使用Java 8将ms转换为字符串日期 [英] Convert ms into a string date with Java 8

问题描述

我有一个时间戳(毫秒)，并使用SimpleDateFormater对其进行格式化，如下所示:

I have a timestamp as ms and format this with a SimpleDateFormater like this:

SimpleDateFormat sdfDate = new SimpleDateFormat("MM/d/yyyy h:mm a");

return sdfDate.format(new Date(timeStamp));

现在，我想更改它以使用新的Java 8功能.似乎我真的找不到一种方法来使用新的Java 8类.有提示吗?

Now I'd like to change this to use the new Java 8 abilities. Seems like I really can't find a way to get this working with the new Java 8 Classes. Anyone got a hint?

推荐答案

如果您所拥有的只是毫秒值(假设从Unix Epoch开始)，则可以使用以下命令获取LocalDateTime:

If all you have is a millisecond value (assuming from the Unix Epoch) you can get an LocalDateTime using something like:

LocalDateTime ldt = LocalDateTime.ofInstant(Instant.ofEpochMilli(timeInMillis), ZoneId.systemDefault());
System.out.println(ldt);

可以打印以下内容:

2015-09-29T16:57:40.077

然后您可以使用以下格式进行格式化:

You can then format it using something like this:

System.out.println(ldt.format(DateTimeFormatter.ofPattern("MM/dd/yyyy h:mm a")));

可以打印类似的内容(基于上一个示例的原始时间):

Which can print something like (based on the original time from the previous example):

09/29/2015 4:57 PM

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