In my Java source-code I want to use different classes from java archives (.jar) stored in my application's "lib" directory. But if I do "ant run" then I always get a "java.lang.NoClassDefFoundError" message. I tried several things to fix it but nothing worked... Maybe someone here can help me?
This is my build.properties file:
app.name=MyApplication
app.version=1.0
main.class=mypackage.MyMain
build.dir=build
classes.dir=${build.dir}/classes
jar.dir=${build.dir}/jar
dist.dir=dist
src.dir=src
test.dir=test
lib.dir=lib
This is my build.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<project name="My Project" default="run" basedir=".">
<description>My description.</description>
<property file="build.properties" />
<path id="classpath">
<fileset dir="${lib.dir}" includes="*.jar"/>
</path>
<!-- Initialization -->
<target name="init" description="Prepare needed directories.">
<mkdir dir="${build.dir}" />
<mkdir dir="${classes.dir}" />
<mkdir dir="${jar.dir}" />
<mkdir dir="${dist.dir}" />
<mkdir dir="${lib.dir}" />
</target>
<!-- Cleanup -->
<target name="clean" description="Remove all files created by the build/test process.">
<delete dir="${classes.dir}" />
<delete dir="${dist.dir}" />
</target>
<!-- Compile application -->
<target name="compile">
<mkdir dir="${classes.dir}"/>
<javac srcdir="${src.dir}"
destdir="${classes.dir}"
debug="yes"
includeantruntime="false">
<!-- <classpath refid="classpath" /> -->
</javac>
</target>
<!-- Java Archive -->
<target name="jar" depends="compile">
<!--<delete file="${jar.dir}/${app.name}-${app.version}.jar"/>-->
<delete dir="${jar.dir}"/>
<mkdir dir="${jar.dir}"/>
<jar destfile="${jar.dir}/${app.name}-${app.version}.jar" basedir="${classes.dir}">
<manifest>
<attribute name="Class-Path" value="${lib.dir}"/>
<attribute name="Main-Class" value="${main.class}"/>
</manifest>
</jar>
</target>
<!-- Run application -->
<target name="run" depends="jar">
<java jar="${jar.dir}/${app.name}-${app.version}.jar"
fork="true">
</java>
<!--
<java fork="true" classname="${main.class}">
<classpath>
<path refid="classpath"/>
<path location="${jar.dir}/${app.name}-${app.version}.jar"/>
</classpath>
</java>
-->
</target>
</project>
It would be nice if anyone could help.
Cheers!
Benny
Replacing classes.dir=${build.dir}/classes
with classes.dir=build/classes
and jar.dir=${build.dir}/jar
with jar.dir=build/jar
from your build.properties
file will work.
Please edit target jar as follows. I am sure it will work.
<target name="jar" depends="compile">
<delete dir="${jar.dir}"/>
<mkdir dir="${jar.dir}"/>
<jar destfile="${jar.dir}/${app.name}-${app.version}.jar" basedir="${classes.dir}">
<manifest>
<attribute name="Class-Path" value="${lib.dir}"/>
<attribute name="Main-Class" value="${main.class}"/>
</manifest>
<zipgroupfileset dir="${lib.dir}"/>
</jar>
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