網址：http://antelope.tigris.org/

我用到過一個控制時間的標簽

2。ant-contrib

網址：ant-contrib.sourceforge.net

我用到過<if><else><then>等邏輯標簽。

下面是我寫的一個ant片斷，用來copy不存在的文件，如果存在，則詢問是否覆蓋。
?<!--? tasks for copy required system files -->

?<taskdef resource="net/sf/antcontrib/antcontrib.properties" classpath="../WEB-INF/lib/ant-contrib-1.0b2.jar" />

?<target name="deploySysFiles">
??<var name="targetFile" unset="true" />
??<property name="targetFile" value="${JavaStatusSchemePath}" />
??<var name="originalFile" unset="true"/>
??<property name="originalFile" value="${JavaStatusSchemePath-Original}"/>
??<antcall target="deploySysFile" />
?</target>

?<target name="deploySysFile">
??<echo>check file : ${targetFile} exist or not</echo>
??<available file="${targetFile}" property="targetFileExisting" />
??<if>
???<not>
????<isset property="targetFileExisting" />
???</not>
???<then>
????<antcall target="copyTargetFile" />
???</then>
???<elseif>
????<isset property="targetFileExisting" />
????<then>
?????<antcall target="overrideTargetFile" />
????</then>
???</elseif>
??</if>
??<echo>deploy system files over</echo>
?</target>

?<target name="overrideTargetFile">
??<limit seconds="${timeoutSecond}">
???<input validargs="y,n" addproperty="answer" defaultvalue="n" message="file '${targetFile}' already existed,do you want to override?" />
??</limit>
??<condition property="override">
???<equals arg1="y" arg2="${answer}" />
??</condition>
??<if>
???<isset property="override" />
???<then>
????<echo>override the file...</echo>
????<copy tofile="${targetFile}" file="${originalFile}" overwrite="true" encoding="ms932" />
???</then>
??</if>
?</target>
?<target name="copyTargetFile">
??<echo>file ${targetFile} dose not existed,deploying this file</echo>
??<copy file="${originalFile}" tofile="${targetFile}" encoding="ms932" />
?</target>
?<!-- end copy system files. -->