java 排序本地日期时间
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Sorting LocalDateTime
提问by Abdullah Asendar
How to sort LocalDateTimeobjects?
如何对LocalDateTime对象进行排序？
I tried the following:
我尝试了以下方法：
Comparator<Data> comparator = new Comparator<Data>() {
@Override
public int compare(final data o1, final data o2) {
if (o1.getDate()== null || o2.getDate() == null)
return 0;
return o1.getDate().compareTo(o2.getDate());
}
};
Collections.sort(comments, comparator);
After testing I think it sorts according to the date, but is the time part (HH:MM:SS) ignored?
经过测试，我认为它是根据日期排序的，但是时间部分 (HH:MM:SS) 是否被忽略了？
回答by Adam Michalik
Both JodaTime and JDK 8 LocalDateTimeclasses implement the Comparableinterface, so you can sort them using their natural order. Just do
JodaTime 和 JDK 8LocalDateTime类都实现了该Comparable接口，因此您可以使用它们的自然顺序对它们进行排序。做就是了
Collections.sort(data);
回答by jasper
Check out isAfter()and isBefore(). Click for the Docs. And maybe try to work on your indentation, I was a bit uncertain as to what is inside the if clause. Maybe even try to use curly braces {} even fore one-liners, but that's a matter of personal preference.
查看isAfter()和isBefore()。单击以获取文档。也许尝试处理您的缩进，我有点不确定 if 子句中的内容。甚至可以尝试使用花括号 {} 甚至前一行，但这是个人喜好的问题。
