Struts2+Hibernate框架，非常简单的组合，专门提供给菜鸟级别的

package com.yjd.nb.dao.impl; import java.util.ArrayList; import java.util.List; import org.hibernate.Session; import org.hibernate.Transaction; import com.yjd.domain.common.PageModel; import com.yjd.nb.common.HibernateUtils; import com.yjd.nb.dao.MessageDao; import com.yjd.nb.domain.Message; /** * 留言Dao接口的实现类 */ public class MessageDaoImpl implements MessageDao { /* (non-Javadoc) * @see com.tjitcast.nb.dao.MessageDao#add(com.tjitcast.nb.domain.Message) */ public void add(Message msg) { Session session = null; Transaction tx = null; try { session = HibernateUtils.getSession(); tx = session.beginTransaction(); session.save(msg); tx.commit(); } catch (Exception e) { if(tx != null){ tx.rollback(); } e.printStackTrace(); }finally{ if(session != null){ session.close(); } } } /* (non-Javadoc) * @see com.tjitcast.nb.dao.MessageDao#countAll() */ public int countAll() { int count = 0; Session session = null; Transaction tx = null; try { session = HibernateUtils.getSession(); tx = session.beginTransaction(); Long temp = (Long)session.createQuery("select count(*) from Message").uniqueResult(); if(temp != null && temp.intValue() > 0){ count = temp.intValue(); } tx.commit(); } catch (Exception e) { if(tx != null){ tx.rollback(); } e.printStackTrace(); }finally{ if(session != null){ session.close(); } } return count; } /* (non-Javadoc) * @see com.tjitcast.nb.dao.MessageDao#findByPage(int, int) */ @SuppressWarnings("unchecked") public PageModel<Message> findByPage(int pageNo, int pageSize) { PageModel<Message> pm = new PageModel<Message>(); pm.setPageNo(pageNo); pm.setPageSize(pageSize); int recordCount = this.countAll(); if(recordCount > 0){ pm.setRecordCount(recordCount); List<Message> list = new ArrayList<Message>(); Session session = null; Transaction tx = null; try { session = HibernateUtils.getSession(); tx = session.beginTransaction(); list = session.createQuery("from Message order by id desc") .setFirstResult((pageNo - 1) * pageSize) .setMaxResults(pageSize) .list(); tx.commit(); pm.setData(list); } catch (Exception e) { if(tx != null){ tx.rollback(); } e.printStackTrace(); }finally{ if(session != null){ session.close(); } } } return pm; } }