[英]Pretty print java.time.Duration to something like “2 days”
下列:
java.time.Duration.ofDays(30).toString
產生以下輸出:
PT720H
有沒有一種簡單的方法可以漂亮地打印出來,例如“ 30 days”。
同樣,對於“ P2DT3H4M”之類的東西,我想將其輸出為“ 2天3小時4分鍾”。
我知道在Java中“漂亮打印”持續時間的答案,但是不確定是否可以使用Java的持續時間/將其轉換為Joda的持續時間才能使用?
你可以做java.time.Duration.ofDays(30).toDays()
接收的持續天量,或java.time.Duration.ofDays(30).getSeconds()
為秒。
如果您想使用其他格式,請使用String.format(),如下所示:
Duration dur = Duration.parse("P2DT3H4M5.6S");
Long s = dur.getSeconds();
String formatted = String.format("%d days, %02d hours, %02d minutes", s / 3600, (s % 3600) / 60, (s % 60));
這是文檔: https : //docs.oracle.com/javase/8/docs/api/java/time/Duration.html
我最終使用了這個(從這個答案https://stackoverflow.com/a/49628638/5300930擴展)。
我確定應該有使用Java / Scala庫執行此操作的更簡單方法? 注意,我的輸入將始終是java.time.Duration,我可以使用Joda庫,但是它們必須能夠以java.time.Duration作為輸入。
/** Encodes a [[java.time.Duration]] into a more readable format.
*
* @example
* encodeDuration(Duration.ofDays(30).plusHours(3)) // returns "30 days, 3 hours"
* encodeDuration(Duration.ofDays(1)) // returns "1 day"
* encodeDuration(Duration.parse("PT720H")) // returns "30 days"
* encodeDuration(Duration.parse("PT12000H10S")) // returns "1 year, 4 months, 15 days, 10 seconds"
*/
implicit val encodeDuration: Encoder[java.time.Duration] = (duration: Duration) => {
val oneMinute = 60
val twoMinutes = oneMinute * 2
val oneHour = oneMinute * 60
val twoHours = oneHour * 2
val oneDay = oneHour * 24
val twoDays = oneDay * 2
val oneMonth = oneDay * 30
val twoMonths = oneMonth * 2
val oneYear = oneDay * 365
val twoYears = oneYear * 2
// scalastyle:off cyclomatic.complexity
def encodeDuration(result: List[String], seconds: Long): List[String] = {
seconds match {
case seconds if seconds <= 0 =>
List.empty[String]
case seconds if seconds == 1 =>
result ::: List(s"${seconds} second")
case seconds if seconds < oneMinute =>
result ::: List(s"${seconds} seconds")
case seconds if seconds >= oneMinute && seconds < twoMinutes =>
List(s"${seconds / oneMinute} minute") ::: encodeDuration(result, seconds % oneMinute)
case seconds if seconds >= oneMinute && seconds < oneHour =>
List(s"${seconds / oneMinute} minutes") ::: encodeDuration(result, seconds % oneMinute)
case seconds if seconds >= oneHour && seconds < twoHours =>
List(s"${seconds / oneHour} hour") ::: encodeDuration(result, seconds % oneHour)
case seconds if seconds >= twoHours && seconds < oneDay =>
List(s"${seconds / oneHour} hours") ::: encodeDuration(result, seconds % oneHour)
case seconds if seconds >= oneDay && seconds < twoDays =>
List(s"${seconds / oneDay} day") ::: encodeDuration(result, seconds % oneDay)
case seconds if seconds >= twoDays && seconds < oneMonth =>
List(s"${seconds / oneDay} days") ::: encodeDuration(result, seconds % oneDay)
case seconds if seconds >= oneMonth && seconds < twoMonths =>
List(s"${seconds / oneMonth} month") ::: encodeDuration(result, seconds % oneMonth)
case seconds if seconds >= twoMonths && seconds < oneYear =>
List(s"${seconds / oneMonth} months") ::: encodeDuration(result, seconds % oneMonth)
case seconds if seconds >= oneYear && seconds < twoYears =>
List(s"${seconds / oneYear} year") ::: encodeDuration(result, seconds % oneYear)
case seconds if seconds >= twoYears =>
List(s"${seconds / oneYear} years") ::: encodeDuration(result, seconds % oneYear)
}
}
// scalastyle:on cyclomatic.complexity
Encoder.encodeString(encodeDuration(List.empty[String], duration.getSeconds).mkString(", "))
}
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