示例
List<String> titles = titleList.stream().map(e -> e.get(ConstantUtil.TITLE)).collect(Collectors.toList());
优化:
List<String> fieldList = mountTableVoList.stream().map(ResMountTable::getFieldName).collect(Collectors.toList());
原文：https://www.cnblogs.com/cailijuan/p/11459345.html