build.xml

<project name="JsonMarshaller Japex" default="run" basedir=".">
     <property name="japexConfig" value="src/conf/japex-config.xml" />
     <!-- create class.path -->
     <path id="class.path">
         <pathelement location="target/classes" />
         <pathelement location="target/test-classes" />
         <!-- when running ant from the command line this location provides the ant.jar-->
         <pathelement location="${ant.core.lib}"/>
         <!-- when running from maven this path provides the ant.jar-->
         <pathelement path="${maven.plugin.classpath}"/>
     	 <fileset dir="target/dependency/" includes="*.jar" />
     </path>

     <target name="run">
     	<echo>running...</echo>
         <java dir="." fork="true" classname="com.sun.japex.Japex">
             <classpath refid="class.path" />
             <arg line="-last -line -merge ${japexConfig}/" />
         </java>
     </target>
</project>