Hibernate && NetBeans

javax.servlet.ServletException: org.hibernate.HibernateException: No CurrentSessionContext configured!
	org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)


cause m�re 

org.hibernate.HibernateException: No CurrentSessionContext configured!
	org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:542)
	com.hibernate.utils.FindUser.getInfoUser(FindUser.java:21)
	action.struts.LoginAction.execute(LoginAction.java:31)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

<?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>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/yassine</property>
    <property name="hibernate.connection.username">root</property>
     <mapping resource="client.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

package com.hibernate.utils;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */




import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.SessionFactory;

/**
 * Hibernate Utility class with a convenient method to get Session Factory object.
 *
 * @author yassinert
 */
public class HibernateUtil {
    private static final SessionFactory sessionFactory;

    static {
        try {
            // Create the SessionFactory from standard (hibernate.cfg.xml) 
            // config file.
            sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            // Log the exception. 
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}

package com.hibernate.utils;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */


import java.util.Iterator;
import org.hibernate.*;
import objets.User;

/**
 *
 * @author yassinert
 */
public class FindUser {
    public User getInfoUser(String _login, String _password)throws HibernateException{
	
        User user =new User();
        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
        session.beginTransaction();
		String query = "select c.nom, c.prenom from client c where c.login='" + _login + "' and c.passe='"+ _password +"'";

        Iterator results = session.createSQLQuery(query).list().iterator();
		String nom=null;
		String prenom=null;
		while(results.hasNext())
		{
			Object[] row = (Object[]) results.next();
			nom = (String) row[0];
			prenom = (String) row[1];
		}

        user.setNom(nom);
		user.setPrenom(prenom);
		session.getTransaction().commit();
		HibernateUtil.getSessionFactory().close();
		return user;

    }