一个简单的ant脚本

<?xml version="1.0"?>  
<project name="test" default="package">
<target name="init">
   <mkdir dir="build/classes"/>
   <mkdir dir="dist"/>
</target>

<target name="compile" depends="init" description="compile java code">
   <javac srcdir="src" destdir="build/classes"/>
</target>

<target name="package" depends="compile" description="generate jar files">
   <jar destfile="dist/test.jar" basedir="build/classes"/>
</target>

<target name="clean" description="delete generated directories">
   <delete dir="build"/>
   <delete dir="dist"/>
</target>  

</project>