从Spring
3.1开始，您还可以选择完全忘记persistence.xml，并
EntityManagerFactory使用
packagesToScan属性进行配置，如下所示：
<bean id="entityManagerFactory" p:dataSource-ref="dataSource" p:packagesToScan="${jpa.entity.packages}"> <property name="jpaVendorAdapter"> <bean p:showSql="${hibernate.show_sql}"/> </property> <property name="jpaProperties"> <props> <prop key="hibernate.format_sql">${hibernate.format_sql}</prop> <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop> </props> </property></bean>
