Java 代码优化：使用 Stream 简化集合处理

return CollectionUtils.emptyIfNull(tableSource) .stream() .filter(Objects::nonNull) .flatMap(this::convertAndErgodic) .map(scoreItem -> createScoreRecode(scoreItem, activityId)) .collect(Collectors.toList());

private Stream convertAndErgodic(TableSource tableSource) { return convertScores(tableSource) .stream() .flatMap(TreeBuilderUtil::postorderErgodic); }