public static FastDateFormat getDateTimeInstance(final int dateStyle, final int timeStyle, final TimeZone timeZone, final Locale locale) {
		return cache.getDateTimeInstance(dateStyle, timeStyle, timeZone, locale);
	}
public static FastDateFormat getDateTimeInstance ( final int dateStyle , final int timeStyle , final TimeZone timeZone , final Locale locale ) { return cache . getDateTimeInstance ( dateStyle , timeStyle , timeZone , locale ) ; }
获得 {@link FastDateFormat} 实例<br>
支持缓存

@param dateStyle date style: FULL, LONG, MEDIUM, or SHORT
@param timeStyle time style: FULL, LONG, MEDIUM, or SHORT
@param timeZone 时区{@link TimeZone}
@param locale {@link Locale} 日期地理位置
@return 本地化 {@link FastDateFormat}