用Java读取纯文本文件 - Reading a plain text file in Java

问题：

It seems there are different ways to read and write data of files in Java. 彷佛有多种方法能够用Java读写文件数据。

I want to read ASCII data from a file. 我想从文件中读取ASCII数据。 What are the possible ways and their differences? 有哪些可能的方法及其区别？

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解决方案：

参考一： https://stackoom.com/question/Jmyd/用Java读取纯文本文件
参考二： https://oldbug.net/q/Jmyd/Reading-a-plain-text-file-in-Java