Reputation: 5779
I'm using using Java 5.
I need to parse date-time strings in ISO 8601 format such as 2011-11-30T12:00:00.000+00:00
:
String dateString = "2011-11-30T12:00:00.000+00:00";
DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
Date parsed=null;
try {
parsed = df.parse(dateString);
}
I have also tried this pattern: yyyy-MM-dd'T'HH:mm:ss.SSSz
, but get same result:
java.text.ParseException: Unparseable date: "2011-11-30T12:00:00.000+00:00"
Any ideas?
Upvotes: 3
Views: 3325
Reputation: 79560
java.time
In March 2014, Java 8 introduced the modern, java.time
date-time API which supplanted the error-prone legacy java.util
date-time API. Any new code should use the java.time
API*.
Also, shown below is a notice on the Joda-Time Home Page:
Note that from Java SE 8 onwards, users are asked to migrate to
java.time
(JSR-310) - a core part of the JDK which replaces this project.
Given below is the excerpt from OffsetDateTime#parse
documentation:
Obtains an instance of
OffsetDateTime
from a text string such as2007-12-03T10:15:30+01:00
.The string must represent a valid date-time and is parsed using
DateTimeFormatter.ISO_OFFSET_DATE_TIME
.
Since your text string, 2011-11-30T12:00:00.000+00:00
fully complies with the default format, you do not need to specify any DateTimeFormatter
explicitly.
Demo:
import java.time.*;
public class Main {
public static void main(String[] args) {
OffsetDateTime odt = OffsetDateTime.parse("2011-11-30T12:00:00.000+00:00");
System.out.println(odt);
}
}
Output:
2011-11-30T12:00Z
Note: If for some reason, you need an instance of java.util.Date
, let java.time
API do the heavy lifting of parsing the date-time string and convert odt
from the above code into a java.util.Date
instance using Date date = Date.from(odt.toInstant())
.
Learn more about the modern Date-Time API from Trail: Date Time.
* If you are receiving an instance of java.util.Date
, convert it tojava.time.Instant
, using Date#toInstant
and derive other date-time classes of java.time
from it as per your requirement.
Upvotes: 2
Reputation: 4712
You have to use Joda-Time (Maven) (supports Java 1.5) if you don't want to parse it manually. Just create an object with new DateTime(String)
then you can get Date
via toDate()
method.
Pass the time zone you want assigned to the resulting date-time object. Unlike java.util.Date, a Joda-Time DateTime
object knows its own assigned time zone (DateTimeZone
). If omitted, the JVM’s current default time zone is assigned implicitly.
DateTimeZone zone = DateTimeZone.forID( "America/Montreal" ); // Or perhaps DateTimeZone.UTC
DateTime dateTime = new DateTime( "2011-11-30T12:00:00.000+00:00", zone );
Upvotes: 5
Reputation: 3071
The pattern you have currently used in your SimpleDateFormat
constructor, yyyy-MM-dd'T'HH:mm:ss.SSSZ
, is supposed to accept timestamps in the following format:
2011-11-30T12:00:00.000+0000
however, what you need is something that will handle timestamps such as:
2011-11-30T12:00:00.000+00:00
For this particular purpose, the yyyy-MM-dd'T'HH:mm:ss.SSSXXX
format should be specified in your SimpleDateFormat
(i.e. the problem lies within the formatting of the timestamp's timezone component).
Upvotes: 1
Reputation: 16041
You should remove the colon from +00:00
, as this format only works with the X
pattern, which is not available in Java 5, only from Java SE 7.
More information: RFC822 needs this style (without colon), in ISO 8601 both is correct.
Upvotes: 3