https://github.com/ben-manes/caffeine
咖啡因提供了我想要的即开即用的行为
refreshAfterWrite:
LoadingCache<K, V> cache = Caffeine.newBuilder() .refreshAfterWrite(expireTime, timeUnit) .maximumSize(maxCountOfItems) .build(k->loader.load(k));

https://github.com/ben-manes/caffeine
咖啡因提供了我想要的即开即用的行为
refreshAfterWrite:
LoadingCache<K, V> cache = Caffeine.newBuilder() .refreshAfterWrite(expireTime, timeUnit) .maximumSize(maxCountOfItems) .build(k->loader.load(k));