Hallo everybody!
I'm new member, I'm using hibernate annotation 3.2. I have an error when run my example. I'm implements my example follow document in hibernate annotation 3.2.
This is content of hibernate.cfg.xml

<!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="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:postgresql:hibernate</property>
<property name="connection.username">postgres</property>
<property name="connection.password">postgres</property>

<property name="current_session_context_class">thread</property>
<property name="hbm2ddl.auto">update</property>
<property name="show_sql">false</property>

<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>

<mapping class="ex.Cat"></mapping>
</session-factory>
</hibernate-configuration>

And HibernateUtil file:
import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
sessionFactory = new AnnotationConfiguration()
.buildSessionFactory();
} catch (Throwable ex) {
// Log exception!
throw new ExceptionInInitializerError(ex);
}
}

public static Session getSession()
throws HibernateException {
return sessionFactory.openSession();
}
}

And here is output when run example:
Exception in thread "main" java.lang.ExceptionInInitializerError
at util.HibernateUtil.<clinit>(HibernateUtil.java:14)
at ex.Test.main(Test.java:8)
Caused by: org.hibernate.HibernateException: Hibernate Dialect must be explicitly set
at org.hibernate.dialect.DialectFactory.determineDialect(DialectFactory.java:57)
at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:39)
at org.hibernate.cfg.SettingsFactory.determineDialect(SettingsFactory.java:409)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:119)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1933)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1216)
at util.HibernateUtil.<clinit>(HibernateUtil.java:11)
... 1 more
Anybody help me!
Thanks!