hibernate xml配置和@注解配置关系映射

package com.newer.db; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.cfg.AnnotationConfiguration; import org.hibernate.cfg.Configuration; /** * MyEclipse自动生成 工具类 */ public class HibernateSessionFactory { private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml"; //位置src private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>(); private static org.hibernate.SessionFactory sessionFactory; private static String configFile = CONFIG_FILE_LOCATION; //private static Configuration configuration = new Configuration(); //XML配置时使用 private static Configuration configuration = new AnnotationConfiguration(); //@配置时使用 static { try { configuration.configure(configFile); sessionFactory = configuration.buildSessionFactory(); } catch (Exception e) { System.err .println("%%%% Error Creating SessionFactory %%%%"); e.printStackTrace(); } } /** * 构造方法 */ private HibernateSessionFactory() { } /** * 获取Session的方法 * @return */ public static Session getSession() throws HibernateException { Session session = (Session) threadLocal.get(); if (session == null || !session.isOpen()) { if (sessionFactory == null) { rebuildSessionFactory(); } session = (sessionFactory != null) ? sessionFactory.openSession() : null; threadLocal.set(session); } return session; } public static void rebuildSessionFactory() { try { configuration.configure(configFile); sessionFactory = configuration.buildSessionFactory(); } catch (Exception e) { System.err .println("%%%% Error Creating SessionFactory %%%%"); e.printStackTrace(); } } public static void closeSession() throws HibernateException { Session session = (Session) threadLocal.get(); threadLocal.set(null); if (session != null) { session.close(); } } /** * 获取sessionFactory的方法 * @return */ public static org.hibernate.SessionFactory getSessionFactory() { return sessionFactory; } /** * 清空 sessionFactory 的方法 * @return */ public static void setConfigFile(String configFile) { HibernateSessionFactory.configFile = configFile; sessionFactory = null; } /** * 获取 configuration 的方法 * @return */ public static Configuration getConfiguration() { return configuration; } }