Hibernate自动生成表

以下代码可以实现生成表：

package test;         

import java.io.File;          
import org.hibernate.HibernateException;    
import org.hibernate.Session;     
import org.hibernate.SessionFactory;     
import org.hibernate.Transaction;     
import org.hibernate.cfg.Configuration;     
import org.hibernate.tool.hbm2ddl.SchemaExport;  
       
 public class HibernateSchemaExport ...{              
     
     static Session session;              
     
     static Configuration config = null;         
   
     static Transaction tx = null;        
      
   public static void main(String[] args) ...{            
      /** 
       * 根据映射文件创建数据库结构             
     */            
        try ...{                 
           config = new Configuration().configure(new File(                         "src/hibernate.cfg.xml"));   
             
          System.out.println("Creating tables...");  
              
          SessionFactory sessionFactory = config.buildSessionFactory();                 

        session = sessionFactory.openSession();                

         tx = session.beginTransaction();                     

        SchemaExport schemaExport = new SchemaExport(config);                  

       schemaExport.create(true, true);    

         System.out.println("Table created.");                       
         
        tx.commit();         
          
     } catch (HibernateException e) ...{   

               e.printStackTrace();               

              try ...{                     

                     tx.rollback();    
              
            } catch (HibernateException e1) ...{    

                  e1.printStackTrace();                 

      }  
            
  } finally ...{  
           
      }   
     
  }     
 
    }