Java8 Stream排序空字段排在前面或后面

直接粗暴sorted会NPE，这种写法可以避免

 list.stream().sorted(Comparator.comparing(l -> l.getCreateTime(), Comparator.nullsFirst(Date::compareTo))).collect(toList());
toOrderList.stream().sorted(Comparator.comparing(l -> l.getContractCode(), Comparator.nullsFirst(String::compareTo))).collect(toList());
  

Java8根据某字段顺序和倒序排列

顺序

 resultList.stream().sorted(Comparator.comparing(Role::getCreateTime)).collect(Collectors.toList());
  

倒序

 resultList.stream().sorted(Comparator.comparing(Role::getCreateTime).reversed()).collect(Collectors.toList());
  

谢谢大家支持！！