MapEntryString ListScoreItemTableSourceVO scoreItemTableSourceVOSscoreItemTableSourceVOSgetValuestream mapthisgetEachRowOfData collectCollectorstoList;scoreItemTableSourceVOS怎么判空

可以使用Optional类的ofNullable方法来判断scoreItemTableSourceVOS是否为空。代码示例如下：

Optional<Map.Entry<String, List>> optional = Optional.ofNullable(scoreItemTableSourceVOS); optional.ifPresent(entry -> entry.getValue().stream() .map(this::getEachRowOfData) .collect(Collectors.toList()));