Exception in thread "main" java.lang.ExceptionInInitializerError
   at hibernatePersonne.InitSessionFactory.<clinit>(InitSessionFactory.java:16)
   at hibernatePersonne.Test.createPersonne(Test.java:100)
   at hibernatePersonne.Test.main(Test.java:26)
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@ca8327 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category) (Caused by org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@ca8327 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category))
   at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
   at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
   at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
   at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
   at org.hibernate.cfg.Configuration.<clinit>(Configuration.java:126)
   ... 3 more
Caused by: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@ca8327 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category)
   at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:413)
   at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
   ... 7 more
Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Category
   at java.lang.Class.getDeclaredConstructors0(Native Method)
   at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
   at java.lang.Class.getConstructor0(Unknown Source)
   at java.lang.Class.getConstructor(Unknown Source)
   at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
   ... 8 more
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Category
   at java.net.URLClassLoader$1.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.net.URLClassLoader.findClass(Unknown Source)
   at java.lang.ClassLoader.loadClass(Unknown Source)
   at java.lang.ClassLoader.loadClass(Unknown Source)
   at java.lang.ClassLoader.loadClassInternal(Unknown Source)
   ... 13 more

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
  "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory   name="factory">

<!-- local connection properties -->
      <property name="hibernate.connection.url">jdbc:oracle:thin:@127.0.0.1:1521:arabsoft</property>
      <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
      <property name="hibernate.connection.username">gmao</property>
      <property name="hibernate.connection.password">gmao</property>
      <!-- property name="hibernate.connection.pool_size"></property -->

      <!-- dialect for oracle -->
      
        <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>

<property  name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
   
   
    <!--  thread is the short name for
      org.hibernate.context.ThreadLocalSessionContext
      and let Hibernate bind the session automatically to the thread
    -->
    <property name="current_session_context_class">thread</property>
   
    <!-- this will show us all sql statements -->
        <property name="hibernate.show_sql">true</property>

<!-- mapping files -->
<mapping resource="hibernatePersonne/Personne.hbm.xml" />
</session-factory>
</hibernate-configuration>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping>

<class name="hibernatePersonne.Personne" table="personne">

        <id name="id"
          column="id"
           type="java.lang.String">
       
         
          </id>
          <property name="nom" 
           column="nom"
           type="java.lang.String" />
           <property name="prenom"
            column="prenom"
            type="java.lang.String" />


</class>
</hibernate-mapping>

package hibernatePersonne;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;


public class InitSessionFactory {
      public static final SessionFactory sessionFactory;

      static {

         try {
   //CréelaSessionFactory
   sessionFactory= new Configuration().configure("./hibernate.cfg.xml").buildSessionFactory();
   }

         catch (HibernateException ex){

            throw new RuntimeException("Problèmedeconfiguration:" + ex.getMessage(), ex);
   }
   }

      public static final ThreadLocal session= new ThreadLocal();

      public static Session currentSession()
      throws HibernateException{
   
      Session s=(Session)session.get();
   //OuvreunenouvelleSession,siceThreadn'enaaucune

      if (s== null) {s = sessionFactory.openSession();
      session.set(s);
       }
       return s;
      }
   public static void closeSession() throws HibernateException{

      Session s=(Session)session.get();
      session.set(null);
      if (s!= null)
      s.close();
      }
      }