java-time

What is the Standard way to Parse different Dates passed as Query-Params to the REST API?

由 。_饼干妹妹 提交于 2019-12-02 18:08:05
问题 I am working on a REST API which supports Date as a query param. Since it is Query param it will be String. Now the Date can be sent in the following formats in the QueryParams: yyyy-mm-dd[(T| )HH:MM:SS[.fff]][(+|-)NNNN] It means following are valid dates: 2017-05-05 00:00:00.000+0000 2017-05-05 00:00:00.000 2017-05-05T00:00:00 2017-05-05+0000 2017-05-05 Now to parse all these different date-times i am using Java8 datetime api. The code is as shown below: DateTimeFormatter formatter = new

Java Time period in decimal number of years

由 旧时模样 提交于 2019-12-02 17:01:30
问题 If I calculate the difference between 2 LocalDate 's in java.time using: Period p = Period.between(testDate, today); Then I get an output with the number of years, months, days like: Days = 9 Months = 6 Years = 18 Does anyone know a clean way to represent that as a decimal type value (ie, above would be something around 18.5... )? 回答1: I would avoid using Period, and instead just calculate the difference in days: float years = testDate1.until(today, ChronoUnit.DAYS) / 365.2425f; 回答2: You

Save a formatted String to a LocalDate

由 六月ゝ 毕业季﹏ 提交于 2019-12-02 15:41:01
问题 I have a DateConverter class: public class DateConverter extends StringConverter<LocalDate> { String pattern = "EEE, dd. MM. uuuu"; DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern,Locale.US); @Override public String toString(LocalDate object) { try { return formatter.format(object); } catch(Exception ex) { return ""; } } @Override public LocalDate fromString(String string) { try { return LocalDate.parse(string, formatter); } catch(Exception ex) { return null; } } public

DateTimeParseException: Text '2019-06-07 12:18:16' could not be parsed

由 对着背影说爱祢 提交于 2019-12-02 13:15:43
I have following code to convert an Instant to String then convert it back to I String timestampString = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm:ss")); LOGGER.info("timestampString: " + timestampString); Instant instant = LocalDateTime.parse(timestampString, DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm:ss")).toInstant(ZoneOffset.UTC); it print the timestampString as: 2019-06-07 12:45:57 and failed at parse the string: java.time.format.DateTimeParseException: Text '2019-06-07 12:45:57' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor:

Converting date without time for different timezone

由 狂风中的少年 提交于 2019-12-02 08:54:31
问题 I store the date in UTC long and displayed in user timezone. But when I try to store only days without time it misleading to different dates. Eg: Scheduling event on 05/06/2016 (06 May 2016). This date is unique for all regions without timezone. If user from GMT+5:30 timezone trying to add a event on 05/06/2016 then it ISO-8601 format is 2016-05-05T16:00:00.000Z and milliseconds is 1462464000000 . Then user from GMT timezone try to view this event. The date will be 05/05/2016 instead of 05/06

Java Time period in decimal number of years

由 核能气质少年 提交于 2019-12-02 08:43:16
If I calculate the difference between 2 LocalDate 's in java.time using: Period p = Period.between(testDate, today); Then I get an output with the number of years, months, days like: Days = 9 Months = 6 Years = 18 Does anyone know a clean way to represent that as a decimal type value (ie, above would be something around 18.5... )? I would avoid using Period, and instead just calculate the difference in days: float years = testDate1.until(today, ChronoUnit.DAYS) / 365.2425f; You mentioned in one of your comments that you need quarter year precision if you need the current quarter you can use

String to ZonedDateTime is changing format

由 ￣綄美尐妖づ 提交于 2019-12-02 08:12:40
问题 String ip="2011-05-01T06:47:35.422-05:00"; ZonedDateTime mzt = ZonedDateTime.parse(ip).toInstant().atZone(ZoneOffset.UTC); System.out.println(mzt); System.out.println("-----"); String ip2="2011-05-01T00:00:00.000-05:00"; ZonedDateTime mzt2 = ZonedDateTime.parse(ip2).toInstant().atZone(ZoneOffset.UTC); System.out.println(mzt2); Output: 2011-05-01T11:47:35.422Z ----- 2011-05-01T05:00Z Why is the date format getting changed in case 2? I am getting SQLServer Database error due to this. 回答1: This

Save a formatted String to a LocalDate

由 半世苍凉 提交于 2019-12-02 07:18:32
I have a DateConverter class: public class DateConverter extends StringConverter<LocalDate> { String pattern = "EEE, dd. MM. uuuu"; DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern,Locale.US); @Override public String toString(LocalDate object) { try { return formatter.format(object); } catch(Exception ex) { return ""; } } @Override public LocalDate fromString(String string) { try { return LocalDate.parse(string, formatter); } catch(Exception ex) { return null; } } public String getPattern(){ return pattern; } } And I have this piece of code: allProd.forEach((prod) -> {

Converting date without time for different timezone

由 百般思念 提交于 2019-12-02 07:15:13
I store the date in UTC long and displayed in user timezone. But when I try to store only days without time it misleading to different dates. Eg: Scheduling event on 05/06/2016 (06 May 2016). This date is unique for all regions without timezone. If user from GMT+5:30 timezone trying to add a event on 05/06/2016 then it ISO-8601 format is 2016-05-05T16:00:00.000Z and milliseconds is 1462464000000 . Then user from GMT timezone try to view this event. The date will be 05/05/2016 instead of 05/06/2016 . Is there any way to convert date without any timezone. Java 8 provides the solution for your

String to ZonedDateTime is changing format

由 人盡茶涼 提交于 2019-12-02 05:56:57
String ip="2011-05-01T06:47:35.422-05:00"; ZonedDateTime mzt = ZonedDateTime.parse(ip).toInstant().atZone(ZoneOffset.UTC); System.out.println(mzt); System.out.println("-----"); String ip2="2011-05-01T00:00:00.000-05:00"; ZonedDateTime mzt2 = ZonedDateTime.parse(ip2).toInstant().atZone(ZoneOffset.UTC); System.out.println(mzt2); Output: 2011-05-01T11:47:35.422Z ----- 2011-05-01T05:00Z Why is the date format getting changed in case 2? I am getting SQLServer Database error due to this. This is what toString from documentation said The format used will be the shortest that outputs the full value of
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