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Account No.: 824880031410001It's hard work, and the technology is sticking to the top.3. Check the docker_demo directory:User class unified interface, User1 and User2 are different objects respectively, and they are related. If the mediator mode is not adopted, the two need to hold references to each other, so the coupling degree between the two is very high. In order to decouple, the Mediator class is introduced to provide unified interface, and MyMediator is its implementation class, which holds instances of User1 and User2 to control User1 and User2. In this way, User1 and User2 objects are independent of each other. They only need to maintain a good relationship with the Mediator, and the rest is maintained by the MyMediator class! Basic implementation:Eval does not introduce variables in its outer scope这峡谷是高凡经营好久的一个联络地，地里位置隐蔽不说，峡谷东头有一个天然大山塘，用水很方便。