15、Redis和Redisson有什么关系？

Redisson是一个高级的分布式协调Redis客服端，能帮助用户在分布式环境中轻松实现一些Java的对象
(Bloom filter, BitSet, Set, SetMultimap, ScoredSortedSet, SortedSet, Map, ConcurrentMap, List,
ListMultimap, Queue, BlockingQueue, Deque, BlockingDeque, Semaphore, Lock, ReadWriteLock,
AtomicLong, CountDownLatch, Publish / Subscribe, HyperLogLog)。