Joda-Time只需数分钟 [英] Joda-Time all in minutes

问题描述

是否有隐藏的方法来获取以分钟为单位的 Joda-Time 时间段(或任何时间)其他)

Is there a hidden way to get a Joda-Time period in minutes (or any other)

现在我要做:

(period.getHours()*60 + period.getMinutes() + roundTwoDecimals((double)(period.getSeconds()/60)))
double roundTwoDecimals(double d) {
        DecimalFormat twoDForm = new DecimalFormat("#.##");
    return Double.valueOf(twoDForm.format(d));
}

但是出于某种原因，我认为可以有一种更简单的方法.

But for some reason I think there could be an easier way.

我的时间将是最大小时，并且永远不会是几天.这是我第一次在Joda-Time工作.

My times will be max hours, and will never be days. This is my first time with Joda-Time.

推荐答案

由于Period由各个组成部分字段定义(例如5年7周)，因此无法(轻松地)将它们直接转换为分钟值，而无需先将它们与特定的时间关联.

Since Periods are defined by individual component fields (e.g. 5 years, 7 weeks), they cannot (easily) be converted directly to, say, minute values without first associating them with a particular instant in time.

例如，如果您有2个月的时间，那么它包含多少分钟?为了知道这一点，您需要知道哪两个月.也许:

For example, if you have a period of 2 months, how many minutes does it contain? In order to know that, you need to know which two months. Perhaps:

• 六月和七月? (30 + 31 = 61天)
• 七月和八月? (31 + 31 = 62天)
• a年2月和3月? (29 + 31 = 60天)

其中每一个都有不同的分钟数.

Each one of those is going to have a different number of minutes.

请记住，有几种方法可以解决此问题.这是一对:

That in mind, there are a few ways to approach this. Here are a couple:

1. 如果保证您的Period将不包含几个月(或更长时间)，则只需使用

1. If you're guaranteed that your Period won't contain months (or higher), you can just use toStandardSeconds():

Period period = new Period(60, 40, 20, 500);
System.out.println(period.toStandardSeconds().getSeconds() / 60.0);

// outputs 3640.3333333333335

但是，如果您的Period最终以一个月的值结尾，那么您将获得(根据Javadoc)一个UnsupportedOperationException:

However, if you do end up with a month value in your Period, you'll get (per the javadoc) an UnsupportedOperationException:

java.lang.UnsupportedOperationException:无法转换为秒，因为此时间段包含的长度和月份各不相同

java.lang.UnsupportedOperationException: Cannot convert to Seconds as this period contains months and months vary in length

否则，您可以将Period与即时关联，并使用

Otherwise, you can associate the Period with an instant in time and use a Duration:

Period period = new Period(1, 6, 2, 2, 5, 4, 3, 100);

// apply the period starting right now
Duration duration = period.toDurationFrom(new DateTime());

System.out.println(duration.toStandardSeconds().getSeconds() / 60.0);

// outputs 810964.05 (when right now is "2012-01-09T13:36:43.880-06:00")

请注意，#2将根据代码运行的日期打印不同的值.但这仅仅是它的本质.

Note that #2 will print different values depending on the day the code runs. But that's just the nature of it.

或者，您可以考虑从一开始就使用Duration(如果可能的话)，而根本不使用Period.

As an alternative, you might consider just using Durations from the start (if possible) and not using Periods at all.

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