ant从svn下载

 <target name="checkout">  
   <exec executable="svn" failonerror="true">
    <arg value="checkout" /> 
       <arg value="https://svn.com/prod/SRE/source/RuleEngine/testcases/mock_data"/>   
    <arg value="checkout/mock_data"/>   
   </exec>  
   <delete includeemptydirs="true">
       <fileset dir="${basedir}/checkout" defaultexcludes="false" includes="**\*.svn\"/>
   </delete>
    </target>