Java文件锁定在网络上

public class RedisDistributedLock {
    private static final String LOCK_SUCCESS = "OK";
    private static final String SET_IF_NOT_EXIST = "NX";
    private static final String SET_WITH_EXPIRE_TIME = "PX";

    private final JedisPool jedisPool;

    public RedisDistributedLock(JedisPool jedisPool) {
        this.jedisPool = jedisPool;
    }

    public boolean lock(String lockKey, int expireTime, int timeout) {
        Jedis jedis = null;
        try {
            jedis = jedisPool.getResource();
            long startTime = System.currentTimeMillis();
            while (true) {
                String result = jedis.set(lockKey, "1", SET_IF_NOT_EXIST, SET_WITH_EXPIRE_TIME, expireTime);
                if (LOCK_SUCCESS.equals(result)) {
                    return true;
                }
                if (System.currentTimeMillis() - startTime > timeout) {
                    return false;
                }
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        } finally {
            if (jedis != null) {
                jedis.close();
            }
        }
    }

    public void unlock(String lockKey) {
        Jedis jedis = null;
        try {
            jedis = jedisPool.getResource();
            jedis.del(lockKey);
        } finally {
            if (jedis != null) {
                jedis.close();
            }
        }
    }
}