import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor; //导入依赖的package包/类
@Before
public void setUp() throws Exception {
	factory = mock(EntityManagerFactory.class);
	manager = mock(EntityManager.class);
	tx = mock(EntityTransaction.class);

	JpaTransactionManager tm = new JpaTransactionManager(factory);
	tt = new TransactionTemplate(tm);

	given(factory.createEntityManager()).willReturn(manager);
	given(manager.getTransaction()).willReturn(tx);
	given(manager.isOpen()).willReturn(true);

	bean = new EntityManagerHoldingBean();
	@SuppressWarnings("serial")
	PersistenceAnnotationBeanPostProcessor pabpp = new PersistenceAnnotationBeanPostProcessor() {
		@Override
		protected EntityManagerFactory findEntityManagerFactory(String unitName, String requestingBeanName) {
			return factory;
		}
	};
	pabpp.postProcessPropertyValues(null, null, bean, "bean");

	assertTrue(TransactionSynchronizationManager.getResourceMap().isEmpty());
	assertFalse(TransactionSynchronizationManager.isSynchronizationActive());
}
 

import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor; //导入依赖的package包/类
/**
 * Bean that helps Spring to understand JPA annotations
 * @return Bean
 */
@Bean
public PersistenceAnnotationBeanPostProcessor paPostProcessor(){
    return new PersistenceAnnotationBeanPostProcessor();
}
 

import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor; //导入依赖的package包/类
@Bean
public static PersistenceAnnotationBeanPostProcessor persistenceAnnotationBeanPostProcessor() {
	return new PersistenceAnnotationBeanPostProcessor();
}
 

import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor; //导入依赖的package包/类
@Bean
public PersistenceAnnotationBeanPostProcessor persistenceAnnotation() {
    return new PersistenceAnnotationBeanPostProcessor();
}
 

import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor; //导入依赖的package包/类
@Bean
public static PersistenceAnnotationBeanPostProcessor persistenceAnnotationBeanPostProcessor() {
    return new PersistenceAnnotationBeanPostProcessor();
}
 

import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor; //导入依赖的package包/类
/**
 * It’s important to understand that @PersistenceUnit and @PersistenceContext aren’t Spring annotations;<br>
 * they’re provided by the JPA specification. In order for Spring to understand them and inject an EntityManagerFactory or EntityManager,<br>
 * Spring’s PersistenceAnnotationBeanPostProcessor must be configured. <br>
 * If you’re already using <context:annotation-config> or <context:component-scan>,<br>
 * then you’re good to go because those configuration elements automatically register a PersistenceAnnotationBeanPostProcessor bean.
 *
 * @return PersistenceAnnotationBeanPostProcessor
 */

@Bean
public PersistenceAnnotationBeanPostProcessor paPostProcessor() {
    return new PersistenceAnnotationBeanPostProcessor();
}