java分頁查詢 方法二 Criteria

1 Action 文件：request.setAttribute("business", pManager.findByPage(comname,id,stationId,mainForm));  

 

2 manager文件：

public List findByPage(String comnameSer,String id,String stationId,PForm form) {
   List result = pDAO.findByPage(comnameSer,form.getPage(),stationId,id);
   int count = pDAO.getRecordCount(stationId,id);
   form.setRecordNum(count);
   int totalPage = (count != 0 && count % form.getPageRowNum() == 0) ?
     (count / form.getPageRowNum()) : (count / form.getPageRowNum() + 1);
   form.setTotal(totalPage);
   if (form.getPage() < 1) {
    form.setPage(1);
   }  
   if (form.getPage() > totalPage) {
    form.setPage(totalPage);
   }
    
   return result;
  }

 

3: Dao文件：

public List findByPage(String name,int pageNum,String stationId,String id) {
        try {
         DetachedCriteria detachedCriteria = DetachedCriteria.forClass(P.class);
            Criteria criteriaQuery = detachedCriteria.getExecutableCriteria(this.getSession());
            criteriaQuery.addOrder(Order.asc(NAME));
            if(!"".equals(stationId) && "".equals(id)){
             criteriaQuery.add(Expression.eq("stationId", stationId));
            }
            return this.getHibernateTemplate().findByCriteria(detachedCriteria, (pageNum-1) * 10, 10);
        } catch (RuntimeException re) {
   log.error("findByPage failed", re);
   throw re;
  }   
    }

 

   public int getRecordCount(String stationId,String id) {
         try {
          DetachedCriteria detachedCriteria = DetachedCriteria.forClass(P.class);
           Criteria criteriaQuery = detachedCriteria.getExecutableCriteria(this.getSession());
          
          if(!"".equals(stationId) && "".equals(id)){
              criteriaQuery.add(Expression.eq("stationId", stationId));
             }
         return this.getHibernateTemplate().findByCriteria(detachedCriteria).size();
         } catch (RuntimeException re) {
    log.error("findByPage failed", re);
    throw re;
   }
     }