This is a hibernate.cfg.xml for posgresql and it will help you with basic hibernate configurations for posgresql.
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
<property name="hibernate.connection.username">postgres</property>
<property name="hibernate.connection.password">password</property>
<property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/hibernatedb</property>
<property name="connection_pool_size">1</property>
<property name="hbm2ddl.auto">create</property>
<property name="show_sql">true</property>
<mapping class="org.javabrains.sanjaya.dto.UserDetails"/>
</session-factory>
</hibernate-configuration>