DetachedCriteria离线查询示例

Dao层：

//离线查询

public List<Emp> findByDet(DetachedCriteria c){

return c.getExecutableCriteria(HibernateSessionFactory.getSession()).list();

}

//BIz业务层

//离线查询

public List findByDet(){

DeptDao dao=new DeptDao();

DetachedCriteria c=DetachedCriteria.forClass(Emp.class,"c")

.setProjection(

Projections.projectionList()

.add(Projections.count("empno"))

//.add(Property.forName("job"))

.add(Projections.avg("sal"),"avg")

.add(Projections.max("sal"))

.add(Projections.min("sal"))

//.add(Projections.groupProperty("dept.deptno"))//dept会返回完整的deptno

.add(Property.forName("dept.deptno").group())

)

//加上条件后的离线查询

.add(Restrictions.gt("dept.deptno",(byte)10))

.addOrder(Order.asc("avg"));

return dao.findByDet(c);

}

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