MyBatis --关联查询--自关联（查询指定父节点的所有子节点）

Mapper.java 接口定义

 List<***> selectAllWrapper(Map<String, Object> paramter);

Mapper.xml 配置文件

<resultMap id="BaseResultMap" type="SysDataArch">
    <id column="sid" jdbcType="VARCHAR" property="sid" />
    <result column="assort_no" jdbcType="VARCHAR" property="assortNo" />
    <result column="assort_name" jdbcType="VARCHAR" property="assortName" />
    <result column="psid" jdbcType="VARCHAR" property="psid" />
    <result column="security_level_code" jdbcType="VARCHAR" property="securityLevelCode" />
    <result column="storage_type_code" jdbcType="VARCHAR" property="storageTypeCode" />
  </resultMap>
  
  <resultMap id="BaseResultMapWrapper" type="SysDataArchWrapper" extends="BaseResultMap">
    	<collection property="children" ofType="SysDataArchAssort" select="selectChildrenByParent" column="sid"/>
  </resultMap>

 <select id="selectChildrenByParent" parameterType="java.lang.String" resultMap="BaseResultMapWrapper">
  		select 
  			<include refid="Base_Column_List" />
  		from sys_data_arch
  		where psid = #{sid,jdbcType=VARCHAR}
  </select>
  
  <select id="selectAllWrapper" parameterType="map" resultMap="BaseResultMapWrapper">
  		select 
  			<include refid="Base_Column_List" />
  		from sys_data_arch
  		where 1 = 1
  		<include refid="condition" />
  </select>

Service.java 接口定义

 List<SysDataArchAssortWrapper> selectAllWrapper(Map<String, Object> paramter);

ServiceImpl.java 类实现

@Override
	public List<SysDataArchWrapper> selectAllWrapper(Map<String, Object> paramter) {
		// TODO Auto-generated method stub
		return mapper.selectAllWrapper(paramter);
	}

实体定义和拓展对象：

@Setter
@Getter
public class SysDataArch extends BaseModel {
    private String sid;

    private String assortNo;

    private String assortName;

    private String psid;

    private String securityLevelCode;

    private String storageTypeCode;
}

@Setter
@Getter
public class SysDataArchWrapper extends SysDataArch{
	
	private List<SysDataArch> children;
}