mybatis多表联查,返回结果嵌套list

 多层集合嵌套返回结果用resultMap,collection中再次使用resultMap

<resultMap id="chainVo" type="com.suncnpap.intelligentqa.vo.ChainVo">
    <id column="cid" property="id"/>
    <result column="access_key" property="accessKey"/>
    <result column="secret_key" property="secretKey"/>
    <result column="outer_chain_name" property="outerChainName"/>
    <result column="outer_chain_document" property="outerChainDocument"/>
    <collection property="intentionVos" ofType="com.suncnpap.intelligentqa.vo.ChainIntentionVo"
                resultMap="intentionVos"/>
</resultMap>

<resultMap id="intentionVos" type="com.suncnpap.intelligentqa.vo.ChainIntentionVo">
    <id column="iid" property="id"/>
    <result column="intention_name" property="intentionName"/>
    <collection property="questionVoList" ofType="com.suncnpap.intelligentqa.vo.MultiQuestionVo">
        <id column="qid" property="id"/>
        <result column="question" property="question"/>
    </collection>
    <collection property="wordVos" ofType="com.suncnpap.intelligentqa.vo.ChainIntentionWordVo">
        <id column="wid" property="id"/>
        <result column="word_slot" property="wordSlot"/>
        <result column="word_slot_miss_question" property="wordSlotMissQuestion"/>
        <result column="entity_type_ids" property="entityTypeIds"/>
    </collection>
</resultMap>

<select id="detail" resultMap="chainVo">
    select tc.id   as tid,
           tci.id  as iid,
           tciw.id as wid,
           tmq.id  as qid,
           access_key,
           secret_key,
           outer_chain_name,
           outer_chain_document,
           intention_name,
           question,
           word_slot,
           word_slot_miss_question,
           entity_type_ids
    from t_chain tc
             left join t_chain_intention tci on tc.id = tci.chain_id
             left join t_chain_intention_word tciw on tci.id = tciw.intention_id
             left join t_multi_question tmq on tci.id = tmq.parent_id
    where tc.id = #{id}
      and tc.deleted = 0
</select>

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