hibernate - ClassNotFound : javax.persistence.Persistence when creating entity Manager Factory -

i working on project jsf , hibernate.

i divided project 3 layers (view, service, dao)

in service layer creating instance of dao class, when reaching persistence.createentitymanagerfactory("e_gym") throws exception, see below blocks

public abstract class basedao<t> implements serializable {     private static final long serialversionuid = 1l;      //the next line #18     private static final entitymanagerfactory emf = persistence.createentitymanagerfactory("e_gym"); 

//.... }

public class techniqueservice implements serializable {     private static final long serialversionuid = -853877188695729368l;      private techniquedao techniquedao = new techniquedao();      public techniqueservice() {}     //crud service methods... } 

here persistence.xml file:

<?xml version="1.0" encoding="utf-8"?> 

http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

<persistence-unit name="e_gym" transaction-type="resource_local">     <provider>org.hibernate.ejb.hibernatepersistence</provider>      <properties>         <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.driver" />        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/e_gym" />          <property name="javax.persistence.jdbc.user" value="root" />         <property name="javax.persistence.jdbc.password" value="root" />         <property name="hibernate.show_sql" value="true" />          <property name="hibernate.connection.shutdown" value="true" />         <property name="hibernate.dialect" value="org.hibernate.dialect.mysqldialect" />      </properties> </persistence-unit> 

but facing exception :

java.lang.classnotfoundexception: javax.persistence.persistence @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1720) @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1571) @ nassar.apps.orm.dao.basedao.<clinit>(basedao.java:18) @ nassar.apps.gym.services.techniqueservice.<init>(techniqueservice.java:12) @ nassar.apps.gym.views.techniquesview.gettechniqueservice(techniquesview.java:90) @ nassar.apps.gym.views.techniquesview.filltechniques(techniquesview.java:41) @ nassar.apps.gym.views.techniquesview.<init>(techniquesview.java:26) @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method) @ sun.reflect.nativeconstructoraccessorimpl.newinstance(unknown source) @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(unknown source) @ java.lang.reflect.constructor.newinstance(unknown source) @ java.lang.class.newinstance(unknown source) @ com.sun.faces.mgbean.beanbuilder.newbeaninstance(beanbuilder.java:186) @ com.sun.faces.mgbean.beanbuilder.build(beanbuilder.java:100) @ com.sun.faces.mgbean.beanmanager.createandpush(beanmanager.java:409) @ com.sun.faces.mgbean.beanmanager.create(beanmanager.java:269) @ com.sun.faces.el.managedbeanelresolver.resolvebean(managedbeanelresolver.java:244) @ com.sun.faces.el.managedbeanelresolver.getvalue(managedbeanelresolver.java:116) @ com.sun.faces.el.demuxcompositeelresolver._getvalue(demuxcompositeelresolver.java:176) @ com.sun.faces.el.demuxcompositeelresolver.getvalue(demuxcompositeelresolver.java:203) @ org.apache.el.parser.astidentifier.getvalue(astidentifier.java:71) @ org.apache.el.parser.astvalue.getvalue(astvalue.java:160) @ org.apache.el.valueexpressionimpl.getvalue(valueexpressionimpl.java:184) @ com.sun.faces.facelets.el.tagvalueexpression.getvalue(tagvalueexpression.java:109) @ javax.faces.component.componentstatehelper.eval(componentstatehelper.java:194) @ javax.faces.component.componentstatehelper.eval(componentstatehelper.java:182) @ javax.faces.component.uidata.getvalue(uidata.java:732) @ org.primefaces.component.datatable.datatable.getvalue(datatable.java:1002) @ org.primefaces.component.api.uidata.getdatamodel(uidata.java:629) @ javax.faces.component.uidata.getrowcount(uidata.java:356) @ org.primefaces.component.api.uidata.calculatefirst(uidata.java:175) @ org.primefaces.component.datatable.datatablerenderer.prerender(datatablerenderer.java:110) @ org.primefaces.component.datatable.datatablerenderer.encodeend(datatablerenderer.java:82) @ javax.faces.component.uicomponentbase.encodeend(uicomponentbase.java:924) @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1863) @ javax.faces.render.renderer.encodechildren(renderer.java:176) @ javax.faces.component.uicomponentbase.encodechildren(uicomponentbase.java:894) @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1856) @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1859) @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1859) @ com.sun.faces.application.view.faceletviewhandlingstrategy.renderview(faceletviewhandlingstrategy.java:443) @ com.sun.faces.application.view.multiviewhandler.renderview(multiviewhandler.java:131) @ com.sun.faces.lifecycle.renderresponsephase.execute(renderresponsephase.java:120) @ com.sun.faces.lifecycle.phase.dophase(phase.java:101) @ com.sun.faces.lifecycle.lifecycleimpl.render(lifecycleimpl.java:219) @ javax.faces.webapp.facesservlet.service(facesservlet.java:647) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:303) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208) @ org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:52) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:241) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208) @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:220) @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:122) @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:505) @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:170) @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:103) @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:957) @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:116) @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:423) @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1079) @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:620) @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:316) @ java.util.concurrent.threadpoolexecutor.runworker(unknown source) @ java.util.concurrent.threadpoolexecutor$worker.run(unknown source) @ org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run(taskthread.java:61) @ java.lang.thread.run(unknown source) 

any appreciated...

thanks guys. found error. grouping hibernate jars inside folder inside lib, below.

webcontent/web-inf/lib/hibernate-2/[list of required jars], below

so moving jars directly under lib folder fixed problem. or think adding hibernate folder deployment assemply project properties fix problem also.