spring-boot-realworld-example-app/src/main/resources/mapper/TransferData.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="transfer.data">
    <resultMap id="favoriteCount" type="io.spring.application.data.ArticleFavoriteCount">
        <constructor>
            <idArg column="id" javaType="string"/>
            <arg column="favoriteCount" javaType="integer"/>
        </constructor>
    </resultMap>

    <resultMap id="profileData" type="io.spring.application.data.ProfileData">
        <id column="userId" property="id"/>
        <result column="userUsername" property="username"/>
        <result column="userBio" property="bio"/>
        <result column="userImage" property="image"/>
    </resultMap>

    <resultMap id="articleData" type="io.spring.application.data.ArticleData">
        <id column="articleId" property="id"/>
        <result column="articleSlug" property="slug"/>
        <result column="articleTitle" property="title"/>
        <result column="articleDescription" property="description"/>
        <result column="articleBody" property="body"/>
        <result column="articleCreatedAt" property="createdAt"/>
        <result column="articleUpdatedAt" property="updatedAt"/>
        <association property="profileData" resultMap="transfer.data.profileData"/>
        <collection property="tagList" javaType="list" ofType="string">
            <result column="tagName"/>
        </collection>
    </resultMap>

    <resultMap id="commentData" type="io.spring.application.data.CommentData">
        <id column="commentId" property="id"/>
        <result column="commentBody" property="body"/>
        <result column="commentCreatedAt" property="createdAt"/>
        <result column="commentCreatedAt" property="updatedAt"/>
        <result column="commentArticleId" property="articleId"/>
        <association property="profileData" resultMap="profileData"/>
    </resultMap>
</mapper>