从毫秒到小时、分钟、秒和毫秒
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【中文标题】从毫秒到小时、分钟、秒和毫秒【英文标题】:From milliseconds to hour, minutes, seconds and milliseconds 【发布时间】:2012-06-08 02:20:53 【问题描述】:我需要从毫秒到代表相同时间量的(小时、分钟、秒、毫秒)的元组。例如:
10799999ms = 2h 59m 59s 999ms
下面的伪代码是我唯一能想到的:
# The division operator below returns the result as a rounded down integer
function to_tuple(x):
h = x / (60*60*1000)
x = x - h*(60*60*1000)
m = x / (60*1000)
x = x - m*(60*1000)
s = x / 1000
x = x - s*1000
return (h,m,s,x)
我确信它一定可以做得更智能/更优雅/更快/更紧凑。
【问题讨论】:
您可以使用模运算符(C 和朋友中的 % )稍微简化 x 的计算(例如 x = x % (60*60*1000) ) 确保您使用的标准语言库中没有此类功能。 【参考方案1】:这是我在 Java 中的做法:
int seconds = (int) (milliseconds / 1000) % 60 ;
int minutes = (int) ((milliseconds / (1000*60)) % 60);
int hours = (int) ((milliseconds / (1000*60*60)) % 24);
【讨论】:
在java中使用TimeUnit让代码更具可读性是值得的。long millis = 12884983; System.out.println(((millis / (1000 * 60)) % 60)); System.out.println(java.util.concurrent.TimeUnit.MILLISECONDS.toMinutes(millis));
输出:34 | 214【参考方案2】:
好问题。是的,可以更有效地做到这一点。您的 CPU 可以在一次操作中提取两个整数之比的商和余数。在<stdlib.h>
中,公开此CPU 操作的函数称为div()
。在你的伪代码中,你会像这样使用它:
function to_tuple(x):
qr = div(x, 1000)
ms = qr.rem
qr = div(qr.quot, 60)
s = qr.rem
qr = div(qr.quot, 60)
m = qr.rem
h = qr.quot
效率较低的答案是分别使用/
和%
运算符。但是,无论如何,如果您需要商和余数,那么您不妨调用更高效的div()
。
【讨论】:
【参考方案3】:也许可以更短更优雅。但我做到了。
public String getHumanTimeFormatFromMilliseconds(String millisecondS)
String message = "";
long milliseconds = Long.valueOf(millisecondS);
if (milliseconds >= 1000)
int seconds = (int) (milliseconds / 1000) % 60;
int minutes = (int) ((milliseconds / (1000 * 60)) % 60);
int hours = (int) ((milliseconds / (1000 * 60 * 60)) % 24);
int days = (int) (milliseconds / (1000 * 60 * 60 * 24));
if((days == 0) && (hours != 0))
message = String.format("%d hours %d minutes %d seconds ago", hours, minutes, seconds);
else if((hours == 0) && (minutes != 0))
message = String.format("%d minutes %d seconds ago", minutes, seconds);
else if((days == 0) && (hours == 0) && (minutes == 0))
message = String.format("%d seconds ago", seconds);
else
message = String.format("%d days %d hours %d minutes %d seconds ago", days, hours, minutes, seconds);
else
message = "Less than a second ago.";
return message;
【讨论】:
【参考方案4】:不是很优雅,但会更短一些
function to_tuple(x):
y = 60*60*1000
h = x/y
m = (x-(h*y))/(y/60)
s = (x-(h*y)-(m*(y/60)))/1000
mi = x-(h*y)-(m*(y/60))-(s*1000)
return (h,m,s,mi)
【讨论】:
【参考方案5】:milliseconds = x
total = 0
while (milliseconds >= 1000)
milliseconds = (milliseconds - 1000)
total = total + 1
hr = 0
min = 0
while (total >= 60)
total = total - 60
min = min + 1
if (min >= 60) hr = hr + 1
if (min == 60) min = 0
sec = total
这是 groovy,但我认为这对你来说不是问题。方法完美。
【讨论】:
【参考方案6】:milliseconds = 12884983 // or x milliseconds
hr = 0
min = 0
sec = 0
day = 0
while (milliseconds >= 1000)
milliseconds = (milliseconds - 1000)
sec = sec + 1
if (sec >= 60) min = min + 1
if (sec == 60) sec = 0
if (min >= 60) hr = hr + 1
if (min == 60) min = 0
if (hr >= 24)
hr = (hr - 24)
day = day + 1
希望我的短方法能帮到你
【讨论】:
【参考方案7】:import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.TimeUnit;
public class MyTest
public static void main(String[] args)
long seconds = 360000;
long days = TimeUnit.SECONDS.toDays(seconds);
long hours = TimeUnit.SECONDS.toHours(seconds - TimeUnit.DAYS.toSeconds(days));
System.out.println("days: " + days);
System.out.println("hours: " + hours);
【讨论】:
【参考方案8】:基于 Valentinos 答案的 Arduino (c++) 版本
unsigned long timeNow = 0;
unsigned long mSecInHour = 3600000;
unsigned long TimeNow =0;
int millisecs =0;
int seconds = 0;
byte minutes = 0;
byte hours = 0;
void setup()
Serial.begin(9600);
Serial.println (""); // because arduino monitor gets confused with line 1
Serial.println ("hours:minutes:seconds.milliseconds:");
void loop()
TimeNow = millis();
hours = TimeNow/mSecInHour;
minutes = (TimeNow-(hours*mSecInHour))/(mSecInHour/60);
seconds = (TimeNow-(hours*mSecInHour)-(minutes*(mSecInHour/60)))/1000;
millisecs = TimeNow-(hours*mSecInHour)-(minutes*(mSecInHour/60))- (seconds*1000);
Serial.print(hours);
Serial.print(":");
Serial.print(minutes);
Serial.print(":");
Serial.print(seconds);
Serial.print(".");
Serial.println(millisecs);
【讨论】:
【参考方案9】:只是另一个 java 示例:
long dayLength = 1000 * 60 * 60 * 24;
long dayMs = System.currentTimeMillis() % dayLength;
double percentOfDay = (double) dayMs / dayLength;
int hour = (int) (percentOfDay * 24);
int minute = (int) (percentOfDay * 24 * 60) % 60;
int second = (int) (percentOfDay * 24 * 60 * 60) % 60;
如果你调整dayLength
,你可以模拟更短的天数
【讨论】:
【参考方案10】:Kotlin 示例,其前导零的小时/分钟/秒小于 10。因此,如果您想在 UI 中将该值用作字符串,那么您最终会得到相同的持续时间。
这给出了 01:57:01 而不是 1:57:1,这可能会混淆 hh:mn:ss 注释。
val timeInMilliSec = 45600030
val hours = timeInMilliSec.div(3600).rem(24)
val minutes = timeInMilliSec.div(60).rem(60)
val seconds = timeInMilliSec.rem(60)
val hoursFormatted = if (hours < 10) "0$hours" else "$hours"
val minutesFormatted = if (minutes < 10) "0$minutes" else "$minutes"
val secondsFormatted = if (seconds < 10) "0$seconds" else "$seconds"
"$hoursFormatted:$minutesFormatted:$secondsFormatted"
【讨论】:
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