build.xml

<?xml version="1.0"?>
<project name="network builder" default="jar" basedir=".">
        <property name="src.dir" value="src"/>
        <property name="build.dir" value="build"/>
        <property name="lib.dir" value="lib"/>
        <property name="dist.dir" value="dist"/>
        <property name="jar.name" value="build-network.jar"/>
        
        <path id="class.path">
                <pathelement location="${build.dir}"/>
                <fileset dir="lib">
                        <include name="*.jar"/>
                </fileset>
        </path>

        <target name="prepare">
                <mkdir dir="${build.dir}"/>
                <mkdir dir="${dist.dir}"/>
        </target>

        <target name="clean" description="Remove all generated files.">
                <delete dir="${build.dir}"/>
                <delete dir="${dist.dir}"/>
        </target>

        <target name="compile" depends="prepare" description="Compile sources">
                <javac srcdir="${src.dir}"
                           includes="**"
                           destdir="${build.dir}"
                           debug="true">
                        <classpath refid="class.path"/>
                </javac>
        </target>

        <target name="jar" depends="compile" description="Generates executable jar file">
                <pathconvert refid="class.path" property="class.path.manifest" pathsep=" ">
                        <mapper>
                                <chainedmapper>
                                        <!-- remove absolute path -->
                                        <flattenmapper />
                                        <!-- add lib/ prefix -->
                                        <globmapper from="*" to="lib/*" />
                                </chainedmapper>
                        </mapper>
                </pathconvert>

                <jar jarfile="${jar.name}">
                        <manifest>
                                <attribute name="Class-Path" value="${class.path.manifest}"/>
                        </manifest>
                        <fileset dir="${build.dir}" includes="**/*.class"/>
                </jar>
        </target>

        <target name="dist" depends="jar" description="Copies jar and external libraries to dist path">
                <copy file="${jar.name}" toDir="${dist.dir}"/>
                <copy toDir="${dist.dir}/lib">
                        <fileset dir="${lib.dir}">
                                <include name="**/*.jar"/>
                        </fileset>
                </copy>
        </target>
</project>