Hibernate以及Spring中如何使用count(*)取得表中记录总数方法。
public int getCount(String emailGroupId, String emailBatchId)
throws HibernateException {
Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();
String hql = “select count(*) from EmailSendInfo where email_group_id = :emailGroupId and batch_id = :batchId”;
Query query = session.createQuery(hql);
query.setString(“emailGroupId”, emailGroupId);
query.setString(“batchId”, emailBatchId);
/** *//**//*
* for (Iterator it = query.iterate(); it.hasNext();) { return
* ((Integer) it.next()).intValue(); }
*/
try {
return ((Integer) query.iterate().next()).intValue();
} catch (Exception e) {
throw new HibernateException(“”);
} finally {
tx.commit();
HibernateUtil.closeSession();
}
}
spring+hibernate
//第一种方法：
String hql = “select count(*) from User as user”;
Integer count = (Integer)getHibernateTemplate().find(hql).listIterator().next();
return count.intValue();
//第二种方法：
String hql = “select count(*) from User as user”;
return ((Integer)getHibernateTemplate().iterate(hql).next()).intValue();
//第三种方法：
String hql = “select count(*) from User as user”;
Query query = getHibernateTemplate().createQuery( getSession(),hql);
return ((Integer)query.uniqueResult()).intValue();
posted on 2008-05-29 14:59 重归本垒（Bing） 阅读(6430) 评论(1) 编辑 收藏 所属分类: JAVA
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# re: Hibernate中如何使用count(*)取得表中记录总数
11
Iterator it=session.iterate(“select count(distinct obj)”+ hql,db.getObjects(),db.getTypes());
Integer count=(Integer)it.next();//这一步报错
page.setTotalItems(count.intValue());