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

<hibernate-mapping>

    <class name="be.cityform.administration.domain.Administrateur" table="administrateur">
      <id name="id" column="id_admin" type="java.lang.Integer" access="field">
         <generator class="identity"/>
      </id>

      <property name="login"      column="identifiant"    type="java.lang.String" />
      <property name="password"    column="password"       type="java.lang.String" />
      <property name="nom"         column="nom"          type="java.lang.String" />
      <property name="prenom"    column="prenom"       type="java.lang.String" />
    </class>

</hibernate-mapping>

package be.cityform.administration.utils;

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

public class HibernateSessionFactory {

    private static final SessionFactory sessionFactory;

    static {
        try {
            // Create the SessionFactory
            sessionFactory = new Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static final ThreadLocal session = new ThreadLocal();

    public static Session currentSession() {
        Session s = (Session) session.get();
        // Open a new Session, if this Thread has none yet
        if (s == null) {
            s = sessionFactory.openSession();
            session.set(s);
        }
        return s;
    }

    public static void closeSession() {
        Session s = (Session) session.get();
        if (s != null)
            s.close();
        session.set(null);
    }

}

[b][u]description[/b][/u] The server encountered an internal error () that prevented it from fulfilling this request.

[b][u]exception[/b][/u]

javax.servlet.ServletException: Servlet execution threw an exception
   org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)

[b][u]root cause[/b][/u]

java.lang.ExceptionInInitializerError
   be.cityform.administration.utils.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:21)
   be.cityform.administration.HibernateTest.doGet(HibernateTest.java:21)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
   org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)

package be.cityform.administration;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.hibernate.Session;
import org.hibernate.Transaction;

import be.cityform.administration.domain.Administrateur;
import be.cityform.administration.utils.HibernateSessionFactory;

public class HibernateTest extends HttpServlet {

   private static final long serialVersionUID=0;
   
   public void doGet(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {
      Session session = HibernateSessionFactory.currentSession();
      Transaction tx = session.beginTransaction();
      Administrateur admin0 = new Administrateur(0,"test1","test2","test3","test4");
      session.save(admin0);
      tx.commit();
      HibernateSessionFactory.closeSession();
   }

}