Jakarta Commons项目源于重用，其中的程序包必须确保能够重用。有一些包来自于其他项目，例如通用日志包是Jakarta Struts的一部分。当开发者发现某个包对于其他项目很有用，可以缩短开发周期，他们决定将这些包做成通用组件。这就是Jakarta Commons项目。 要真正做到可重用，每个程序包必须独立于其他较大的框架和项目。因此，Commons项目中的每个包在很大程度上是独立的，不仅相对于其他项目，甚至对于其他包也是如此。违反这一原则的情况是存在的，但决大多数情况是使
This book takes the most stable, popular and useful sub-projects that form Jakarta Commons and provides much needed documentation and usage information on how best to incorporate them into Java applications.
This collection provides expert tips for using the utilities of the Java-based Jakarta Commons open source project. You don't have to be an expert, the book's solution-based format contains code examples for a wide variety of web, XML, network, test
This book takes the most stable, popular and useful sub-projects that form Jakarta Commons and provides much needed documentation and usage information on how best to incorporate them into Java applications.
