把属性的设置都放一个xml文件中

props.xml 文件

<property name="build.dir" value="build" />

然后在 build.xml 文件中加入如下

<!doctype project [<!entity properties system "file:props.xml">]>

二，将多个目录的源文件编译到一个地方

<javac destdir="build/classes">

    <src path="src1"/>

    <src path="src2"/>

</javac>

三，保存构建时的信息

<project default="init">

    <target name="init"></target>

    <property environment="env" />

    <property name="env.computername" value="${env.hostname}" />

    <propertyfile comment="build information" file="./buildinfo.properties">

        <entry key="build.host" value="${env.computername}" />

        <entry key="build.user.name" value="${user.name}" />

        <entry key="build.os.name" value="${os.name}" />

    </propertyfile>

</project>

四，去除属性文件的注释

属性文件：

# 这里是注释，会给过滤掉

build.dir = build

build文件：

<copy file="props.properties" todir="sample">

    <filterchain>

        <striplinecomments>

            <comment value="#" />

        </striplinecomments>

    </filterchain>

</copy>

五，两个花俏的功能

1.声音提示

<project name="sound" default="all">

    <property file="build.properties" />

    <target name="init">

        <sound>

            <success source="${sound.dir}/success.wav" duration="500" />

            <fail source="${sound.dir}/fail.wav" loops="2" />

        </sound>

    </target>

    <target name="fail" depends="init">

        <fail />

    </target>

    <target name="success" depends="init" />

    <target name="all" depends="success" />

</project>

2.进度条提示

<project name="splash" default="init">

    <target name="init">

        <splash imageurl="/upfile/2007-11/20071117110714562.gif" showduration="5000" />

        <sleep seconds="1" />

        <sleep seconds="1" />

        <sleep seconds="1" />

        <sleep seconds="1" />

        <sleep seconds="1" />

        <sleep seconds="1" />

    </target>

</project>