Spring+Hibernate, Autowire sessionFactory into hibernate DAO

Did you declare sessionFactory bean?

<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation">
<value>file:src/hibernate.cfg.xml</value>
</property>
</bean>

I think your problem is @Autowired

@Autowired
private SessionFactory sessionFactory;