datetime - 如何将包含日期和时区的字符串解析为DateTime

Question

我有可以这样格式化的字符串(取决于时区，例如):

"2018-10-17T15:33:15 UTC"

"2018-10-17T17:03:00 Europe/Praga

"2018-10-18T12:00:00 America/Kentucky/Monticello"

所以这些字符串的末尾包含Zone ID

如何将此类字符串解析为datetime？

我正在尝试:

val dateString = "2018-10-18T12:00:00 America/Kentucky/Monticello"

    ISODateTimeFormat
    .dateTimeParser()
    .parseDateTime(dateString)

更新:

我也尝试过:

val simpleDateFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss zzzz")


val parsed: Date = simpleDateFormat.parse(dateString)

但是无法解析

Answer 1

您可以创建自己的DateTimeFormatter:

val date1 = "2018-10-17T15:33:15 UTC"
val date2 = "2018-10-17T17:03:00 Europe/Prague"
val date3 = "2018-10-18T12:00:00 America/Kentucky/Monticello"

//with JDK
val formatter = java.time.format.DateTimeFormatterBuilder()
    .append(DateTimeFormatter.ISO_LOCAL_DATE_TIME)
    .optionalStart()
    .appendLiteral(' ')
    .parseCaseSensitive()
    .appendZoneRegionId()
    .toFormatter();
println(ZonedDateTime.parse(date1, formatter))
println(ZonedDateTime.parse(date2, formatter))
println(ZonedDateTime.parse(date3, formatter))

//With Joda Time
val jodaFormatter = org.joda.time.format.DateTimeFormatterBuilder()
    .appendPattern("yyyy-MM-dd'T'HH:mm:ss ZZZ").toFormatter()
println(jodaFormatter.parseDateTime(date1))
println(jodaFormatter.parseDateTime(date2))
println(jodaFormatter.parseDateTime(date3))

此格式化程序只能解析“欧洲/布拉格”，而不能解析“欧洲/布拉格”。您可以在此处找到所有受支持的区域ID: https://www.mkyong.com/java8/java-display-all-zoneid-and-its-utc-offset/