build.xml

<project name="ltp4j" basedir="." default="main">
    <property name="src.dir" value="src"/>
    <property name="build.dir" value="build_jar"/>
    <property name="classes.dir" value="${build.dir}/classes"/>
    <property name="jar.dir" value="${build.dir}/jar"/>
    <property name="library" value="${project.home}/libs"/>

    <path id="classpath">
    </path>

    <target name="clean">
        <delete dir="${build.dir}"/>
    </target>

    <target name="compile">
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}" classpathref="classpath"/>
    </target>

    <target name="jar" depends="compile">
        <mkdir dir="${jar.dir}"/>
        <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}"/>
    </target>

    <target name="clean-build" depends="clean,jar"/>
    <target name="main" depends="clean,jar"/>
</project>