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Groups > comp.lang.java.programmer > #10937

cannot create the runnable JAR file containing 3rd party JAR files

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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>
					<!-- remove absolute path -->
					<flattenmapper />

					<!-- add libs/external prefix -->
					<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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cannot create the runnable JAR file containing 3rd party JAR files www <xsli2@yahoo.com> - 2011-12-21 12:03 -0800
  Re: cannot create the runnable JAR file containing 3rd party JAR files markspace <-@.> - 2011-12-21 14:23 -0800
    Re: cannot create the runnable JAR file containing 3rd party JAR files www <xsli2@yahoo.com> - 2011-12-21 17:29 -0800
  Re: cannot create the runnable JAR file containing 3rd party JAR files Roedy Green <see_website@mindprod.com.invalid> - 2011-12-22 02:22 -0800

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