在 Java 中格式化时间戳
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Formatting Timestamps in Java
提问by Craig H
Is there a way to format a UTC time into any arbitrary string format I want in java? Basically I was thinking of having some class take the timestamp and I pass it is string telling it how I want it formated, and it returns the formatted string for me. Is there a way to do this?
有没有办法在java中将UTC时间格式化为我想要的任意字符串格式？基本上我正在考虑让某个类获取时间戳，然后我传递它是字符串，告诉它我希望它如何格式化，它会为我返回格式化的字符串。有没有办法做到这一点？
采纳答案by Brendan Cashman
The java.text.SimpleDateFormat class provides formatting and parsing for dates in a locale-sensitive manner.
java.text.SimpleDateFormat 类以区域设置敏感的方式提供日期的格式设置和解析。
The javadoc header for SimpleDateFormatis a good source of detailed information. There is also a Java Tutorialwith example usages.
SimpleDateFormat的 javadoc 标头是详细信息的良好来源。还有一个带有示例用法的Java 教程。
回答by Jay
The DateFormatclass or SimpleDateFormatshould get you there. For example, http://www.epochconverter.com/lists the following example to convert a epoch time to human readable timestamp with Java:
该日期格式类或SimpleDateFormat的应该让你那里。例如，http://www.epochconverter.com/列出了以下使用 Java 将纪元时间转换为人类可读时间戳的示例：
String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date (epoch*1000));
回答by Maxim
回答by Alex Miller
One gotcha to be aware of is that SimpleDateFormat is NOT thread-safe. Do not put it in a static field and use it from multiple threads concurrently.
需要注意的一个问题是 SimpleDateFormat 不是线程安全的。不要把它放在一个静态字段中并从多个线程并发使用它。
