A generic ant build script

build.xml

<project name="PROJECT_NAME" basedir="." default="default">
	<property name="author"     value=""                                   />
	<property name="vendor"     value=""                                   />
	<property name="version"    value=""                                   />
	<property name="pkg_base"   value=""                                   />
	<property name="jar_dir"    value="dist"                               />
	<property name="src_dir"    value="src"                                />
	<property name="build_dir"  value="build"                              />
	<property name="lib_dir"    value="lib"                                />
	<property name="class_dir"  value="${build_dir}/class"                 />
	<property name="jar_file"   value="${jar_dir}/${ant.project.name}.jar" />
	<property name="main_class" value="${pkg_base}.${ant.project.name}"    />

	<path id="build_classpath">
		<fileset dir="${lib_dir}">
			<include name="**/*.jar"/>
                        <exclude name="**/*src.jar"/>
		</fileset>
	</path>

	<mkdir dir="${jar_dir}"/>
	<manifestclasspath property="manifest_classpath" jarfile="${jar_file}">
		<classpath refid="build_classpath" />
	</manifestclasspath>

	<!-- ============ TARGET: CLEAN ==================== -->
	<target name="clean">
		<delete dir="${build_dir}"/>
		<delete file="${jar_file}"/>
	</target>

	<!-- ============ TARGET: COMPILE ================== -->
	<target name="compile">
		<mkdir dir="${class_dir}"/>
		<javac srcdir="${src_dir}" destdir="${class_dir}" debug="on" 
			debuglevel="lines,vars,source" includeantruntime="false">
			<classpath>
				<path refid="build_classpath"/>
			</classpath>
		</javac>
	</target>

	<!-- ============ TARGET: JAR ====================== -->
	<target name="jar" depends="compile">
		<jar destfile="${jar_file}" basedir="${class_dir}">
			<manifest>
				<attribute name="Manifest-Version" value="1.0"                  />
				<attribute name="Created-By"       value="${author}"            />
				<attribute name="Main-Class"       value="${main_class}"        />
				<attribute name="Version"          value="${version}"           />
				<attribute name="Vendor"           value="${vendor}"            />
				<attribute name="Class-Path"       value="${manifest_classpath}"/> 
			</manifest>
		</jar>
		<copy todir="${jar_dir}/lib" >
			<fileset file="lib/*.jar" />
		</copy>
	</target>

	<!-- ============ TARGET: DIST ==================== -->
	<target name="dist" depends="clean,compile">
		<unzip dest="${class_dir}">
			<path refid="build_classpath"/>
		</unzip>
		<mkdir dir="${jar_dir}"/>
		<jar destfile="${jar_file}" basedir="${class_dir}">
			<manifest>
				<attribute name="Manifest-Version" value="1.0"                  />
				<attribute name="Created-By"       value="${author}"            />
				<attribute name="Main-Class"       value="${main_class}"        />
				<attribute name="Version"          value="${version}"           />
				<attribute name="Vendor"           value="${vendor}"            />
			</manifest>
		</jar>
	</target>

	<!-- ============ TARGET: DEBUG ==================== -->
	<target name="debug" depends="compile">
		<java classpath="${class_dir}" classname="${main_class}" fork="true">
			<jvmarg line="-Xdebug"/>
			<jvmarg line="-Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n"/>
		<classpath>
			<path refid="build_classpath"/>
		</classpath>
		</java>
	</target>

	<!-- ============ TARGET: RUN ====================== -->
	<target name="run" depends="compile">
		<java classpath="${class_dir}" classname="${main_class}" fork="true">
		<classpath>
			<path refid="build_classpath"/>
		</classpath>
		</java>
	</target>

	<!-- ============ TARGET: DOCS ===================== -->
	<target name="docs">
		<javadoc
           destdir="docs/api"
           author="true"
           version="true"
           use="true"
           windowtitle="${ant.project.name} API">
			
			<fileset dir="${src_dir}" defaultexcludes="yes">
				<include name="**/*.java"/>
			</fileset>
			<classpath>
				<path refid="build_classpath"/>
			</classpath>
			<doctitle><![CDATA[<h1>${ant.project.name}</h1>]]></doctitle>
			<bottom><![CDATA[<i>Copyright &#169; 2010 ${vendor}. All Rights Reserved.</i>]]></bottom>
			<tag name="todo" scope="all" description="To do:"/>
			<group title="Packages" packages="${pkg_base}.*"/>
			<link offline="false" href="http://download.oracle.com/javase/6/docs/api/"/>
		</javadoc>
	</target>

	<!-- ============ TARGET: DEFAULT ================== -->
	<target name="default" depends="clean,jar"/>

        <!-- ============ TARGET: TEST ===================== -->
        <target name="test" depends="compile">
            <mkdir dir="${build_dir}/tests"/>
            <javac srcdir="tests" target="1.5" source="1.5" destdir="${build_dir}/tests"
                     debug="on" debuglevel="lines,vars,source" deprecation="true"
                     includeantruntime="false">
                <classpath>
                    <pathelement location="tests/junit-4.11.jar"/>
                    <pathelement location="tests/jsc.jar"/>
                    <pathelement path="${class_dir}"/>
                    <fileset dir="${lib_dir}">
                        <include name="**/*.jar"/>
                    </fileset>
                </classpath>
            </javac>
            <junit>
                <classpath>
                    <pathelement path="${build_dir}/tests"/>
                    <pathelement location="tests/junit-4.11.jar"/>
                    <pathelement location="tests/jsc.jar"/>
                    <pathelement path="${class_dir}"/>
                    <fileset dir="${lib_dir}">
                        <include name="**/*.jar"/>
                   </fileset>
               </classpath>
               <formatter type="brief" usefile="false" />
               <batchtest todir="tests">
                   <fileset dir="tests" includes="**/*Test*.java"/>
               </batchtest>
           </junit>
       </target>
</project>