问题
在Ruby on Rails中,有一个功能允许你使用任何日期并打印出"很久以前"的状态。
例如:
8 minutes ago
8 hours ago
8 days ago
8 months ago
8 years ago
在Java中有一种简单的方法吗?
#1 热门回答(153 赞)
看看PrettyTimelibrary。
它使用起来非常简单:
import org.ocpsoft.prettytime.PrettyTime;
PrettyTime p = new PrettyTime();
System.out.println(p.format(new Date()));
// prints "moments ago"
你还可以传入国际化消息的区域设置:
PrettyTime p = new PrettyTime(new Locale("fr"));
System.out.println(p.format(new Date()));
// prints "à l'instant"
如评论中所述,Android具有内置于android.text.format.DateUtils
类的此功能。
#2 热门回答(65 赞)
你考虑过TimeUnitenum吗?它对于这种事情非常有用
try {
SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
Date past = format.parse("01/10/2010");
Date now = new Date();
System.out.println(TimeUnit.MILLISECONDS.toMillis(now.getTime() - past.getTime()) + " milliseconds ago");
System.out.println(TimeUnit.MILLISECONDS.toMinutes(now.getTime() - past.getTime()) + " minutes ago");
System.out.println(TimeUnit.MILLISECONDS.toHours(now.getTime() - past.getTime()) + " hours ago");
System.out.println(TimeUnit.MILLISECONDS.toDays(now.getTime() - past.getTime()) + " days ago");
}
catch (Exception j){
j.printStackTrace();
}
#3 热门回答(41 赞)
public class TimeUtils {
public final static long ONE_SECOND = 1000;
public final static long SECONDS = 60;
public final static long ONE_MINUTE = ONE_SECOND * 60;
public final static long MINUTES = 60;
public final static long ONE_HOUR = ONE_MINUTE * 60;
public final static long HOURS = 24;
public final static long ONE_DAY = ONE_HOUR * 24;
private TimeUtils() {
}
/**
* converts time (in milliseconds) to human-readable format
* "<w> days, <x> hours, <y> minutes and (z) seconds"
*/
public static String millisToLongDHMS(long duration) {
StringBuffer res = new StringBuffer();
long temp = 0;
if (duration >= ONE_SECOND) {
temp = duration / ONE_DAY;
if (temp > 0) {
duration -= temp * ONE_DAY;
res.append(temp).append(" day").append(temp > 1 ? "s" : "")
.append(duration >= ONE_MINUTE ? ", " : "");
}
temp = duration / ONE_HOUR;
if (temp > 0) {
duration -= temp * ONE_HOUR;
res.append(temp).append(" hour").append(temp > 1 ? "s" : "")
.append(duration >= ONE_MINUTE ? ", " : "");
}
temp = duration / ONE_MINUTE;
if (temp > 0) {
duration -= temp * ONE_MINUTE;
res.append(temp).append(" minute").append(temp > 1 ? "s" : "");
}
if (!res.toString().equals("") && duration >= ONE_SECOND) {
res.append(" and ");
}
temp = duration / ONE_SECOND;
if (temp > 0) {
res.append(temp).append(" second").append(temp > 1 ? "s" : "");
}
return res.toString();
} else {
return "0 second";
}
}
public static void main(String args[]) {
System.out.println(millisToLongDHMS(123));
System.out.println(millisToLongDHMS((5 * ONE_SECOND) + 123));
System.out.println(millisToLongDHMS(ONE_DAY + ONE_HOUR));
System.out.println(millisToLongDHMS(ONE_DAY + 2 * ONE_SECOND));
System.out.println(millisToLongDHMS(ONE_DAY + ONE_HOUR + (2 * ONE_MINUTE)));
System.out.println(millisToLongDHMS((4 * ONE_DAY) + (3 * ONE_HOUR)
+ (2 * ONE_MINUTE) + ONE_SECOND));
System.out.println(millisToLongDHMS((5 * ONE_DAY) + (4 * ONE_HOUR)
+ ONE_MINUTE + (23 * ONE_SECOND) + 123));
System.out.println(millisToLongDHMS(42 * ONE_DAY));
/*
output :
0 second
5 seconds
1 day, 1 hour
1 day and 2 seconds
1 day, 1 hour, 2 minutes
4 days, 3 hours, 2 minutes and 1 second
5 days, 4 hours, 1 minute and 23 seconds
42 days
*/
}
}
更多@ Format a duration in milliseconds into a human-readable format