如何从Ant任务中读取非xml文件？

property1=value1
property2=value2

   <target name="read-file">
        <loadfile srcfile="file.txt" property="file.content"/>
       <property name="properties" value="${file.content}"/>
        <echo message="Property 1: ${property1}"/>
        <echo message="Property 2: ${property2}"/>
    </target>
</project>

ant read-file

Buildfile: /path/to/build.xml

read-file:
     [echo] Property 1: value1
     [echo] Property 2: value2

BUILD SUCCESSFUL
Total time: 0 seconds