文本过滤指的是这样一个过程：获得文本的输入流，并在将文本发送给输出流之前对文本执行一些转换。

Text filtering is the process of taking an input stream of text and performing some conversion on the text before sending it to an output stream.

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许多文本处理命令（过滤器）可以从标准输入流或从文件中获取输入。

Many text processing commands (filters) can take input either from the standard input stream or from a file.

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该类实现了针对读取ZIP文件格式的文件的输入流过滤，包括支持压缩和解压项。

This class implements an input stream filter for reading files in the ZIP file format. Includes support for both compressed and uncompressed entries.

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