java 如何将字符串转换为日期格式 dd-MMM-yyyy 格式？
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How to convert string into date format dd-MMM-yyyy format?
提问by user998533
I have date in format dd-MMM-yyyy. Now I want to add 30 days to it. How to do this?
我的日期格式为 dd-MMM-yyyy。现在我想增加 30 天。这个怎么做？
回答by Johan Sj?berg
JodaTimeprovides a great approach to this
JodaTime对此提供了一个很好的方法
new DateTime().addDays(30);
It can also easily convert to and from java.util.Dateobjects if you desire to use your date format. You could also achieve a similar result with Calendar
java.util.Date如果您希望使用日期格式，它还可以轻松地与对象相互转换。你也可以达到类似的结果Calendar
Calendar c = GregorianCalendar.getInstance();
c.setTime(/*your date*/);
c.add(Calendar.DAY_OF_YEAR, 30);
回答by Vivin Paliath
Use SimpleDateFormatand Calendar:
使用SimpleDateFormat和Calendar：
Date date = new Date();
try {
SimpleDateFormat format = new SimpleDateFormat("dd-MMM-yyyy");
date = format.parse(dateString);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_YEAR, 30);
date = calendar.getTime();
} catch(ParseException e) {
...
}
However, if you want to make handling dates even more painless, I'd go with Johan's answer (use JodaTime), but this will require use of a third-party library.
但是，如果您想让处理日期更加轻松，我会采用 Johan 的回答（使用JodaTime），但这需要使用第三方库。
