QBC分页查询

1、第一种方式

public class DetailDaoImpl extends HibernateTemplate implements DetailDaoInterface {

　　private Log log=LogFactory.getLog(ConstantsApplication.P2PAPPLICATION_LOG);

/**
 * 查询符合条件的指定区间的记录
 */
 public List<AppInfoPO> queryApproveDetailInfo(ApproveDetailQueryModel qm, int startNumber, int maxNumber) throws APSException {

　　log.info("开始查询明细……");
  　　try{

　　　　DetachedCriteria c = this.getDetachedCriteria(qm);
   　　　return  findByCriteria(c,startNumber,maxNumber);

　　　　} catch (Exception e) {
   　　　　　　log.error("查询明细异常", e);
  　　　　　　 throw new APSException("查询明细异常，在方法queryApproveDetailInfo中", e);
  　　　}

}

/**
  * 查询符合条件的记录数
  */
 public int queryApproveDetailInfoCount(ApproveDetailQueryModel qm) throws APSException {

　　log.info("开始查询审批明细……");
  　　DetachedCriteria d = this.getDetachedCriteria(qm);
 　　 d.setProjection(Projections.rowCount());
 　　 List list = this.findByCriteria(d);
  　　if (list != null && list.size() > 0)
   　　return Integer.valueOf(list.get(0).toString());
 　　 return 0;

}

/**
 * 创建公共查询条件
 * @param qm
 * @return
 */
 public DetachedCriteria  getDetachedCriteria(ApproveDetailQueryModel qm){
  　　  DetachedCriteria c = DetachedCriteria.forClass(AppInfoPO.class);
          if(!CommonMethod.isNull(qm.getCreditDateisnotnull())){
         　　c.add(Property.forName("creditDate").isNotNull());
          }

　　　　c.addOrder(Order.asc("creditName"));
    　　c.addOrder(Order.desc("creditDate")); 
    　　return c;

}

2、SQL分页

Query query = session.createQuery(hql);
query.setFirstResult(offset);
query.setMaxResults(length);
List list = query.list();

 

hxzon

public List getCategorys(final int currentpage, final int pagesize) {
log.debug("finding all ShbbsCategory instances");

   List list = getHibernateTemplate().executeFind(new HibernateCallback() {
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
String hql = "from ShbbsCategory";
Query query = session.createQuery(hql);
query.setFirstResult((currentpage - 1) * pagesize);
query.setMaxResults(pagesize);
List list = query.list();
return list;
}
});
return list;

}

预编译

String hql = "FROM ShbbsCategory AS p WHERE p.uid LIKE ? OR p.name LIKE ?";
Query query = session.createQuery(hql);
query.setString(0, "%" + cond + "%");
query.setString(1, "%" + cond + "%");
query.setFirstResult((currentpage - 1) * pagesize);
query.setMaxResults(pagesize);

集合总数1

public Integer getSaleChanceListCount() {    

　　final String hql = "select count(*) from SaleChanceInfo si";    

 　　Query query = arg0.createQuery(hql);    

　　return query.uniqueResult();    

}

集合总数2

String hql = "SELECT COUNT(p.id) from Person AS p WHERE p.uid LIKE ? OR p.name LIKE ?";

Query query = session.createQuery(hql);

List list = query.list();

  if (list.size() > 0) {
count = (Integer) list.get(0);
}
return count;

3、通过Criteria实现分页

Criteria criteria = session.createCriteria( Class arg);

criteria.setFirstResult(offset);
criteria.setMaxResults(length);

return criteria.list();