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21.文件读写和异常处理.md
实际开发中常常会遇到对数据进行持久化的场景,所谓持久化是指将数据从无法长久保存数据的存储介质(通常是内存)转移到可以长久保存数据的存储介质(通常是硬盘)中。实现数据持久化最直接简单的方式就是通过文件系统将数据保存到文件中。 计算机的 ...
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