Digester 就是让你配置一个 XML 转到 Java Object 对应的程序，或者说是解析 XML 的工具。-Allows you to configure the Digester is an XML to Java Object corresponding procedures, or analytical tools for XML.

java iText 2.1.7jar包，使用时将后缀名修改为jar即可，iText提供了非常强大的PDF编辑功能-java iText 2.1.7jar package, when using the extension can be modified to jar, iText provides a very powerful PDF editing capabilities

mybatis3.2.7jar包 还有API文档 方便大家学习(mybatis's jar and API It's good for our study)