HibernateTemplate实现分页

Spring 整合 Hibernate 时候用的 HibernateTemplate 不支持分页,因此需要自己包装一个类进行分页,具体实现如下...使用spring的hibernateTemplate的回调机制扩展hibernateTemplate的功能实现分页

import java.sql.SQLException;
import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Criterion;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.HibernateTemplate;

public class PageUtil<T> {
private HibernateTemplate hibernateTemplate;

// 使用hql 语句进行操作
public List<T> getListForPage(final String hql, final int offset, final int length) {
@SuppressWarnings("unchecked")
List<T> list = hibernateTemplate.executeFind(new HibernateCallback<Object>() {

@Override
public Object doInHibernate(Session session) throws HibernateException, SQLException {
//String hql = "from Entity";
Query query = session.createQuery(hql);
query.setFirstResult(offset);
query.setMaxResults(length);
return query.list();
}
});
return list;
}

// 使用criterion进行操作
protected List getListForPage(final Class arg, final Criterion[] criterions, final int offset, final int length) {
List list = hibernateTemplate.executeFind(new HibernateCallback() {
public Object doInHibernate(Session session) throws HibernateException, SQLException {
Criteria criteria = session.createCriteria(arg);
// 循环遍历添加约束条件
for (int i = 0; i < criterions.length; i++) {
criteria.add(criterions[i]);
}
criteria.setFirstResult(offset);
criteria.setMaxResults(length);
return criteria.list();
}
});
return list;
}

// 获得集合的总数（聚合查询）
public int getSaleChanceListCount() {
int totalRecord = hibernateTemplate.execute(new HibernateCallback<Integer>() {

@Override
public Integer doInHibernate(Session session) throws HibernateException, SQLException {
String hql = "select count(id) from Entity";
Query query = session.createQuery(hql);
//query.uniqueResult()返回Long，强转Number再获取intValue
Number num = (Number) query.uniqueResult();
return num.intValue();
}
});
return totalRecord;
}
}