package util;import java.util.ArrayList;import java.util.List;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import org.hibernate.service.ServiceRegistryBuilder;import entity.UserInfo;public class HibernateUtil{  private static SessionFactory sessionFactory;   /** * @return 获取会话工厂 */  public static SessionFactory getSessionFactory()  {    //第一步:读取Hibernate的配置文件  hibernamte.cfg.xml文件    Configuration con=new Configuration().configure();    //第二步:创建服务注册构建器对象，通过配置对象中加载所有的配置信息    ServiceRegistryBuilder regbulider=new ServiceRegistryBuilder().applySettings(con.getProperties());    //创建注册服务    ServiceRegistry reg=regbulider.buildServiceRegistry();    //第三步:创建会话工厂    SessionFactory sessionFactory=con.buildSessionFactory(reg);    return sessionFactory;  }   /** * @return 获取会话对象 */  public static Session getSession()  {     return getSessionFactory().openSession();  }    /** * @param obj 添加数据 * @return */  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)       {           //事物回滚           tran.rollback();       }    }    finally    {        if(session!=null)        {            //关闭session            session.close();        }    }    return result;  }    /** * @return 更新数据  * 参数为修改的主键id对象 */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)           {               //事物回滚               tran.rollback();           }        }        finally        {            if(session!=null)            {                //关闭session                session.close();            }        }        return result;      }       /** * @param c * @param obj  查询一条数据根据主键的id号 * @return */  public static Object get(Class c,int obj)  {        Session session=null;        Object object=null;        try        {            session=getSession();            object=session.get(c,obj);        }        catch (Exception e)        {        }        finally        {            if(session!=null)            {                //关闭session                session.close();            }        }        return object;  }  /** * @param obj * @return 删除数据 */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)           {               //事物回滚               tran.rollback();           }        }        finally        {            if(session!=null)            {                //关闭session                session.close();            }        }        return result;  }  /** * @param 
     
       查询多条记录 * @param sql  sql语句 * @param param 参数数组 * @return */ @SuppressWarnings("unchecked")public static 
      
        List
       
         query(String sql,String[] param)  {      List
        
          list=new ArrayList
         
          ();      Session session=null;       try        {            session=getSession();            Query query=session.createQuery(sql);            if(param!=null)            {                for(int i=0;i
          
            * @param sql * @param param * @param page * @param size * @return 实现分页查询 */@SuppressWarnings("unchecked")public static 
           
             List
            
              queryByPage(String sql,String[] param,int page,int size) { List
             
               list=new ArrayList
              
               (); Session session=null; try { session=getSession(); Query query=session.createQuery(sql); if(param!=null) { for(int i=0;i