java 如何格式化日期/时间字符串？(爪哇)
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How to format date/time string? (Java)
提问by Wil Ferraciolli
Hi can anyone help please? I am trying to format a date and time string.
Currently it looks like this "20160112T110000Z" and I need it to be "2016-01-12T11:00:00Z"
嗨，有人可以帮忙吗？我正在尝试格式化日期和时间字符串。目前它看起来像这样“ 20160112T110000Z”，我需要它是“ 2016-01-12T11:00:00Z”
The string without the special characters are returned from a 3rd party recurrence library. I need to convert it to have the special characters before parsing it to a Calendarobject.
没有特殊字符的字符串从第 3 方重复库返回。在将其解析为Calendar对象之前，我需要将其转换为具有特殊字符。
Can anyone help please?
有人可以帮忙吗？
The code that I have so far looks like:
到目前为止，我的代码如下所示：
final String TIMEFORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'";
String string = "20160112T110000Z";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
Date date = format.parse(string);
System.out.println(date);
However this just does not work.
然而，这只是行不通。
Any suggestions are appreciated
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回答by Arnaud
You have to read the string with a format matching the source, this gives you a correct Date.
您必须使用与源匹配的格式读取字符串，这将为您提供正确的Date.
Then simply write it with the format you want :
然后简单地用你想要的格式写它：
String string = "20160112T110000Z";
String originalStringFormat = "yyyyMMdd'T'HHmmss'Z'";
String desiredStringFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'";
SimpleDateFormat readingFormat = new SimpleDateFormat(originalStringFormat);
SimpleDateFormat outputFormat = new SimpleDateFormat(desiredStringFormat);
try {
Date date = readingFormat.parse(string);
System.out.println(outputFormat.format(date));
} catch (ParseException e) {
e.printStackTrace();
}
