最新的Apache Commons IO 2.5，支持JDK1.6+，压缩包包含以下内容：
jar、javDoc等。
Commons IO
Commons IO is a library of utilities to assist with developing IO functionality.
There are six main areas included:
1.Utility classes - with static methods to perform common tasks
2.Input - useful Input Stream and Reader implementations
3.Output - useful Output Stream and Writer implementations
4.Filters - various implementations of file filters
5.Comparators - various implementations of java.util.Comparator for files
File Monitor - a component for monitoring file system events
