I have an eclipse's .classpath file that looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="src" path="test"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="output" path="bin"/>
    <classpathentry kind="lib" path="/libraries/jee/servlet-api.jar"/>
    <classpathentry kind="lib" path="/libraries/junit/junit-4.6.jar"/>
    <classpathentry kind="lib" path="/libraries/log4j/log4j-1.2.15.jar"/>
</classpath>

I'd like to add a whole directory of jars to the classpath - I like eclipse (or more precisely, our ant-based build process that uses .classpath format) to know several jars that reside in a single directory, without specifying them directly. How can I do that?