Java MyBatis返回两个字段作为Map的key和value问题

<font style="color:#080808;background-color:#ffffff;">MapResultHandler</font>

public class MapResultHandler<K,V> implements ResultHandler<Map<K,V>> {
    
    private final Map<K,V> mappedResults = new HashMap<>();

    @Override
    public void handleResult(ResultContext context) {
        Map map = (Map) context.getResultObject();
        mappedResults.put((K)map.get("key"), (V)map.get("value"));
    }

    public Map<K,V> getMappedResults() {
        return mappedResults;
    }
}

void selectMap(MapResultHandler<String, String> mapResultHandler);

void selectMap(@Param("type") String type, MapResultHandler<String, String> mapResultHandler);

<resultMap id="mapResult" type="java.util.HashMap">
    <result property="key" column="value"/>
    <result property="value" column="label"/>
</resultMap>

<select id="selectMap" resultMap="mapResult">
    SELECT
        t1.`value`,
        t1.`label`
    FROM
        sys_dict t1
    WHERE
        t1.`type` = #{type}
        AND t1.`del_flag` = '0'
</select>

MapResultHandler<String, String> resultHandler = new MapResultHandler<>();
baseMapper.selectMapByLanguage(Global.getLanguage(), resultHandler);
Map<String, String> map = resultHandler.getMappedResults();