Делаем war-архив из ANT

<target name="build.war" depends="build.war.content">
    <delete file="${dir.build}/${name.application}.war"/>
    <war compress="true" encoding="utf-8"
     warfile="${dir.build}/${name.application}.war">
    <fileset dir="${dir.war.content}/${name.application}"/>
    </war>
</target>