使用redis的RedisAtomicLong可以生成分布式自增的ID值。
SequenceFactory是封装的一个工具类，利用redisTemplate生成自增ID,实现如下：
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.data.redis.support.atomic.RedisAtomicLong; import org.springframework.stereotype.Service; import java.util.Date; import java.util.concurrent.TimeUnit; @Service public class SequenceFactory { @Autowired RedisTemplate<String, String> redisTemplate; /** * @param key * @param value * @param expireTime * @Title: set * @Description: set cache. */ public void set(String key, int value, Date expireTime) { RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory()); counter.set(value); counter.expireAt(expireTime); } /** * @param key * @param value * @param timeout * @param unit * @Title: set * @Description: set cache. */ public void set(String key, int value, long timeout, TimeUnit unit) { RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory()); counter.set(value); counter.expire(timeout, unit); } /** * @param key * @return * @Title: generate * @Description: Atomically increments by one the current value. */ public long generate(String key) { RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory()); return counter.incrementAndGet(); } /** * @param key * @return * @Title: generate * @Description: Atomically increments by one the current value. */ public long generate(String key, Date expireTime) { RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory()); counter.expireAt(expireTime); return counter.incrementAndGet(); } /** * @param key * @param increment * @return * @Title: generate * @Description: Atomically adds the given value to the current value. */ public long generate(String key, int increment) { RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory()); return counter.addAndGet(increment); } /** * @param key * @param increment * @param expireTime * @return * @Title: generate * @Description: Atomically adds the given value to the current value. */ public long generate(String key, int increment, Date expireTime) { RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory()); counter.expireAt(expireTime); return counter.addAndGet(increment); } }文章来源: Redis生成分布式自增ID