The Jaxen project is a Java XPath Engine. jaxen is a universal object model
walker, capable of evaluating XPath expressions across multiple models.
Currently supported are dom4j and JDOM .

Jaxen provides a single point for XPath expression evaluation, regardless of
the target object model, whether its dom4j, JDOM, DOM, JavaBeans, or whatnot.

WWW: http://jaxen.org