update-version-in-poms.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="project" default="default">
	
    <taskdef resource="net/sf/antcontrib/antcontrib.properties">
    	<classpath>
    	  <pathelement location="ant-contrib-1.0b3.jar"/>
    	</classpath>
    </taskdef>
	
    <target name="default">
    	<loadfile property="pom" srcFile="pom.xml"/>
      <propertyregex property="util.version"
                  input="${pom}"
                  regexp="&lt;version&gt;(1\.20\d+\.\d)&lt;/version&gt;&lt;!--util.version--&gt;"
                  select="\1"/>
    	<echo message="current version: ${util.version}"/>
      <replaceregexp match="&lt;version&gt;1\.20\d+\.\d&lt;/version&gt;"
                     replace="&lt;version&gt;${util.version}&lt;/version&gt;">
        <fileset dir=".">
          <include name="**/pom.xml"/>
        </fileset>
      </replaceregexp>              
    </target>
</project>