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 <T> 查询多条记录        * @param sql  sql语句        * @param param 参数数组        * @return        */         @SuppressWarnings("unchecked")        public static <T> List<T> query(String sql,String[] param)          {              List<T> list=new ArrayList<T>();              Session session=null;               try                {                    session=getSession();                    Query query=session.createQuery(sql);                    if(param!=null)                    {                        for(int i=0;i<param.length;i++)                        {                            query.setString(i,param[i]);                            }                    }                    list=query.list();                }                catch (Exception e)                {                }                finally                {                    if(session!=null)                    {                        session.close();                    }                }              return list;          }          /**        * @param sql        * @param param 查询单条记录        * @return        */        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;          }        /**        * @param <T>        * @param sql        * @param param        * @param page        * @param size        * @return 实现分页查询        */        @SuppressWarnings("unchecked")        public static <T> List<T> queryByPage(String sql,String[] param,int page,int size)          {              List<T> list=new ArrayList<T>();              Session session=null;               try                {                    session=getSession();                    Query query=session.createQuery(sql);                    if(param!=null)                    {                        for(int i=0;i<param.length;i++)                        {                            query.setString(i,param[i]);                            }                    }                    //筛选条数                    query.setFirstResult((page-1)*size);                    query.setMaxResults(size);                    list=query.list();                }                catch (Exception e)                {                }                finally                {                    if(session!=null)                    {                        session.close();                    }                }              return list;          }        /**        * @param hql        * @param pras        * @return返回数据个数        */        public static int getCount(String hql, String[] pras) {            int resu = 0;            Session s = null;            try {                s = getSession();                Query q = s.createQuery(hql);                if (pras != null) {                    for (int i = 0; i < pras.length; i++) {                        q.setString(i, pras[i]);                    }                }                resu = Integer.valueOf(q.iterate().next().toString());            } catch (Exception e) {                e.printStackTrace();            } finally {                if (s != null)                    s.close();            }            return resu;        }                 }