使用Ant构建多个jar

Question

I have multiple Java eclipse projects. Each of them has "jardesc" file for building jar. It's nice - double click -> finish and jar file is made. But when i have to export several jars it's a pain - i have to repeat procedure several times. Please tell me, can i use Ant script to run several "jardesc" files at once (and get several jars according to each jardesc file)? How to do it?

Answer 1

You could use the jar target to make the jars for you:

    <jar destfile='destination.jar' basedir='source\dir\' />

so your build.xml would look a little like this:

    <project default="makejars">
        <target name="makejars">
            <jar destfile="app1.jar" basedir="app1\src\" />
            <jar destfile="app2.jar" basedir="app2\src\" />
            <jar destfile="app3.jar" basedir="app3\src\" /> 
        </target>
    </project>

then just run ant in the same directory as build.xml, and the jars should be made.

Answer 2

Take a look at subant task in ant. You can create ant-file which would call other files to.

    <subant target="create_jar1">
        <fileset dir="." includes="jar2.xml"/>
    </subant>
    <subant target="create_jar2">
        <fileset dir="." includes="jar1.xml"/>
    </subant>

Answer 3

您可以使用一些循环来创建ant参数，但是没有办法循环创建多个jar （即使使用ant-commons扩展），复制和粘贴是唯一可行的解​​决方案， 除非您想编写一个ant插件 （它没有'真的花了2个小时阅读docs +写简单的插件）