query.list()查询转化成实体时 会报转换异常

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原因： hibernate中写了sql ：“SELECT o.id AS orderId,o.door_id AS doorId,p.prd_id AS prdId,p.price_id AS priceId,p.num AS purchaseNum FROM store_order o,store_order_prd p WHERE o.status = 0 AND DATE_SUB(NOW(), INTERVAL 1 DAY) >= o.create_time AND p.order_id=o.id AND o.is_delete =0 AND p.is_delete =0”

Query query = this.getHibernateTemplate().getSessionFactory().getCurrentSession().createSQLQuery(sql.toString());

在装换中hibernate中先是转化成object，这时 编译和查询都是没有问题，但是在services中应用到这个实体时 就会出现类转换异常的错误。

 

解决办法，查询时 要把查询出来的实体进行强制转化：

语法： return query.setResultTransformer(Transformers.aliasToBean(AddPrdStockVo.class)).list();

 

 

完整列子：

 

public List getOrderStockNum() {

String sql = "SELECT o.id AS orderId,o.door_id AS doorId,p.prd_id AS prdId,p.price_id AS priceId,p.num AS purchaseNum FROM store_order o,store_order_prd p WHERE o.status = 0 AND DATE_SUB(NOW(), INTERVAL 1 DAY) >= o.create_time AND p.order_id=o.id AND o.is_delete =0 AND p.is_delete =0";

Query query = this.getHibernateTemplate().getSessionFactory().getCurrentSession().createSQLQuery(sql.toString());

return query.setResultTransformer(Transformers.aliasToBean(AddPrdStockVo.class)).list();

}