java - compiling ant build and running jar -

hi i'm trying create ant build can run command prompt. when run jar file containing main method this:

 exception in thread "main" java.lang.noclassdeffounderror: com/fmd/raptorurls/raptorurls     caused by: java.lang.classnotfoundexception: com.fmd.raptorurls.raptorurls             @ java.net.urlclassloader$1.run(unknown source)             @ java.security.accesscontroller.doprivileged(native method)             @ java.net.urlclassloader.findclass(unknown source)             @ java.lang.classloader.loadclass(unknown source)             @ sun.misc.launcher$appclassloader.loadclass(unknown source)             @ java.lang.classloader.loadclass(unknown source)             @ java.lang.classloader.loadclassinternal(unknown source)     not find main class: com.fmd.raptorurls.raptorurls. program exit. 

here ant build:

<?xml version="1.0"?>     <project name="raptorurlcheck" basedir="." default="cleandistfiles">     <tstamp>     <format property="currentyear" pattern="yyyy" />     </tstamp>      <!-- =================================================================== -->     <!-- global properties - define in build.properties                      -->     <!-- =================================================================== -->     <property file="build.properties" />      <!-- =================================================================== -->     <!-- paths                                                               -->     <!-- =================================================================== -->     <path id="runtime-libs">     <fileset dir="${lib.dir}">         <include name="**/*.jar" />     </fileset>     </path>      <path id="manifest-classpath">     <fileset dir="${lib.dir}">         <include name="**/*.jar" />     </fileset>     </path>      <manifestclasspath property="jar.classpath" jarfile="${lib.dir}/${project.name}.jar" >     <classpath refid="manifest-classpath" />     </manifestclasspath>      <target name="clean" >     <echo>***** deleting files ${project.name} *****</echo>     <delete failonerror="false" dir="${bin.dir}" />     <delete failonerror="false" dir="${dist.dir}" />     <delete failonerror="false" dir="${log.dir}" />     <delete failonerror="false" dir="${conf.dir}" />     </target>      <target name="init" depends="clean">     <echo>***** creating required directories ${project.name} build *****</echo>     <tstamp />     <mkdir dir="${bin.dir}" />     <mkdir dir="${dist.dir}" />     <mkdir dir="${log.dir}" />     <mkdir dir="${conf.dir}" />     </target>      <target name="compile" depends="init" >     <echo>***** compiling source files ${project.name} *****</echo>     <!--this javac compiles java/src directory-->     <javac srcdir="${src.dir}" includeantruntime="false" destdir="${bin.dir}" debug="on" debuglevel="lines,var,source">         <include name="**/*.java" />         <classpath refid="runtime-libs" />     </javac>      <copy todir="${bin.dir}">         <fileset dir="${src.dir}">         <include name="**/*.html" />         <include name="**/*.css" />         </fileset>         <fileset dir="${config.dir}">         <include name="*-.xml" />         <include name="*.xsd" />         <include name="*.properties" />         </fileset>     </copy>     </target>      <target name="jar" depends="compile" description="packages app jar" >     <echo>***** creating jar distribution ${project.name} *****</echo>     <jar destfile="${lib.dir}/${project.name}.jar">         <manifest>         <attribute name="class-path" value="${jar.classpath}" />         <attribute name="built-by" value="${user.name}" />         <attribute name="main-class" value="${main.class}" />         </manifest>         <fileset dir="${bin.dir}">         <include name="**/*.class*" />         <include name="**/*.xml" />         <include name="**/*.html" />         <include name="**/*.css" />         <include name="**/*.properties" />         </fileset>         <fileset dir="${config.dir}">         <include name="**/*.xml" />         <include name="**/*.xsd" />         </fileset>     </jar>     </target>      <target name="copydistfiles" depends="jar">     <echo>***** copying distribution files ${project.name} *****</echo>     <mkdir dir="${dist.dir.lib}" />     <mkdir dir="${dist.dir.conf}" />     <mkdir dir="${dist.dir.log}" />     <copy todir="${dist.dir.lib}">         <fileset dir="${lib.dir}" excludes="*.db" />     </copy>     <copy todir="${dist.dir.conf}">         <fileset dir="${conf.dir}" />     </copy>     </target>      <target name="zip" depends="copydistfiles">     <echo>***** zipping distribution files ${project.name} *****</echo>     <zip destfile="./linux_5.5_${project.name}.zip" basedir="${dist.dir}" excludes="*.db" />     </target>      <target name="cleandistfiles" depends="zip">     <echo>***** deleting distribution files ${project.name} *****</echo>     <delete dir="${dist.dir}/lib" />     <delete dir="${dist.dir.conf}" />     <delete dir="${dist.dir}/log" />     </target> </project> 

and here build properties:

  project.name=${ant.project.name}     app.dir=${basedir}     src.dir=${basedir}/src     lib.dir=${basedir}/lib     log.dir=${basedir}/logs     conf.dir=${basedir}/config     bin.dir=./bin     bin.dir.lib=${bin.dir}/lib     dist.dir=./dist     dist.dir.conf=${dist.dir}/config     dist.dir.lib=${dist.dir}/lib     dist.dir.log=${dist.dir}/logs     main.class=com.fmd.raptorurls.raptorurls     spring.config.dir=./lib     config.dir=./config/     all.config.dir=./apps/fps/raptorurls/config     build_env=all 

don't know doing wrong. i'm using spring

a noclassdeffounderror (distinct classnotfoundexception) may indicate a number of things. start, guess when execute main class, dependency missing. check runtime classpath. libs need present?