命令模式（Command）
2019-05-12 11:02:20 7 举报命令模式（Command）
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命令模式：将一个请求封装为一个对象，从而使你可用不同的请求对客户进行参数化
Command
- receiver:Receiver
+ Command(receiver:Receiver)+ execute(obj:Object):Object
DeleteCommand
+ DeleteCommand(receiver:Receiver)+ execute(obj:Object):Object
ChangeCommand
+ ChangeCommand(receiver:Receiver)+ execute(obj:Object):Object
AddCommand
+ AddCommand(receiver:Receiver)+ execute(obj:Object):Object
FindCommand
+ FindCommand(receiver:Receiver)+ execute(obj:Object):Object
Invoker
- command:Command
+ setCommand(command:Command):void+ execute(obj:Object)Object
Receiver
+ add(obj:Object):Object+ delete(obj:Object):Object+ change(obj:Object):Object+ find(obj:Object):Object
调用者
命令
执行者
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