hibernate工具类更具配置文件创建table,和创建currentsession..

==============================根据hibernate配置文件(hibernate.cfg.xml和*.hbm.xml文件)创建table

 package org.john.november.util;

import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class ExportDB {

 public static void main(String[] args) {
  
  //读取hibernate.cfg.xml文件
  Configuration cfg = new Configuration().configure();
  
  SchemaExport export = new SchemaExport(cfg);
  
  export.create(true, true);
 }
}
======================hibernate ,获取currentsession工具类==============

package org.john.november.util;

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

public class HibernateUtils {

 private static SessionFactory factory;
 
 static {
  try {
   Configuration cfg = new Configuration().configure();
   factory = cfg.buildSessionFactory();
  }catch(Exception e) {
   e.printStackTrace();
  }
 }
 
 public static SessionFactory getSessionFactory() {
  return factory;
 }
 
 public static Session getSession() {
  return factory.openSession();
 }
 
 public static void closeSession(Session session) {
  if (session != null) {
   if (session.isOpen()) {
    session.close();
   }
  }
 }
}