java - Joda PrintZeroRarelyFirst无法正常工作

如果输入时间为零，我试图让Joda打印“ 0秒”，但是它根本什么也不打印。

以下示例仅输出一个空字符串。这里发生了什么？

PeriodFormatter hoursMinutesSeconds = new PeriodFormatterBuilder()
    .appendHours().appendSuffix(" hour", " hours")
    .appendSeparator(", ", " and ")
    .appendMinutes()
    .appendSuffix(" minute", " minutes")
    .appendSeparator(" and ")
    .printZeroRarelyFirst()
    .appendSeconds()
    .appendSuffix(" second", " seconds")
    .toFormatter();

System.out.println(hoursMinutesSeconds.print(new Period(0, 0, 0, 500)));

最佳答案

您需要早期的printZeroAlways并将您的printZeroRarelyFirst向上移动一点，以使其能够说出0 hours。

import org.joda.time.Period;
import org.joda.time.format.PeriodFormatter;
import org.joda.time.format.PeriodFormatterBuilder;

public class TestFormat {

  public static void main(String[] args) {
    PeriodFormatter hoursMinutesSeconds = new PeriodFormatterBuilder()
    .printZeroAlways()
    .appendHours().appendSuffix(" hour", " hours")
    .printZeroRarelyFirst()
    .appendSeparator(", ", " and ")
    .appendMinutes()
    .appendSuffix(" minute", " minutes")
    .appendSeparator(" and ")
    .appendSeconds()
    .appendSuffix(" second", " seconds")
    .toFormatter();
     System.out.println(hoursMinutesSeconds.print(new Period(0, 0, 0, 0)));
  }
}

但是，您可能更喜欢printZeroRarelyLast解决方案，因为上述方法始终为您提供0个小时。

我更喜欢

public static void main(String[] args) {
    PeriodFormatter hoursMinutesSeconds = new PeriodFormatterBuilder()
    .printZeroRarelyLast()
    .appendHours().appendSuffix(" hour", " hours")
    .appendSeparator(", ", " and ")
    .appendMinutes()
    .appendSuffix(" minute", " minutes")
    .appendSeparator(" and ")
    .appendSeconds()
    .appendSuffix(" second", " seconds")
    .toFormatter();
     System.out.println(hoursMinutesSeconds.print(new Period(0, 0, 0, 0)));
}