Commons IO是Jakarta Commons项目的一个子项目。考虑到IO实现所需要的技巧，一般不推荐普通程序员去实现自己的IO代码，Commons IO包含了大量Java IO的标准处理过程和类，例如流、过滤器等。
他们提到：
"This release fixes all open bugs, and adds various enhancements, including: FilenameUtils - A static utility class for working with filenames without File objects, FileSystemUtils - A static utility class that allows you to get the free space on a drive, IOUtils/FileUtils - read and write files line by line into a List, and WildcardFilter - A new filter that can match using wildcard file names. ...There are some minor semantic changes caused by bug fixes which should not affect the vast majority of 1.0 users ...To simplify the API, there has also been a deprecation"
下载：
http://jakarta.apache.org/commons/io/
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