Spring Statemachine is a framework for application developers to use state machine concepts with Spring applications.

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有些事物存在状态，并且可能随着某些事件的发生而发生变化。状态图就是用来记录事物的状态和事件，以及关系。

Curator n ˈkyoor͝ˌātər: a keeper or custodian of a museum or other collection - A ZooKeeper Keeper.

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@ServletComponentScan