java - Spring如何注入EntityManager和EntityManagerFactory

EntityManagerFactory.createEntityManager();
EntityManagerFactory.createEntityManager(java.util.Map map);

EntityManagerFactory emf = 
javax.persistence.Persistence.createEntityManagerFactory("jpaUnit"); 
EntityManager em = emf.createEntityManager();  


<beans>
<bean id="myEmf" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
<property name="persistenceUnitName" value="myPersistenceUnit"/>
</bean>
</beans>

[http://www.cnblogs.com/beiyeren/archive/2013/01/23/2873210.html][1]