根据groupUuid去重:
List<AssignAndNursingVo> distinctList = groupList.stream().collect(
Collectors.collectingAndThen(Collectors.toCollection(
() -> new TreeSet<>(Comparator.comparing(o -> o.getGroupUuid()))), ArrayList::new));
参考链接:https://blog.youkuaiyun.com/tangerr/article/details/90349986