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POIncluding external jar-files in a new jar-file build with Ant
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  1. POIncluding external jar-files in a new jar-file build with Ant
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    copied!<p>I have just 'inherited' a Java-project and not coming from a Java-background I am a little lost at times. Eclipse is used to debug and run the application during development. I have through Eclipse succeeded in creating a .jar-file that 'includes' all the required external jars like Log4J, xmlrpc-server, etc. This big .jar can then be run successfully using:</p> <pre><code>java -jar myjar.jar </code></pre> <p>My next step is to automate builds using Ant (version 1.7.1) so I don't have to involve Eclipse to do builds and deployment. This has proven to be a challenge due to my lacking java-knowledge. The root of the project looks like this:</p> <pre><code>|-&gt; jars (where external jars have been placed) |-&gt; java | |-&gt; bin (where the finished .class / .jars are placed) | |-&gt; src (Where code lives) | |-&gt; ++files like build.xml etc |-&gt; sql (you guessed it; sql! ) </code></pre> <p>My build.xml contains the following:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="no"?&gt; &lt;project basedir="." default="build" name="Seraph"&gt; &lt;property environment="env"/&gt; &lt;property name="debuglevel" value="source,lines,vars"/&gt; &lt;property name="target" value="1.6"/&gt; &lt;property name="source" value="1.6"/&gt; &lt;property name="build.dir" value="bin"/&gt; &lt;property name="src.dir" value="src"/&gt; &lt;property name="lib.dir" value="../jars"/&gt; &lt;property name="classes.dir" value="${build.dir}/classes"/&gt; &lt;property name="jar.dir" value="${build.dir}/jar"/&gt; &lt;property name="jar.file" value="${jar.dir}/seraph.jar"/&gt; &lt;property name="manifest.file" value="${jar.dir}/MANIFEST.MF"/&gt; &lt;property name="main.class" value="no.easyconnect.seraph.core.SeraphCore"/&gt; &lt;path id="external.jars"&gt; &lt;fileset dir="${lib.dir}" includes="**/*.jar"/&gt; &lt;/path&gt; &lt;path id="project.classpath"&gt; &lt;pathelement location="${src.dir}"/&gt; &lt;path refid="external.jars" /&gt; &lt;/path&gt; &lt;target name="init"&gt; &lt;mkdir dir="${build.dir}"/&gt; &lt;mkdir dir="${classes.dir}"/&gt; &lt;mkdir dir="${jar.dir}"/&gt; &lt;copy includeemptydirs="false" todir="${build.dir}"&gt; &lt;fileset dir="${src.dir}"&gt; &lt;exclude name="**/*.launch"/&gt; &lt;exclude name="**/*.java"/&gt; &lt;/fileset&gt; &lt;/copy&gt; &lt;/target&gt; &lt;target name="clean"&gt; &lt;delete dir="${build.dir}"/&gt; &lt;/target&gt; &lt;target name="cleanall" depends="clean"/&gt; &lt;target name="build" depends="init"&gt; &lt;echo message="${ant.project.name}: ${ant.file}"/&gt; &lt;javac debug="true" debuglevel="${debuglevel}" destdir="bin" source="${source}" target="${target}" classpathref="project.classpath"&gt; &lt;src path="${src.dir}"/&gt; &lt;/javac&gt; &lt;/target&gt; &lt;target name="build-jar" depends="build"&gt; &lt;delete file="${jar.file}" /&gt; &lt;delete file="${manifest.file}" /&gt; &lt;manifest file="${manifest.file}" &gt; &lt;attribute name="built-by" value="${user.name}" /&gt; &lt;attribute name="Main-Class" value="${main.class}" /&gt; &lt;/manifest&gt; &lt;jar destfile="${jar.file}" basedir="${build.dir}" manifest="${manifest.file}"&gt; &lt;fileset dir="${classes.dir}" includes="**/*.class" /&gt; &lt;fileset dir="${lib.dir}" includes="**/*.jar" /&gt; &lt;/jar&gt; &lt;/target&gt; &lt;/project&gt; </code></pre> <p>I then run: ant clean build-jar</p> <p>and a file named seraph.jar is placed in the java/bin/jar-directory. I then try to run this jar using the following command: java -jar bin/jar/seraph.jar</p> <p>The result is this output at the console:</p> <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Logger at no.easyconnect.seraph.core.SeraphCore.&lt;clinit&gt;(SeraphCore.java:23) Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) ... 1 more Could not find the main class: no.easyconnect.seraph.core.SeraphCore. Program will exit. </code></pre> <p>I suspect that I have done something amazingly silly in the build.xml-file and have spent the better part of two days trying variations on the configuration, to no avail. Any help on getting this working is greatly appreciated.</p> <p>Oh, and I'm sorry if I left some crucial information out. This is my first time posting here at SO.</p>
 

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