Math 类库，包含了Java 语言基础类库中没有的数学、统计学相关的基础工具。-Commons Math is a library of lightweight, self-contained mathematics and statistics components addressing the most common problems not available in the Java programming language or Commons Lang.

java web 邮件的创建，发送邮件，接受邮件，跳转网页，反馈是否接发送，受成功。-Apache Commons Email Copyright 2001-2009 The Apache Software Foundation This product includes software developed by The Apache Software Foundation (http://www.apache.org/).

Apache-commons-io-2,5 Java source code-Apache Commons- IO- 2, 5 Java source code