java 如何获得默认的日期和时间格式模式
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How can I get default Date and Time format pattern
提问by Russian Bear
Could somebody tell me how can I get the default date and time format pattern(String) for specified locale(or default locale).
有人能告诉我如何获得指定语言环境（或默认语言环境）的默认日期和时间格式模式（字符串）。
What I already found (Could be useful for somebody else):
我已经发现的（可能对其他人有用）：
How to get default locale.
Locale currentLocale= Locale.getDefault(); System.out.print(currentLocale.toString()); Result is "en_US"How to get decimal separator.
DecimalFormatSymbols decimalFormatSymbols = new DecimalFormatSymbols(currentLocale); System.out.print(decimalFormatSymbols.getDecimalSeparator()); Result is "."How to get the default Date and Time format pattern (String);
(do something) System.out.print(something); And got at output something like this: "dd/mm/yyyy" or "hh:mm:ss".. or other values for specified locale.
如何获取默认语言环境。
Locale currentLocale= Locale.getDefault(); System.out.print(currentLocale.toString()); Result is "en_US"如何获得小数点分隔符。
DecimalFormatSymbols decimalFormatSymbols = new DecimalFormatSymbols(currentLocale); System.out.print(decimalFormatSymbols.getDecimalSeparator()); Result is "."如何获取默认的日期和时间格式模式（字符串）；
(do something) System.out.print(something); And got at output something like this: "dd/mm/yyyy" or "hh:mm:ss".. or other values for specified locale.
Thanks a lot.
非常感谢。
UPD:Found solution:
UPD：找到解决方案：
SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
String dateLocalizedFormatPattern = simpleDateFormat.toLocalizedPattern();
The result of System.out.print(dateLocalizedFormatPattern)
on my device is "M/d/yy h:mm a".
采纳答案by Johan Kaving
Update
更新
As Russian Bear mentions in his update to the question there is a toLocalizedPattern()method in SimpleDateFormatthat returns the format string.
正如俄罗斯熊在他对问题的更新中提到的那样，有一种toLocalizedPattern()方法SimpleDateFormat可以返回格式字符串。
Original answer
原答案
SimpleDateFormatuses the following code in it's private constructor:
SimpleDateFormat在它的私有构造函数中使用以下代码：
...
ResourceBundle r = LocaleData.getDateFormatData(loc);
if (!isGregorianCalendar()) {
try {
dateTimePatterns = r.getStringArray(getCalendarName() + ".DateTimePatterns");
} catch (MissingResourceException e) {
}
}
if (dateTimePatterns == null) {
dateTimePatterns = r.getStringArray("DateTimePatterns");
}
...
So the actual format strings seems to be in a ResourceBundleaccessed via the LocaleData.getDateFormatData()method.
所以实际的格式字符串似乎是ResourceBundle通过LocaleData.getDateFormatData()方法访问的。
Unfortunately the LocaleDataclass is a part of the internal sun.util.resourcespackage.
不幸的是，LocaleData该类是内部sun.util.resources包的一部分。
回答by Emil H
I think what you want is to use the DateFormatclass. Check out the getDateInstance(int, Locale)method.
我想你想要的是使用这个DateFormat类。检查getDateInstance(int, Locale)方法。
