Object类型的List转化为对象类型的

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public List<RoundRobinChartData> queryList(RoundRobinChartData conData)
			throws Exception {
		Object[]  params=new Object[] {};
		String hql="from RoundRobinChartData u where 1=1 ";
		if(conData!=null){
			if(conData.getType()!=null &&!"".equals(conData.getType())){
				 hql+="and u.type = ? ";
				 params=new Object[] {conData.getType()};
			}
		}
		hql+=" order by u.keyId desc";
		return baseDao.getJpaTemplate().find(hql,params); 
	}