Dear All:
My directory structure is the following:
libs/externa/ containing a.jar, b.jar
libs/installed/ the generated runnable JAR file, "sample.jar", will be here
src/ containing Java source files
build/ containing Java class files
The main class is x.y.z.MyMain
I have had a really hard time to create a runnable JAR file using
Ant(version 1.6.5). The JAR file, libs/installed/sample.jar, can be
generated. However, when I run it, the classes inside a.jar or b.jar are not
available and causes NullPointerException. When I un-tar sample.jar,
everything is there. I think manifest classpath is causing the problem.
Following is my brief build.xml:
<filelist id="external.jars" dir="libs/external">
<file name="a.jar" />
<file name="b.jar" />
</filelist>
<path id="project.classpath">
<pathelement location="./build" />
<filelist refid="external.jars"/>
</path>
<target name="build" depends="init">
<javac debug="true" debuglevel="${debuglevel}"
destdir="${build.dir}"
source="${source}" target="${target}">
<src path="src" />
<classpath refid="project.classpath" />
</javac>
</target>
<target name="jar" depends="clean, build">
<pathconvert property="manifest.classpath" pathsep=" ">
<mapper>
<chainedmapper>
<flattenmapper />
<globmapper from="*"
to="libs/external/*" />
</chainedmapper>
</mapper>
<path>
<filelist refid="external.jars"/>
</path>
</pathconvert>
<jar destfile="libs/installed/sample.jar" basedir="./build"
update="true">
<manifest>
<attribute name="Main-Class"
value="x.y.z.MyMain" />
<attribute name="Class-Path"
value="${manifest.classpath}"/>
</manifest>
<fileset dir="${externals.dir}"/>
</jar>
</target>
Thank you very much.
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