Web Service java.lang.NoClassDefFoundError: org/hibernate/cfg/Configuration

Question

I have built a EAR file (using ANT build.xml from eclipse) and deploy it to WebLogic server, when I test the web service with a Test Client, I will receive the exception:
java.lang.NoClassDefFoundError: org/hibernate/cfg/Configuration
Anything wrong with my build.xml file below? Why I get this exception?
<?xml version="1.0" encoding="UTF-8"?>
<project name="MyWebServices" default="all">  
     <!-- set global properties for this build -->   
     <property name="wls.username" value="weblogic" />   
     <property name="wls.password" value="abcd1234" />   
     <property name="wls.hostname" value="localhost" />   
     <property name="wls.port" value="7001" />   
     <property name="wls.server.name" value="AdminServer" />   
     <property name="ear.deployed.name" value="MyWebServicesEar" />
     <property name="example-output" value="output" />   
     <property name="ear-dir" value="${example-output}/MyWebServicesEar" />   
     <property name="clientclass-dir" value="${example-output}/clientclasses" />   
     <path id="client.class.path">       
          <pathelement path="${clientclass-dir}" />       
          <pathelement path="${java.class.path}" />   
     </path>
     <taskdef name="jwsc" classname="weblogic.wsee.tools.anttasks.JwscTask" />   
     <taskdef name="clientgen" classname="weblogic.wsee.tools.anttasks.ClientGenTask" />   
     <taskdef name="wldeploy" classname="weblogic.ant.taskdefs.management.WLDeploy" />
     <target name="build-service">       
          <jwsc srcdir="src" destdir="${ear-dir}">
               <classpath>      
                    <pathelement path="${java.class.path}" />
                    <pathelement path="WebContent/WEB-INF/lib"/>
               </classpath>
               <module contextPath="MyWebServices" name="MyWebServicesModule">
                    <jws file="/hk/com/my/webservices/servicefacade/CustomerWS.java" type="JAXWS" />                 
                    <jws file="/hk/com/my/webservices/servicefacade/LoginWS.java" type="JAXWS" />               
                    <jws file="/hk/com/my/webservices/servicefacade/PaymentWS.java" type="JAXWS" />
                    <!-- <jws file="/hk/com/my/webservices/servicefacade/RedemptionWS.java" type="JAXWS" /> -->
               </module>
          </jwsc>
     </target>   
     <target name="deploy">
          <wldeploy action="deploy" name="${ear.deployed.name}" source="${ear-dir}" user="${wls.username}" password="${wls.password}" verbose="true" adminurl="t3://${wls.hostname}:${wls.port}" targets="${wls.server.name}" />   
     </target>   
     <target name="undeploy">       
          <wldeploy action="undeploy" name="${ear.deployed.name}" failonerror="false" user="${wls.username}" password="${wls.password}" verbose="true" adminurl="t3://${wls.hostname}:${wls.port}" targets="${wls.server.name}" />   
     </target>         
     <target name="all" depends="clean,build-service,deploy" />
     <target name="clean" depends="undeploy">       
          <delete dir="${example-output}" />   
     </target> 
     <target name="run">       
          <java classname="hk.com.my.webservices.servicefacade.client.Main" fork="true" failonerror="true">
               <classpath refid="client.class.path" />                           
               <arg line="http://${wls.hostname}:${wls.port}/MyServices" />
          </java>   
     </target>
</project>

Answer 1

The problem was because I did not include my web-inf into the ear in my build.xml, i added it using the zipfileset tag and it worked like a charm:
<target name="build-service">          
          <jwsc srcdir="src" destdir="${ear-dir}" debug="on">
               <!-- "contextPath" is like a folder to contain the Web Services, "name" is the name of the WAR file -->
               <module contextPath="MyWebServices" name="MyWebServicesModule">
                    <jws file="/my/webservices/servicefacade/CustomerWS.java" type="JAXWS" />          
                    <jws file="/my/webservices/servicefacade/LoginWS.java" type="JAXWS" />                                                                 
                    <!-- include and copy the required files to the ear directory -->
                    <zipfileset dir="WebContent/WEB-INF/lib" prefix="WEB-INF/lib">
                         <include name="*.jar"/>
                    </zipfileset>                              
               </module>
          </jwsc>
</target>