ANT 打jar包

<?xml version="1.0"?>
<project name="javaTest" default="jar" basedir=".">
<target name="clean">
<delete dir="build"/>
</target>
<path id="classpath">  
<fileset  dir="lib">
<include name="*.jar"/>
</fileset>
</path>
<target name="compile" depends="clean">
<mkdir dir="build/classes"/>
<javac srcdir="src" destdir="build/classes" encoding="UTF-8">
<classpath refid="classpath"/>   
</javac>
</target>
<target name="run" depends="compile">
<java classname="Main">
<classpath>
<!--<classpath ref>>