在Hibernate的EmptyInterceptor中注入JPA的实体管理器

我有一个简单的方法可以在“ AuditLogInterceptor”中使用JPA实体管理器执行数据库操作

我创建了下面的类，该类将提供应用程序上下文参考：

@Component("applicationContextProvider")    public class ApplicationContextProvider implements ApplicationContextAware {        private static ApplicationContext context;        public static ApplicationContext getApplicationContext() { return context;        }        @Override        public void setApplicationContext(ApplicationContext ctx) { context = ctx;        }    }

创建的数据访问类：

@Repository("myAuditDAO")public class myAuditDAO<T, ID extends Serializable> {    private final transient Class<T> persistentClass;    protected transient EntityManager entityManager;    @SuppressWarnings("unchecked")    public MyDAO() {        this.persistentClass = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];    }    @PersistenceContext    public final void setEntityManager(final EntityManager entityMgrToSet) {        this.entityManager = entityMgrToSet;    }    public final Class<T> getPersistentClass() {        return persistentClass;    }    public final T findById(final ID theId) {        return entityManager.find(persistentClass, theId);    }    public final void persist(final T entity) {        entityManager.persist(entity);    }    public final void merge(final T entity) {        entityManager.merge(entity);    }}

并在“ AuditLogInterceptor”中使用“ ApplicationContextProvider”来获取“
MyAuditDAO”的引用，该引用具有JPA实体管理器作为在DAO初始化期间注入的属性。现在，借助“ MyAuditDAO”，我可以执行数据库操作。

public class AuditLogInterceptor extends EmptyInterceptor {    @Override      public void postFlush(Iterator iterator) throws CallbackException {      // Here we can get the MyAuditDao reference and can perform persiste/merge options       MyAuditDao myAuditDao = (MyAuditDao ) ApplicationContextProvider.getApplicationContext().getBean("myAuditDao");      //  myAuditDao.persist(myEntity);    }  }