package com.sample;

import java.util.List;
import java.util.Iterator;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import com.sample.HibernateUtil;

public class Test {

public static void main(String[] args) {
      
      SessionFactory ses = HibernateUtil.getSessionFactory();
      //Long kastenId = obj.saveKasten("Staette");
      //Long kastenId2 = obj.saveKasten("Tiere");
      //obj.listKasten();
   }
}

package com.sample;

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

public class HibernateUtil {

   private static SessionFactory sessionFactory = null;
   
   public static SessionFactory getSessionFactory() {
      if (sessionFactory == null) {
         try {
            sessionFactory = new Configuration().configure().buildSessionFactory();
         } catch (Throwable ex) {
            ex.printStackTrace();
         }
      }
      return sessionFactory;
   }
}

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

<hibernate-configuration>

    <!-- a SessionFactory instance listed as /jndi/name -->
    <session-factory name="java:hibernate/SessionFactory">
        <!-- properties -->
        <property name="dialect">org.hibernate.dialect.DB2Dialect</property>
        <property name="hibernate.connection.driver_class">com.ibm.db2.jcc.DB2Driver</property>
      <property name="hibernate.connection.password">****</property>
        <property name="hibernate.connection.url">*****</property>
        <property name="hibernate.connection.username">****</property>
    </session-factory>

</hibernate-configuration>

Apr 18, 2011 1:26:50 PM org.hibernate.cfg.Environment <clinit>
INFO: Hibernate 3.2.1
java.lang.ExceptionInInitializerError
   at org.hibernate.cfg.Configuration.reset(Configuration.java:168)
   at org.hibernate.cfg.Configuration.<init>(Configuration.java:187)
   at org.hibernate.cfg.Configuration.<init>(Configuration.java:191)
   at com.sample.HibernateUtil.getSessionFactory(HibernateUtil.java:13)
   at com.sample.Test.main(Test.java:110)
Caused by: java.lang.NullPointerException
   at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
   at org.hibernate.cfg.Environment.<clinit>(Environment.java:515)
   ... 5 more