Hibernate之工具類HibernateUtil

原創文章，轉載請注明：Hibernate之工具類HibernateUtil??By Lucio.Yang

1.最簡單的工具類，實現SessionFactory的單例共享，session的管理

package com.cc.hibernate;import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;public class HibernateUtil {//創建工廠類，是靜態的單例的，只能被賦值一次private static final SessionFactory sessionFactory=buildSessionFactory();/** init sessionFactory */private static SessionFactory buildSessionFactory(){SessionFactory sessionFactory=null;try{//configure函數里面可以寫hibernate的配置文件，空則默認為hibernate.cfg.xmlConfiguration configuration=new Configuration().configure();ServiceRegistry serviceRegistry=new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();sessionFactory= configuration.buildSessionFactory(serviceRegistry);}catch(Throwable te){System.err.println("init sessionFactory Error:"+te);te.printStackTrace();}return sessionFactory;}/** get session */public static Session getSession(){//得到sessionSession session=sessionFactory.openSession();return session;}
}

2.將常見事務方法封裝進工具類

添加如下方法：

//刪除
public static boolean delete(Object obj){  Session session=null;  Transaction tran=null;  boolean result=false;  try{  session=getSession();  tran=session.beginTransaction();  session.delete(obj);  tran.commit();  result=true;  }  catch (Exception e){  if(tran!=null){  //事物回滾  
            tran.rollback();  }  }  finally{  if(session!=null){  //關閉session  
            session.close();  }  }  return result;  
} 
//更新
public static boolean update(Object object)  
{  Session session=null;  Transaction tran=null;  boolean result=false;  try{  session=getSession();  tran=session.beginTransaction();  session.update(object);  tran.commit();  result=true;  }  catch (Exception e){  if(tran!=null){  //事物回滾  
            tran.rollback();  }  }  finally{  if(session!=null){  //關閉session  
            session.close();  }  }  return result;  
} 
//增加
public static boolean add(Object obj){  Session session=null;  Transaction tran=null;  boolean result=false;  try{  session=getSession();  tran=session.beginTransaction();  session.save(obj);  tran.commit();  result=true;  }  catch (Exception e){  if(tran!=null){  //事物回滾  
           tran.rollback();  }  }  finally  {  if(session!=null){  //關閉session  
            session.close();  }  }  return result;  
}
//執行sql語句，返回單條記錄
public static Object queryOne(String sql,String[] param){  Object object=null;  Session session=null;  try{  session=getSession();  Query query=session.createQuery(sql);  if(param!=null){  for(int i=0;i<param.length;i++){  query.setString(0,param[i]);      }  object=query.uniqueResult();  }  }  catch (Exception e){  }  finally{  if(session!=null){  session.close();  }  }  return object;  
}   

參考：http://blog.csdn.net/hanhan313/article/details/8125924