PropertyRegExp.xml

<?xml version="1.0"?>
<project name="moveit" default="build" basedir="./">
    <taskdef resource="net/sf/antcontrib/antcontrib.properties">
        <classpath>
            <pathelement location="${basedir}/Documents/Works/warcloud/build/tools/ant-contrib-1.0b3.jar"/>
        </classpath>
    </taskdef>
    <target name="build">
		<var name="file.default" value="idle"/>
		<foreach param="file.name" target="moveit">
			<path>
				<filelist dir="./" files="aaa.png, bbb_aaa.png, bbb_bbb.png, ccc_aaa_0.png"/>
			</path>
		</foreach>
	</target>
	<target name="moveit">
		<echo message="file.name: ${file.name} ${file.default}"/>
		<basename property="basename" file="${file.name}" suffix=".png"/>
		<echo message="basename: ${basename}"/>
		<propertyregex property="output"
              input="${basename}"
              regexp="(.+?)_(.+)"
              select="\2"
			  defaultValue="${file.default}"/> 
	    <propertyregex property="dirname"
              input="${basename}"
              regexp="(.+?)_(.+)"
              select="\1"
			  defaultValue="${basename}"/>
		<echo message="dirname: ${dirname}"/>
		<echo message="output: ${output}"/>
    </target>

</project>