一个完整的ant-j2se事例

<?xml version="1.0" ?><project name="structured" default="all" basedir=".">   <!-- all 代表执行 target为all 的任务 , 如果 all中 execute 任务没有包含，则不会执行-->	<description>Compiles and runs a simple program</description>	<property name="app.name" value="AntProject" />	<property name="app.jar" value="${app.name}.jar" />	<property name="lib.dir" value="lib" />	<property name="src.dir" location="src" />	<property name="build.dir" location="build" />	<property name="dist.dir" location="dist" />	<target name="init">		<mkdir dir="${build.dir}" />		<mkdir dir="${dist.dir}" />		<mkdir dir="${build.dir}/lib" />	</target>	<target name="compile" depends="init" description="Compiles the source code">		<javac srcdir="${src.dir}" destdir="${build.dir}" source="1.6" target="1.6" debug="on" />  <!-- 调试模式开启 -->		<copy todir="${build.dir}">  <!-- 拷贝文件 todir 目标文件 -->			<fileset dir="${src.dir}">				<include name="*.xml" />				<include name="*.properties" />			</fileset>		</copy>		<copy todir="${build.dir}/lib">			<fileset dir="${lib.dir}">				<include name="**/*.jar" />			</fileset>		</copy>	</target>	<target name="dist" depends="compile" description="generate the distribution">		<jar jarfile="${dist.dir}/${app.jar}" basedir="${build.dir}" >		  <manifest>		    <attribute name="Main-class" value="com.tyler4life.ant.HelloWorld"/>		  </manifest>		</jar>		  <!-- 打包 -->	</target>	<target name="clean" description="Removes the temporary directories used">		<delete dir="${build.dir}/lib">		</delete>		<delete dir="${build.dir}" />		<delete dir="${dist.dir}" />	</target>	<target name="execute" depends="compile" description="Runs the program">		<echo level="warning" message="running" />		<java classname="com.tyler4life.ant.HelloWorld" classpath="${build.dir}">			<arg value="a" />			<arg value="b" />			<arg file="." />		</java>	</target>	<target name="all" depends="clean,init,dist,execute" description="Clean,build,dist" /></project>