hibernate_one_to_one映射简单入门例子

/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package factory; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.cfg.Configuration; /** * * @author wlshi */ public class HibernateSessionFactory { //读取配置文件 private static String CONFIG_FILE_LOCATION="/hibernate.cfg.xml"; private static final ThreadLocal<Session> threadLocal=new ThreadLocal<Session>(); private static Configuration configuration =new Configuration(); private static org.hibernate.SessionFactory sessionFactory; private static String configFile=CONFIG_FILE_LOCATION; static{ try{ configuration.configure(configFile); sessionFactory=configuration.buildSessionFactory(); }catch(Exception e){ System.err.println("%%%% Error Creating SessionFactory %%%%"); e.printStackTrace(); } } private HibernateSessionFactory(){//无参构造方法 } /** * 获得Session方法 * */ 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(); } } /** *关闭Hibernate的Session * */ public static void closeSession()throws HibernateException{ Session session=(Session)threadLocal.get(); threadLocal.set(null); if(session!=null){ session.close(); } } /** * 给Configuration赋值的方法 * * Session Factory在接下来的调用将被重建 */ public static void setConfigFile(String configFile){ HibernateSessionFactory.configFile=configFile; sessionFactory=null; } /** * 获得Session Factory的方法 * */ public static org.hibernate.SessionFactory getSessionFactory(){ return sessionFactory; } /** * 获得Hibernate Configuration的方法 * */ public static Configuration getConfigration(){ return configuration; } }