是否有将 BigDecimal(seconds) 转换为年、月、日、小时、分钟、秒的 API 方法? [英] Is there API methods to convert BigDecimal(seconds) to years, months, days, hours, minutes, seconds?

问题描述

问题的标题包括所有细节.

The title of the question includes all the details.

如果我有 BigDecimal seconds = new BigDecimal("32365423.56");
是否有将其转换为的 API 方法:
n年，n个月，n天，n小时，n分钟，n秒.

If I have BigDecimal seconds = new BigDecimal("32365423.56");
Is there API methods that convert this to:
n years, n months, n days, n hours, n minutes, n seconds.

如果时间以秒为单位不明确，则以秒为单位假设这些值:(我不限于这些值)

If time is ambiguous in seconds, then assume in seconds these values: (I'm not confined to these values)

   BigDecimal year = new BigDecimal("31556908.8");
   BigDecimal month = new BigDecimal("2629739.52");
   BigDecimal day = new BigDecimal("86400");
   BigDecimal hour = new BigDecimal("3600");
   BigDecimal minute = new BigDecimal("60");

推荐答案

您可以使用 java.time.Duration 以 ISO-8601 标准 并作为 JSR-310 实现.Java-9 引入了一些更方便的方法.

You can use java.time.Duration which is modelled on ISO-8601 standards and was introduced with Java-8 as part of JSR-310 implementation. With Java-9 some more convenient methods were introduced.

演示:

import java.math.BigDecimal;
import java.time.Duration;

public class Main {
    public static void main(String[] args) {
        BigDecimal seconds = new BigDecimal("32365423.56");
        Duration duration = Duration.ofNanos(seconds.multiply(BigDecimal.valueOf(1_000_000_000)).longValue());
        System.out.println(duration);

        // Custom format
        // ####################################Java-8####################################
        String formattedDuration = String.format("%d days %d hours %d minutes %d seconds", duration.toDays(),
                duration.toHours() % 24, duration.toMinutes() % 60, duration.toSeconds() % 60);
        System.out.println(formattedDuration);
        // ##############################################################################

        // ####################################Java-9####################################
        formattedDuration = String.format("%d days %d hours %d minutes %d seconds", duration.toDaysPart(),
                duration.toHoursPart(), duration.toMinutesPart(), duration.toSecondsPart());
        System.out.println(formattedDuration);
        // ##############################################################################
    }
}

输出:

PT8990H23M43.56S
374 days 14 hours 23 minutes 43 seconds
374 days 14 hours 23 minutes 43 seconds

从 Trail: Date 了解现代日期时间 API时间.

Learn about the modern date-time API from Trail: Date Time.

• 出于任何原因，如果您必须坚持使用 Java 6 或 Java 7，您可以使用 ThreeTen-Backport 将大部分 java.time 功能向后移植到 Java 6 &7.
• 如果您正在为 Android 项目工作并且您的 Android API 级别仍然不符合 Java-8，请查看 Java 8+ APIs 可通过 desugaring 和 如何在 Android 项目中使用 ThreeTenABP.

• For any reason, if you have to stick to Java 6 or Java 7, you can use ThreeTen-Backport which backports most of the java.time functionality to Java 6 & 7.
• If you are working for an Android project and your Android API level is still not compliant with Java-8, check Java 8+ APIs available through desugaring and How to use ThreeTenABP in Android Project.

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