使用resultMap实现ibatis复合数据结构查询(1.多重属性查询;2.属性中含有列表查询)

以订单为例,直接上代码:

1.多重属性查询

java实体

public class OrderDetail {

    @XmlElement(required = true)
    protected String orderSn;
    @XmlElement(required = true)
    protected String orderAmount;
    @XmlElement(required = true)
    protected String orderStatus;
    @XmlElement(required = true)
    protected String orderAddTime;
    @XmlElement(required = true)
    protected Logistics logistics;
    @XmlElement(required = true)
    protected OrderGoods orderGoods;
    @XmlElement(required = true)
    protected List listData;

        ... getter  setter...

}

class="orderDetail" 即为上面的类,有个属性logistics的类型是复合类型Logistics

   
      	 	select  
                  order_sn as orderSn,
                  order_amount as orderAmount,
                  order_status as orderStatus,
                  add_time as orderAddTime,
                  consignee,
                  country,
                         
                  b.region_name province,
                  c.region_name city,
                  d.region_name district,
                  address,
                  mobile,
                  shipping_name as shippingName
                  
			from  ecs_order_info  o	
				  left join ecs_region b on o.province=b.region_id
	        	  left join ecs_region c on o.city=c.region_id
	        	  left join ecs_region d on o.district=d.region_id   				
			where  order_sn=#orderSn#
        

2.属性中含有列表查询

orderDetail有个属性orderGoods的类型是List复合类型,应在resultMap的属性定义中给这个list做查询 :getOrderGoodsList

看下这个查询 getOrderGoodsList

 
            	 	
      	 	select goods_name as goodsName,
                   goods_number as goodsNumber
            from ecs_order_goods where order_id=
      	 	(select order_id from ecs_order_info where order_sn=#orderSn#)