java - 在 ant 中定义一个列表或一组变量

Question

我想在 ant 构建文件中定义一个变量列表，以便在我的任务中使用这个列表的 for 循环。我该怎么做？

p.s.: 应该是这样的:

<varlist name="mylist"> <!-- Actually, there is no such tag in Ant -->
    <item>someThing</item>
    <item>anotherThing</item>
</varlist>

...

<for param="item" list="${mylist}">
    <sequential>
        <echo>@{item}</echo>
    </sequential>
</for>

Answer 1

<!-- "For" task is supported by Ant-Contrib Tasks 
http://ant-contrib.sourceforge.net/tasks/tasks/index.html -->
<taskdef resource="net/sf/antcontrib/antlib.xml">
  <classpath>
    <pathelement location="ant-contrib-1.0b3.jar"/>
  </classpath>
</taskdef>

<property name="someThing" value="Hello"/>
<property name="anotherThing" value="World!"/>

<target name="loop">
    <for param="item" list="${someThing},${anotherThing}">
        <sequential>
            <echo>@{item}</echo>
        </sequential>
    </for>
</target>