time.toEpochSecond(ZoneOffset.UTC);
        System.out.println(second);
    }
}