Ant属性echo不工作

在

build.properties

中，我有一个更新ant属性的ant任务

蚂蚁任务： 但是${application}.cp}只打印/app/twix16/Jenkins/Buildframework/workspace/jars/SelectDocId.jar

---

任何帮助都会很好

Ant中的属性是不可变的，请参见

<for list="${jar.list}" param="jar">
<sequential>
<loadproperties srcfile="${basedir}/build.properties"/> 
<if>
<isset property="@{application}.cp"/>
<then>
<propertyfile file="${basedir}/build.properties">   
<entry  key="@{application}.cp" value="${path.separator}" operation="+" />
<entry  key="@{application}.cp" value="${shipment.dir}/workspace/${common.bw.jars.dirname}/@{jar}" operation="+"/>
</propertyfile>
</then>
<else>
<propertyfile file="${basedir}/build.properties">   
<entry  key="@{application}.cp" value="${shipment.dir}/workspace/${common.bw.jars.dirname}/@{jar}" operation="+"/>
</propertyfile>
</else>
</if>                                                   
</sequential>
</for>      
<loadproperties srcfile="${basedir}/build.properties"/> 
<echo>  ${@{application}.cp} </echo>

application.libs=/app/twix16/Jenkins/Buildframework/workspace/built_libraries/BP.Marko.Shared_v1.0.projlib\:/app/twix16/Jenkins/Buildframework/workspace/built_libraries/BWUnit.projlib
application.cp=/app/twix16/Jenkins/Buildframework/workspace/jars/SelectDocId.jar\:/app/twix16/Jenkins/Buildframework/workspace/jars/TextDiff.jar

"whoever sets a property first freezes it for the rest of the build; they are most definitely not variables."