hibernate如何使用criteria查詢 oracle分组group by案例

hql语句：    （TicketDAOImpl）

public List listNumTicket(String status) throws Exception {

Session session=super.getSession();

ProjectionList projectionList = Projections.projectionList(); 

projectionList.add(Projections.groupProperty("project.resourceId"));  //需要分组的字段

projectionList.add(Projections.rowCount());   //每组的记录条数

Criteria criteria =null;

if(status!="") //当有条件时

{

Ticket ticket = new Ticket(); 

ticket.setStatus(status);

criteria = session.createCriteria(Ticket.class); 

criteria.add(Example.create(ticket)); 

}else

{

criteria = session.createCriteria(Ticket.class); 

}

criteria.setProjection(projectionList); 

List list = criteria.list(); 

 

return list;

}

action调用：

List yticketList=ticketService.listNumTicket("已修复"); //取值如下

Iterator iterator2 = yticketList.iterator();

while(iterator2.hasNext()){   

Object[] object=(Object[])iterator2.next();

Object id=object[0];

Object num=object[1];

if(id!=null){

Project project=projectService.findById(id.toString());

project.setyTicketNum(num.toString());

projectService.update(project);

}

}