Java 代码优化：简化活动评分项转换方法

private Collection convertActivityScoreItems(final List<ScoreItemConfigVO<ActivityScoreItemEntity, ActivityScoreTableEntity>> scoreItemConfigs) { return CollectionUtils.emptyIfNull(scoreItemConfigs) .stream() .flatMap(config -> config.getScoreItemList().stream()) .flatMap(item -> TreeBuilderUtil.postorderErgodic(item).stream()) .collect(Collectors.toList()); }