java.util.date to String using DateTimeFormatter

Question

How can I convert a java.util.Date to String using

 DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss")

The Date object which I get is passed

DateTime now = new DateTime(date);

Possible duplicate of: http://stackoverflow.com/questions/5683728/convert-java-util-date-to-string — Peter, Feb 13 '17 at 17:48
@CorkKochi If you are on Java 8 you should consider using the new java time api instead of the legacy Date api or joda time. — assylias, Feb 13 '17 at 18:00
not clear for me, is DateTimeFormatter comming from java.time.format.DateTimeFormatter; or org.joda.time.format.DateTimeFormatter??? — ΦXocę 웃 Пepeúpa ツ, Feb 13 '17 at 18:02
I assume it's Joda, but I don't know why it's tagged `java-8`. — shmosel, Feb 13 '17 at 18:04
It's not clear what you're trying to do. Joda, Java and Java 8 have separate date libraries, with their own formatting and parsing mechanisms, all of which are well documented on this site and elsewhere. What exactly are you looking for? — shmosel, Feb 13 '17 at 18:15
@shmosel can you tell how it can be done in java8, I searched but I couldnt find — Cork Kochi, Feb 13 '17 at 18:18
FYI: The [Joda-Time](http://www.joda.org/joda-time/) project, now in [maintenance mode](https://en.wikipedia.org/wiki/Maintenance_mode), advises migration to the [java.time](https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html) classes. — Basil Bourque, Feb 13 '17 at 21:01

score 30 · Answer 1 · edited Nov 16 '17 at 17:07

If you are using Java 8, you should not use java.util.Date in the first place (unless you receive the Date object from a library that you have no control over).

In any case, you can convert a Date to a java.time.Instant using:

Date date = ...;
Instant instant = date.toInstant();

Since you are only interested in the date and time, without timezone information (I assume everything is UTC), you can convert that instant to a LocalDateTime object:

LocalDateTime ldt = instant.atOffset(ZoneOffset.UTC).toLocalDateTime();

Finally you can print it with:

DateTimeFormatter fmt = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
System.out.println(ldt.format(fmt));

Or use the predefined formatter, DateTimeFormatter.ISO_LOCAL_DATE_TIME.

System.out.println(ldt.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME));

Note that if you don't provide a formatter, calling ldt.toString gives output in standard ISO 8601 format (including milliseconds) - that may be acceptable for you.

@CorkKochi If you *must* use a `java.util.Date` object, convert as shown in this Answer. See new conversion methods added to the old classes, such as [`Date.from( Instant )`](https://docs.oracle.com/javase/8/docs/api/java/util/Date.html#from-java.time.Instant-) and [`Date::toInstant()`](https://docs.oracle.com/javase/8/docs/api/java/util/Date.html#toInstant--). — Basil Bourque, Feb 13 '17 at 20:56

score 1 · Answer 2 · edited Jul 24 '18 at 23:16

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DateTime dt = new DateTime(date);
DateTimeFormatter dtf = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss");
dt.toString(dtf)

edited Jul 24 '18 at 23:16

Madbreaks

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answered Feb 13 '17 at 18:23

Cork Kochi

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`dt.toString(DateTimeFormatter.ISO_INSTANT)` – Madbreaks Jul 24 '18 at 23:16

score 0 · Answer 3 · answered Feb 13 '17 at 18:06

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since I asume you are using joda API: ergo, DateTimeFormatter is comming from org.joda.time.format.DateTimeFormatter:

 String dateTime = "02-13-2017 18:20:30";
// Format for input
DateTimeFormatter dtf = DateTimeFormat.forPattern("MM-dd-yyyy HH:mm:ss");
// Parsing the date
DateTime jodatime = dtf.parseDateTime(dateTime);

System.out.println(jodatime );

answered Feb 13 '17 at 18:06

ΦXocę 웃 Пepeúpa ツ

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@CorkKochi I hope you're not actually calling `new DateTime(new Date())`. – shmosel Feb 13 '17 at 18:12
@shmosel I posted the answer – Cork Kochi Feb 13 '17 at 18:23

score 0 · Answer 4 · edited Mar 18 '18 at 22:26

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DateTimeFormatterOBJECT=DateTimeFormatter.ofPattern("DD/MMM/YYYY HH//MM/SS");

String MyDateAndTime= LocalDate.now().format(DateTimeFormatterOBJECT);

edited Mar 18 '18 at 22:26

Eric

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answered Jan 18 '18 at 17:18

RANA DINESH

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You can use above code to get simple date in your own format by specifying the format in first line of code and you can also use any plus or minus date function in 2nd line of code ; – RANA DINESH Jan 18 '18 at 17:23
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To add clarifications to your answer, please edit your answer instead of using comments. – Hexfire Jan 18 '18 at 17:45

score 0 · Answer 5 · edited Nov 29 '19 at 05:01

0

You can use the joda time formatter class:

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
# conflict with import java.time.format.DateTimeFormatter;

final DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss")
            .withZone(DateTimeZone.UTC);

    System.out.println(DateTime.now().toString(formatter));

edited Nov 29 '19 at 05:01

dkb

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answered Aug 13 '18 at 19:49

Archmede

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You can also use `withZoneUTC()` instead of `withZone(DateTimeZone.UTC)` which results in an unnecessary import of `DateTimeZone` class. – nabster Feb 10 '19 at 21:07

score 0 · Answer 6 · answered Feb 13 '21 at 07:19

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java.util.Date date = new java.util.Date(System.currentTimeMillis());
Instant instant = date.toInstant();

LocalDateTime ldt = instant.atZone(ZoneId.systemDefault()).toLocalDateTime();

DateTimeFormatter fmt = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm:ss");
System.out.println(ldt.format(fmt));

answered Feb 13 '21 at 07:19

Adrian Faur

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While this code may provide a solution to the question, it's better to add context as to why/how it works. This can help future users learn and eventually apply that knowledge to their own code. You are also likely to have positive-feedback/upvotes from users, when the code is explained. – Amit Verma Feb 13 '21 at 09:00

java.util.date to String using DateTimeFormatter

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