Java神操作之利用Mybatis的resultMap的id标签进行分组映射

SQL

    <!--分组测试-->
    <select id="test" resultMap="test">
      select * from mall_shoppingcart where company_id="companyIdTest"
    </select>

resultMap

<resultMap type="com.ls.aluminum.supply.mallothers.bo.Test" id="test">
        <id property="shopId" column="shop_id" jdbcType="INTEGER"/>
        <collection property="mallShoppingcarts"                 ofType="com.ls.aluminum.supply.mallothers.bo.MallShoppingcart" javaType="java.util.ArrayList" resultMap="UMallShoppingcartMap"/>
    </resultMap>

<resultMap type="com.ls.aluminum.supply.mallothers.bo.MallShoppingcart" id="UMallShoppingcartMap">
        <id property="shoppingcartId" column="shoppingcart_id" jdbcType="INTEGER"/>
        <result property="companyId" column="company_id" jdbcType="VARCHAR"/>
        <result property="shopId" column="shop_id" jdbcType="INTEGER"/>
        <result property="productId" column="product_id" jdbcType="INTEGER"/>
        <result property="isProductExists" column="is_product_exists" jdbcType="INTEGER"/>
        <result property="number" column="number" jdbcType="INTEGER"/>
        <result property="unitName" column="unit_name" jdbcType="VARCHAR"/>
        <result property="createTime" column="create_time" jdbcType="TIMESTAMP"/>
        <result property="optionUserId" column="option_user_id" jdbcType="VARCHAR"/>
        <result property="lastModifyOption" column="last_modify_option" jdbcType="VARCHAR"/>
        <result property="lastModifyTime" column="last_modify_time" jdbcType="TIMESTAMP"/>
    </resultMap>

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