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	https://github.com/Coder-Kevin/Java/blob/master/docs/JavaIO/06NIO.md#文件-nio-实例
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	https://github.com/Coder-Kevin/Java/blob/master/docs/JavaIO/06NIO.md#参考资料
https://juejin.im/post/5b4570cce51d451984695a9b	https://juejin.im/post/5b4570cce51d451984695a9b
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