在 Java 中将持续时间字符串转换为毫秒
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Converting duration string into milliseconds in Java
提问by Sunny
I apologize if this has already been discussed.
如果已经讨论过这个问题，我深表歉意。
I have a clip duration in a string:
我在一个字符串中有一个剪辑持续时间：
00:10:17
I would like to convert that to value in milliseconds. (Basically 617000 for the above string)
我想将其转换为以毫秒为单位的值。（对于上述字符串，基本上是 617000）
Is there some API that I could use to do this in one or two steps. On basic way would be to split the string and then add the minutes, seconds and hours.
是否有一些 API 可以用来在一两个步骤中完成此操作。基本方法是拆分字符串，然后添加分钟、秒和小时。
But is there a shorter way to do this?
但是有没有更短的方法来做到这一点？
Thanks.
谢谢。
回答by assylias
You could simply parse it manually:
您可以简单地手动解析它：
String s = "00:10:17";
String[] data = s.split(":");
int hours = Integer.parseInt(data[0]);
int minutes = Integer.parseInt(data[1]);
int seconds = Integer.parseInt(data[2]);
int time = seconds + 60 * minutes + 3600 * hours;
System.out.println("time in millis = " + TimeUnit.MILLISECONDS.convert(time, TimeUnit.SECONDS));
回答by Simon Dorociak
Here is one own written possible approach(assumption of same source format always)
这是一种自己编写的可能方法（始终假设相同的源格式）
String source = "00:10:17";
String[] tokens = source.split(":");
int secondsToMs = Integer.parseInt(tokens[2]) * 1000;
int minutesToMs = Integer.parseInt(tokens[1]) * 60000;
int hoursToMs = Integer.parseInt(tokens[0]) * 3600000;
long total = secondsToMs + minutesToMs + hoursToMs;
回答by Basil Bourque
java.time.Duration
java.time.Duration
Use the Durationclass.
使用Duration类。
Duration.between(
LocalTime.MIN ,
LocalTime.parse( "00:10:17" )
).toMillis()
milliseconds: 617000
毫秒：617000
See this code live in IdeOne.com.
在 IdeOne.com 中查看此代码。
See this Answer of mineand this Answer of mineto similar Questions for more explanation of Duration, LocalTime, and a java.time.
见我这个答案和这个答案我的类似问题进行更多的解释Duration，LocalTime以及java.time。
Caution:Beware of possible data-loss when converting from possible values of nanosecondsin java.time objects to your desired milliseconds.
回答by Bhavesh Shah
Create an appropriate instance of DateFormat. Use the parse()method to get a Date. Use getTime()on the Dateobject to get milliseconds.
创建一个合适的DateFormat. 使用该parse()方法获得一个Date. getTime()在Date对象上使用以获取毫秒。
You can check here.
你可以在这里查看。
I just tested it as:
我只是将其测试为：
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
public class Test {
public static void main(String[] args) throws Exception {
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
String inputString = "00:10:17";
Date date = sdf .parse(inputString);// .parse("1970-01-01" + inputString);
System.out.println("in milliseconds: " + date.getTime());
}
}
