问在webapp中获取当前svn版本

EN

<target name="package" depends="compile" description="Package up the project as a jar">
<!-- Create the subversion version string -->
<exec executable="svnversion" failifexecutionfails="no" outputproperty="version">
  <arg value="."/> 
  <arg value="-n"/>
</exec>
<!-- Create the time stamp -->
<tstamp>
  <format property="timeAndDate" pattern="HH:mm d-MMMM-yyyy"/>
</tstamp>

<jar destfile="simfraserv.jar">
  <manifest>
    <attribute name="Built-By"                value="${user.name} on ${time.date}" />
    <attribute name="Implementation-Version"  value="${svn.version}" />
    <attribute name="Implementation-Java"     value="${java.vendor} ${java.version}" />
    <attribute name="Implementation-Build-OS" value="${os.name} ${os.arch} ${os.version}" />
    <attribute name="JVM-Version"             value="${common.sourcelevel}+" />        
  </manifest>
  <fileset dir="bin">
    <include name="**/*.class"/>
  </fileset>
  <fileset dir="src">
    <include name="**"/>
  </fileset>
</jar>
</target>

String version = this.getClass().getPackage().getImplementationVersion();

 <target name="version">
<exec executable="svn" output="svninfo.xml" failonerror="true">
  <arg line="info --xml" />
</exec>
<xmlproperty file="svninfo.xml" collapseattributes="true" />
<echo message="SVN Revision: ${info.entry.commit.revision}"/>
<property name="revision" value="${info.entry.commit.revision}" />
</target>