https://github.com/redisson/redisson/wiki/6.-%E5%88%86%E5%B8%83%E5%BC%8F%E5%AF%B9%E8%B1%A1#61-%E9%80%9A%E7%94%A8%E5%AF%B9%E8%B1%A1%E6%A1%B6object-bucket
