<?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>

    <!-- Database connection settings -->
    <property name="connection.drive_class">com.mysql.jdbc.Driver</property>
    <property name="connection.url">jdbc:mysql://127.0.0.1:3306/testebanco</property>
    <property name="connection.username">root</property>
    <property name="connection.password">102030</property>

    <!-- JDBC connection pool(use the built-in) -->
    <property name="connection.pool_size">1</property>

    <!-- SQL dialect -->
    <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>

    <!-- Enable Hibernate's automatic session context management -->
    <property name="current_session_context_class">thread</property>

    <!-- Disable the second-level cache -->
    <property     name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

    <!-- Echo all executed SQL to stdout -->
    <property name="show_sql">true</property>

    <!-- Drop and re-create the database schema on startup -->
    <property name="hbm2ddl.auto">create</property>

    <!-- Mapeamento das entidades -->
    <mapping class="teste.DAO.Estado" />

</session-factory>

public class HibernateUtil {
 private static SessionFactory sf = createSessionFactory();

public static SessionFactory getSf() {
    return sf;
}

private static SessionFactory createSessionFactory(){
    try{
        Configuration cfg = new Configuration().configure();

        ServiceRegistry registro = new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build();

        SessionFactory f = cfg.buildSessionFactory(registro);

        return f;
    }catch(Throwable ex){
        System.err.println("Erro ao criar a sessão " + ex);
        throw new ExceptionInInitializerError(ex);
    }

}

public class HibernateUtilTeste {

@Test
public void conectar(){
    Session sessao =  HibernateUtil.getSf().openSession();
    sessao.close();
    HibernateUtil.getSf().close();
}