ibatis中使用extends实现继承
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1. 场景
MarketingProductDO和ExportMarketingProductDO都继承AbstractMarketingProductDO（抽象类）；
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2. 配置
AbstractMarketingActivityResult:
<resultMap id="abstractMarketingActivityResult" ><result property="Id" column="id" jdbcType="NUMBER"javaType="java.lang.Long" /><result property="productName" column="product_name" jdbcType="VARCHAR"javaType="java.lang.String" /><result property="productImgUrl" column="product_img_url" jdbcType="VARCHAR"javaType="java.lang.String" /><result property="productDetailUrl" column="product_detail_url" jdbcType="VARCHAR"javaType="java.lang.String" /><result property="sellerNickName" column="seller_nick_name" jdbcType="VARCHAR"javaType="java.lang.String" /></resultMap>
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MarketingProductActivity4ExportResult:
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<resultMap id="marketingProductActivity4ExportResult" extends="abstractMarketingActivityResult"><result property="activityName" column="activity_name" jdbcType="VARCHAR"javaType="java.lang.String" /><result property="startDate" column="start_date" jdbcType="DATETIME"javaType="java.util.Date" /><result property="endDate" column="end_date" jdbcType="DATETIME"javaType="java.util.Date" /><result property="activityCreator" column="activity_creator" jdbcType="VARCHAR"javaType="java.lang.String" /><result property="curPrice" column="cur_price" jdbcType="NUMBER"javaType="java.lang.Double" /><result property="discountPrice" column="discount_Price" jdbcType="NUMBER"javaType="java.lang.Double" /></resultMap>?
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3. 注意
?1）resultMap必须extends resultMap
?2）MarketingProductActivity4ExportResult?这个必须配置在AbstractMarketingActivityResult后面，否则会报错
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