MyBatis查询结果封装成List

<select id="associationCountByMap" resultType="java.lang.String">        select sayings_id from user_sayings_group_relation o left join user_sayings p        on o.sayings_id = p.id        where 1=1         <include refid="association_params" />    </select>

1.reslutType写List里面的元素类型，而不是List本身
2.接收方法
List associationCountByMap(@Param(“params”)Map