Merge branch 'master' of https://github.com/CyC2018/Interview-Notebook
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1a1a3f0c8b
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@ -699,6 +699,11 @@ request2 is handle by ConcreteHandler2
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将命令封装成对象中,具有以下作用:
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<<<<<<< HEAD
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=======
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将命令封装成对象中,具有以下作用:
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>>>>>>> bb2592f820012d6220462f6a18a28d80983aa3f0
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- 使用命令来参数化其它对象
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- 将命令放入队列中进行排队
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- 将命令的操作记录到日志中
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