<project name="tomcatant" default="tomcat-restart">

    <property name="tomcat.home" value="C:\path\to\your\tomcat-x.x.x" />

    <target name="tomcat-restart">
        <antcall target="tomcat-stop" />
        <antcall target="tomcat-start" />
    </target>

    <target name="tomcat-start">
        <java classname="org.apache.catalina.startup.Bootstrap" fork="true">
            <classpath path="${tomcat.home}/bin/bootstrap.jar:${tomcat.home}/bin/tomcat-juli.jar" />
            <jvmarg value="-Dcatalina.home=${tomcat.home}"/>
            <!--If you are getting any OutOfMemoryError, remove the comments
            and enable jvm argument of the following line-->
            <!--jvmarg value="-XX:MaxPermSize=256m"/-->
        </java>
    </target>

    <target name="tomcat-stop">
        <java classname="org.apache.catalina.startup.Bootstrap" fork="true">
            <classpath path="${tomcat.home}/bin/bootstrap.jar:${tomcat.home}/bin/tomcat-juli.jar" />
            <jvmarg value="-Dcatalina.home=${tomcat.home}"/>
            <arg line="stop"/>
        </java>
    </target>

</project>