[JAVA] ANT 基础

1. 基本语法
1-1. target
1-1-1. if
<target name="" if="prop">
仅当 if 指定的属性被设置时才执行

1-1-2. unless
<target name="" unless="prop">
仅当 unless 指定的属性没有被设置时才执行

2. 判断 JVM 版本

<project basedir="." default="test">

<target name="get-jvm">
    <condition property="jvm.ok">
        <not>
            <equals arg1="${ant.java.version}" arg2="1.1"/>
        </not>
    </condition>
</target>

<target name="check-jvm" depends="get-jvm" unless="jvm.ok">
    <fail message="Wrong JVM - ${ant.java.version}"/>
</target>

<target name="test" depends="check-jvm">
    <echo message="JVM OK - ${ant.java.version}"/>
</target>

</project>