HibernateSessionFactoryUtil.java(Hibernate工具类)

package org.company.util;import java.io.Serializable;import org.apache.log4j.Logger;import org.hibernate.HibernateException;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;/** * Configures and provides access to Hibernate sessions, tied to the current * thread of execution. Follows the Thread Local Session pattern, see */@SuppressWarnings("deprecation")public class HibernateSessionFactory{/** * Location of hibernate.cfg.xml file. Location should be on the classpath * as Hibernate uses #resourceAsStream style lookup for its configuration * file. The default classpath location of the hibernate config file is in * the default package. Use #setConfigFile() to update the location of the * configuration file for the current session. */private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";private static final ThreadLocal<Session> sessionThreadLocal = new ThreadLocal<Session>();private static final ThreadLocal<Transaction> transactionThreadLocal = new ThreadLocal<Transaction>();private static Configuration configuration = new Configuration();private static SessionFactory sessionFactory;private static String configFile = CONFIG_FILE_LOCATION;private static Logger logger = Logger.getLogger(HibernateSessionFactory.class);static{try{//Configuration configuration = new Configuration();//configuration.configure();//ServiceRegistryBuilder serviceRegistryBuilder = new ServiceRegistryBuilder();//ServiceRegistry serviceRegistry = serviceRegistryBuilder.buildServiceRegistry();//sessionFactory = configuration.buildSessionFactory(serviceRegistry);configuration.configure(configFile);sessionFactory = configuration.buildSessionFactory();}catch (HibernateException e){logger.error("buildSessionFactory");throw new HibernateException(e);}}private HibernateSessionFactory(){}public static SessionFactory getSessionFactory(){//// Instead of a static variable, use JNDI://SessionFactory sessionFactory = null;//try//{//Context context = new InitialContext();//String jndiName = "java:hibernate/HibernateFactory";//sessionFactory = (SessionFactory) context.lookup(jndiName);//}//catch (NamingException ex)//{//throw new InfrastructureException(ex);//}//return sessionFactory;return sessionFactory;}public static void rebuildSessionFactory(){synchronized (sessionFactory){try{configuration.configure(configFile);sessionFactory = configuration.buildSessionFactory();}catch (HibernateException e){logger.error("rebuildSessionFactory");throw new HibernateException(e);}}}public static Session getSession(){Session session = (Session) sessionThreadLocal.get();try{if (session == null || !session.isOpen()){if (sessionFactory == null){rebuildSessionFactory();}session = (sessionFactory != null) ? sessionFactory.openSession() : null;sessionThreadLocal.set(session);}}catch (HibernateException e){logger.error("openSession");throw new HibernateException(e);}return session;}public static void closeSession(){Session session = (Session) sessionThreadLocal.get();sessionThreadLocal.set(null);try{if (session != null && session.isOpen()){session.close();}}catch (HibernateException e){logger.error("close");throw new HibernateException(e);}}public static void beginTransaction(){Transaction transaction = (Transaction) transactionThreadLocal.get();try{if (transaction == null){transaction = getSession().beginTransaction();transactionThreadLocal.set(transaction);}}catch (HibernateException e){logger.error("beginTransaction");throw new HibernateException(e);}}public static void commitTransaction(){Transaction transaction = (Transaction) transactionThreadLocal.get();try{if (transaction != null && !transaction.wasCommitted() && !transaction.wasRolledBack()){transaction.commit();}transactionThreadLocal.set(null);}catch (HibernateException e){logger.error("commitTransaction");throw new HibernateException(e);}}public static void rollbackTransaction(){Transaction transaction = (Transaction) transactionThreadLocal.get();try{transactionThreadLocal.set(null);if (transaction != null && !transaction.wasCommitted() && !transaction.wasRolledBack()){transaction.rollback();}}catch (HibernateException e){logger.error("rollbackTransaction");throw new HibernateException(e);}finally{closeSession();}}public static void setConfigFile(String configFile){HibernateSessionFactory.configFile = configFile;sessionFactory = null;}public static Configuration getConfiguration(){return configuration;}public static void add(Object entity){try{beginTransaction();getSession().save(entity);commitTransaction();rollbackTransaction();}catch (HibernateException e){logger.error("add");throw new HibernateException(e);}}public static void update(Object entity){try{beginTransaction();getSession().update(entity);commitTransaction();rollbackTransaction();}catch (HibernateException e){logger.error("update");throw new HibernateException(e);}}public static void delete(Object entity){try{beginTransaction();getSession().delete(entity);commitTransaction();rollbackTransaction();}catch (HibernateException e){logger.error("delete");throw new HibernateException(e);}}public static Object get(Class<?> clazz, Serializable id){Object object = null;try{object = getSession().get(clazz, id);}catch (HibernateException e){logger.error("get");throw new HibernateException(e);}finally{closeSession();}return object;}}