SSH 分页方法一，基于struts2

SSH分页查询留言记录 Dao层：/**  * 分页查询全部留言  */ public List<Ly> getMessageByPaging(int currentPage,int pageSize){  Session session=this.getHibernateTemplate().getSessionFactory().openSession();  Query query=session.createQuery("from Ly ");  int startRow=(currentPage-1)*pageSize;  query.setFirstResult(startRow);   query.setMaxResults(pageSize);  List<Ly> message=query.list();  session.close();  return message; }  /**  * 得到留言总数  */ public int getTotle(){  List<Ly> message=this.getHibernateTemplate().find("from Ly");  return message.size(); }  /**  * 分页查询指定课程留言  */ public List<Ly> getMessageByCoursePaging(int courseId,int currentPage,int pageSize){  Session session=this.getHibernateTemplate().getSessionFactory().openSession();  Query query=session.createQuery("from Ly as a where a.kcId.id=?");  query.setParameter(0, courseId);  int startRow=(currentPage-1)*pageSize;  query.setFirstResult(startRow);   query.setMaxResults(pageSize);  List<Ly> message=query.list();  session.close();  return message; }  /**  * 获取指定课程留言总数  */ public int getTotleByCourse(int courseId){  List<Ly> mesByCourse = this.getHibernateTemplate().find("from Ly as a where a.kcId.id=?",courseId);  return mesByCourse.size(); } Service层：/**  * 分页查询  */ public List<Ly> getMessageByPaging(int currentPage,int pageSize){  return lyDao.getMessageByPaging(currentPage, pageSize); }  /**  * 得到留言总数  */ public int getTotal(){  return lyDao.getTotle(); }  /**  * 分页查询指定课程留言  */ public List<Ly> getMesByCoursePaging(int courseId,int currentPage,int pageSize){  return lyDao.getMessageByCoursePaging(courseId, currentPage, pageSize); }  /**  * 得到指定课程留言总数  */ public int getTotalByCourse(int courseId){  return lyDao.getTotleByCourse(courseId); } Action层： private int currentPage; private int totalPage; private int totalSize; private int pageSize = 10; /**  * 获得全部留言分页实现  * @return  */ public String browsePaging() {   if(currentPage==0){   currentPage = 1;  }  totalSize=messageService.getTotal();    int mod = totalSize%pageSize;   if(mod==0){    totalPage = totalSize/pageSize;   }else     totalPage = totalSize/pageSize+1;       setGetMessage(messageService.getMessageByPaging(currentPage, pageSize));    return "success";  }  /**  * 保存留言后分页实现  */ public String saveMessagePaging(){  if(currentPage==0){   currentPage = 1;  }  totalSize=messageService.getTotalByCourse(courseId);    int mod = totalSize%pageSize;  if(mod==0){   totalPage = totalSize/pageSize;  }else    totalPage = totalSize/pageSize+1;       setGetMessage(messageService.getMesByCoursePaging(courseId, currentPage, pageSize));    return "success"; }   JSP页面：<!--全部留言--><center>当前是第${currentPage}页,共有${totalPage}页 <a href="browsePaging.action?currentPage=1" >首页</a> <s:if test="%{currentPage>1}"><a href="browsePaging.action?currentPage=${currentPage-1}" >上一页</a> <a href="browsePaging.action?currentPage=${currentPage-1}" >${currentPage-1}</a></s:if> <a href="browsePaging.action?currentPage=${currentPage}" >${currentPage}</a> <s:if test="%{totalPage>currentPage}"><a href="browsePaging.action?currentPage=${currentPage+1}" >${currentPage+1}</a> <a href="browsePaging.action?currentPage=${currentPage+1}" >下一页</a></s:if> <a href="browsePaging.action?currentPage=${totalPage}" >尾页</a></center> <!--根据课程得到的留言--><center> 当前是第${currentPage}页,共有${totalPage}页  <a href="saveMessagePaging.action?currentPage=1&courseId=${courseId}" >首页</a>  <s:if test="%{currentPage>1}"><a href="saveMessagePaging.action?currentPage=${currentPage-1}&courseId=${courseId}" >上一页</a>   <a href="saveMessagePaging.action?currentPage=${currentPage-1}&courseId=${courseId}" >${currentPage-1}</a></s:if> <a href="saveMessagePaging.action?currentPage=${currentPage}&courseId=${courseId}" >${currentPage}</a>  <s:if test="%{totalPage>currentPage}"><a href="saveMessagePaging.action?currentPage=${currentPage+1}&courseId=${courseId}" >${currentPage+1}</a> <a href="saveMessagePaging.action?currentPage=${currentPage+1}&courseId=${courseId}" >下一页</a></s:if>  <a href="saveMessagePaging.action?currentPage=${totalPage}&courseId=${courseId}" >尾页</a> </center>