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This topic created in 2634 days ago, the information mentioned may be changed or developed.
https://i.loli.net/2019/02/19/5c6c005354ef4.jpg
业务是如果查询最近七天的注册用户，我要将数据安装最近的七个自然日分组，我只会写这样的 list.stream().collect(Collectors.groupingBy(Apple::getId))，还请各位大佬帮忙看下如何处理
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TigerWoods Feb 19, 2019 via Android
grohoBy 的参数是一个 Function,你自己写一个 lambda 实现，入参 apple 出参为年月日的字符串。
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vHypnos Feb 20, 2019
先不关注技术问题，你把真实电话号码贴在这里真的好吗。
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vHypnos Feb 20, 2019  2
Map<LocalDate, List<Item>> result = list.stream().collect(Collectors.groupingBy(item -> item.getCreateTime().with(TemporalAdjusters.previousOrSame(DayOfWeek.of(1)))));
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tamer Feb 20, 2019
```
Map<DayOfWeek, List<LocalDate>> collect = lis.stream().collect(Collectors.groupingBy(item -> DayOfWeek.from(item.getCreateTime()))); ``` 参考#3 感恩 又学习到了新姿势 @vHypnos |
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