论坛java源码（SpringMVC+Hibernate+EL表达式）

package com.sam.bbs.dao; import java.util.List; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.Transaction; import com.sam.bbs.utils.HibernateUtils; public abstract class AbstractDao { public void save(Object obj) throws Exception { Session session = null; Transaction tx = null; try { session = HibernateUtils.getCurrentSession(); tx = session.beginTransaction(); session.save(obj); tx.commit(); } catch (Exception e) { tx.rollback(); throw e; } } public void delete(Object obj) throws Exception { Session session = null; Transaction tx = null; try { session = HibernateUtils.getCurrentSession(); tx = session.beginTransaction(); session.delete(obj); tx.commit(); } catch (Exception e) { tx.rollback(); throw e; } } public void update(Object obj) throws Exception { Session session = null; Transaction tx = null; try { session = HibernateUtils.getCurrentSession(); tx = session.beginTransaction(); session.update(obj); tx.commit(); } catch (Exception e) { tx.rollback(); throw e; } } public Object find(Class clazz, Integer num) throws Exception { Session session = null; Transaction tx = null; Object obj = null; try { session = HibernateUtils.getCurrentSession(); tx = session.beginTransaction(); obj = session.get(clazz, num); tx.commit(); } catch (Exception e) { tx.rollback(); throw e; } return obj; } public List getQueryList(String clazz) { Query query = null; Session session = null; Transaction tx = null; List list = null; try { session = HibernateUtils.getCurrentSession(); tx = session.beginTransaction(); query = session.createQuery("from " + clazz); if(query != null){ list = query.list(); } tx.commit(); } catch (Exception e) { tx.rollback(); throw e; } return list; } }