//需要先行搭建好框架，建立好一個實體類Student及一個Util類pageBean

public class StudentDaoImpl implements IStudentDao {

@Override
public PageBean find(int pageIndex, int pageSize, String name,
Integer courseId, Integer stime, Integer educationId, Integer sstate) {
PageBean p=null;
//在開啟資料庫連線(session)之前先組裝好查詢條件
DetachedCriteria detCri=DetachedCriteria.forClass(Student.class);
//設定關聯屬性別名，執行內連線查詢
detCri.createAlias("course", "c");
detCri.createAlias("education", "e");
//判斷條件的有效性，組裝條件
if(StringUtils.isNotEmpty(name)){
detCri.add(Restrictions.like("name",name,MatchMode.ANYWHERE));
}
if(courseId!=null){
detCri.add(Restrictions.eq("c.id",courseId));
}
if(stime!=null){
detCri.add(Restrictions.eq("stime",stime));
}
if(educationId!=null){
detCri.add(Restrictions.eq("e.id",educationId));
}
if(sstate!=null){
detCri.add(Restrictions.eq("sstate",sstate));
}


Session session=null;
try {
session=HibernateUtil.getSession();
//獲得可執行的Criteria


Criteria criteria=detCri.getExecutableCriteria(session);

//設定聚合運算
criteria.setProjection(Projections.rowCount());
//查詢總行數
int rowCount=((Number)criteria.uniqueResult()).intValue();

int pageCount=(rowCount%pageSize==0)?(rowCount/pageSize):(rowCount/pageSize+1);

int firstResult=(pageIndex-1)*pageSize;

criteria.setProjection(null);

List<Student> results=criteria.setFirstResult(firstResult)
 .setMaxResults(pageSize)
 .addOrder(Order.desc("id"))
 .setResultTransformer(DistinctRootEntityResultTransformer.INSTANCE)
 .list();

p.setPageIndex(pageIndex);
p.setPageSize(pageSize);
p.setRowCount(rowCount);
p.setPageCount(pageCount);
p.setResults(results);

} catch (Exception e) {
e.printStackTrace();
}
finally{
session.close();
}


return p;


}