RedisLock分布式redis锁

@Component
public class RedisLock {
Logger logger= LoggerFactory.getLogger(RedisLock.class);
private static final String LOCK_SUCCESS = "OK";
private static final String SET_IF_NOT_EXIST = "NX";//NX是毫秒，EX是秒
private static final String SET_WITH_EXPIRE_TIME = "PX";

/** * 尝试获取分布式锁 * @param lockKey 锁 * @param requestId 请求标识 * @param expireTime 超期时间 * @return 是否获取成功 */public boolean tryGetDistributedLock(String lockKey, String requestId, int expireTime) {    Jedis jedis=null;    try{        jedis = Const.jedisPoolCommon.getResource();        String result =jedis.set(lockKey, requestId, SET_IF_NOT_EXIST, SET_WITH_EXPIRE_TIME, expireTime);        if (LOCK_SUCCESS.equals(result)) {            return true;        }    }catch (Exception ex){        logger.error("tryGetDistributedLock异常"+ex);    }finally {        if(jedis!=null){            jedis.close();        }    }    return false;}private static final Long RELEASE_SUCCESS = 1L;/** * 释放分布式锁 * @param lockKey 锁 * @param requestId 请求标识 * @return 是否释放成功 */public boolean releaseDistributedLock( String lockKey, String requestId) {    Jedis jedis = null;    try{        jedis=Const.jedisPoolCommon.getResource();        String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";        Object result = jedis.eval(script, Collections.singletonList(lockKey), Collections.singletonList(requestId));        if (RELEASE_SUCCESS.equals(result)) {            return true;        }    }catch (Exception ex){        logger.error("releaseDistributedLock异常"+ex);    }finally {        if(jedis!=null){            jedis.close();        }    }    return false;}

}