類中包含自己 @Data public class SubjectVo {private String id;private int sort;private String title;private List<SubjectVo> children=new ArrayList<>();}<resultMap id="nectList2" type="com.atguigu.guli.service.edu.entity.vo.SubjectVo"><result column="id" jdbcType="VARCHAR" property="id" /><result column="sort" jdbcType="INTEGER" property="sort" /><result column="title" jdbcType="VARCHAR" property="title" /><collection property="children" column="id" ofType="com.atguigu.guli.service.edu.entity.vo.SubjectVo" select="selectnectList2"></collection></resultMap><select id="selectnectList2" resultMap="nectList2">select id,sort,title from edu_subject where parent_id=#{id}</select> @Data public class ChapterVo implements Serializable {private static final long serialVersionUID = 1L;private String id;private String title;private Integer sort;private List<VideoVo> children = new ArrayList<>(); }<resultMap id="nectList2" type="com.atguigu.guli.service.edu.entity.vo.ChapterVo"><result column="id" jdbcType="VARCHAR" property="id" /><result column="sort" jdbcType="INTEGER" property="sort" /><result column="title" jdbcType="VARCHAR" property="title" /><collection property="children" column="id" ofType="com.atguigu.guli.service.edu.entity.vo.VideoVo" select="selectVideoList"></collection></resultMap><select id="getChapterBycourseId" resultMap="nectList2">select id,title,sort from edu_chapter where course_id=#{courseid}</select>

類中不包含自己

總結

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