Duvidas com hibernate

<!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="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.url">jdbc:mysql://localhost/hibernate?autoReconnect=true</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password"></property>
		
		<!-- JDBC connection pool (use the built-in) -->
		<property name="connection.pool_size">1</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.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>

		<mapping resource="br.gov.struts.actions.AutenticarUser.hbm.xml" />

	</session-factory>
</hibernate-configuration>