如何用ant解压和压缩文件
解压文件，然后替换了2个文件，然后压缩为文件（文件名中包含了日期）。
<?xml version="1.0" encoding="UTF-8"?><project name="unzip" default="auto-build" basedir="."> <tstamp> <format property="TODAY" pattern="dd-MMM-yyyy" locale="us"/></tstamp><target name="-check-exist"> <available property="file.exists" file="apache-archiva-1.4-M1"/></target><target name="delete-file" depends="-check-exist" if="${file.exists}"> <delete file="apache-archiva-1.4-M1"/> <echo>delete file...</echo></target><target name="auto-build" depends="delete-file"><unzip src="apache-archiva-1.4-M1-bin.zip" dest="." /><copy file="37870_thumb_logo.png" todir="apache-archiva-1.4-M1/apps/archiva/images"/><delete file="apache-archiva-1.4-M1/conf/archiva.xml"/><copy file="archiva.xml" todir="apache-archiva-1.4-M1/conf"/><delete file="apache-archiva-1.4-M1/conf/jetty.xml"/><copy file="jetty.xml" todir="apache-archiva-1.4-M1/conf"/><zip basedir="apache-archiva-1.4-M1" destfile="apache-archiva-1.4-M1-${TODAY}.zip"/></target></project>