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hibernate的SessionManager

 

 1 import  org.apache.commons.logging.Log;
  2 import  org.apache.commons.logging.LogFactory;
  3 import  org.hibernate.FlushMode;
  4 import  org.hibernate.HibernateException;
  5 import  org.hibernate.Session;
  6 import  org.hibernate.SessionFactory;
  7 import  org.hibernate.Transaction;
  8 import  org.hibernate.cfg.Configuration;
  9
10
11
12 public   class  SessionManager  {
 13      private   static  Log log  =  LogFactory.getLog(SessionManager. class );
 14      private   static   final  SessionFactory sessionFactory;
 15      /** 静态块：创建session factory */
16      static   {
 17          try   {
 18             System.out.println( " 数据映射初始化begin " );
 19             Configuration configure  =   new  Configuration().configure();
 20             sessionFactory  = configure.buildSessionFactory();
 21              /* URL configFileURL =
 22                     SessionManager.class.getResource("/hibernate.cfg.xml");
 23             Configuration configure = (new Configuration()).configure(configFileURL); */
24             System.out.println( " 数据映射初始化end " );
 25         }   catch  (Throwable ex)  {
 26             log.error( " Initial SessionFactory creation failed. " , ex);
 27              throw   new  ExceptionInInitializerError(ex);
 28         }
29     }
30      /** 获取当前线程的session对象 */
31      public   static  Session currentSession()  throws  HibernateException  {
 32         Session s  =  sessionFactory.openSession();
 33         s.setFlushMode(FlushMode.NEVER);
 34          return  s;
 35     }
36      public   static  Session currentSessionFlush()  throws  HibernateException  {
 37         Session s  =  sessionFactory.openSession();
 38         s.setFlushMode(FlushMode.AUTO);
 39          return  s;
 40     }
41      /** 关闭当前线程所在的session对象 */
42      public   static   void  closeSession(Session s)  throws  HibernateException  {
 43          if  (s  !=   null ) {
 44             s.close();
 45         }
46     }
47      public   static  SessionFactory getSessionFactory()  {
 48          if (sessionFactory != null ) {
 49              return  sessionFactory;
 50         }
51          else {
 52             System.out.println( " 无效的factiory " );
 53              return   null ;
 54         }
55     }
56 }
57
posted on 2007-09-03 09:23 crazy 阅读(386) 评论(0)  编辑  收藏 所属分类: hibernate

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