This will show you the generated SQL, but will not show you the values contained within the queries.
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="hibernateProperties">
<props>
<!-- show the sql without the parameters -->
<prop key="hibernate.show_sql">true</prop>
<!-- format the sql nice -->
<prop key="hibernate.format_sql">true</prop>
<!-- show the hql as comment -->
<prop key="use_sql_comments">true</prop>
</props>
</property>
</bean>