如何提高Hibernate 3 启动速度

package  net.netbauds.catalina;

import  org.hibernate.cfg.Configuration;

public   interface  IHibernateCachableFileLoad {

     public   void  addMappings(Configuration conf);

}

package  net.netbauds.catalina;

import  org.hibernate.SessionFactory;
import  org.hibernate.cfg.Configuration;

//  单态的 sessionFactory
public   class  HibernateSessionFactory {
     PRivate   static  SessionFactory sessionFactory;

     public   static  SessionFactory getSessionFactory() {
         //  不要从 JNDI中获取SessionFactory, 使用一个静态的 SessionFactory
         if  (sessionFactory  ==   null ) {
            Configuration conf  =   new  Configuration();

             try  {

                Class klass  =  Class.forName( " config.HibernateCachableFileLoad " );

                IHibernateCachableFileLoad hibConf  =  (IHibernateCachableFileLoad) klass.newInstance();

                hibConf.addMappings(conf);

            }  catch  (ClassNotFoundException e) {
                 //  NOOP
            }  catch  (InstantiationException e) {
                 //  NOOP
            }  catch  (IllegalaccessException e) {
                 //  NOOP
            }
 
            Configuration confdone  =  conf.configure();

             if (confdone  !=   null ) {
                 //  Use default hibernate.cfg.xml
                sessionFactory  =  confdone.buildSessionFactory();
            }
        }

         return  sessionFactory;
    }
}