hguser hguser - 1 year ago 211
Java Question

Illegal pattern character 'T' when parsing a date string to java.util.Date

I have a date string and I want to parse it to normal date use the java Date API,the following is my code:

public static void main(String[] args) {
String date="2010-10-02T12:23:23Z";
String pattern="yyyy-MM-ddThh:mm:ssZ";
SimpleDateFormat sdf=new SimpleDateFormat(pattern);
try {
Date d=sdf.parse(date);
} catch (ParseException e) {
// TODO Auto-generated catch block

However I got an exception:
java.lang.IllegalArgumentException: Illegal pattern character 'T'

So I wonder if I have to split the string and parse it manually?

BTW, I have tried to add a single quote character on either side of the T:

String pattern="yyyy-MM-dd'T'hh:mm:ssZ";

It also does not work.

Answer Source

This works with the input with the trailing Z as demonstrated:

In the pattern the T is escaped with ' on either side.

The pattern for the Z at the end is actually XXX as documented in the JavaDoc for SimpleDateFormat, it is just not very clear on actually how to use it since Z is the marker for the old TimeZone information as well.


import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

public class Q2597083
     * All Dates are normalized to UTC, it is up the client code to convert to the appropriate TimeZone.
    public static final TimeZone UTC;

     * @see <a href="http://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations">Combined Date and Time Representations</a>
    public static final String ISO_8601_24H_FULL_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX";

     * 0001-01-01T00:00:00.000Z
    public static final Date BEGINNING_OF_TIME;

     * 292278994-08-17T07:12:55.807Z
    public static final Date END_OF_TIME;

        UTC = TimeZone.getTimeZone("UTC");
        final Calendar c = new GregorianCalendar(UTC);
        c.set(1, 0, 1, 0, 0, 0);
        c.set(Calendar.MILLISECOND, 0);
        BEGINNING_OF_TIME = c.getTime();
        c.setTime(new Date(Long.MAX_VALUE));
        END_OF_TIME = c.getTime();

    public static void main(String[] args) throws Exception

        final SimpleDateFormat sdf = new SimpleDateFormat(ISO_8601_24H_FULL_FORMAT);
        System.out.println("sdf.format(BEGINNING_OF_TIME) = " + sdf.format(BEGINNING_OF_TIME));
        System.out.println("sdf.format(END_OF_TIME) = " + sdf.format(END_OF_TIME));
        System.out.println("sdf.format(new Date()) = " + sdf.format(new Date()));
        System.out.println("sdf.parse(\"2015-04-28T14:23:38.521Z\") = " + sdf.parse("2015-04-28T14:23:38.521Z"));
        System.out.println("sdf.parse(\"0001-01-01T00:00:00.000Z\") = " + sdf.parse("0001-01-01T00:00:00.000Z"));
        System.out.println("sdf.parse(\"292278994-08-17T07:12:55.807Z\") = " + sdf.parse("292278994-08-17T07:12:55.807Z"));

Produces the following output:

sdf.format(BEGINNING_OF_TIME) = 0001-01-01T00:00:00.000Z
sdf.format(END_OF_TIME) = 292278994-08-17T07:12:55.807Z
sdf.format(new Date()) = 2015-04-28T14:38:25.956Z
sdf.parse("2015-04-28T14:23:38.521Z") = Tue Apr 28 14:23:38 UTC 2015
sdf.parse("0001-01-01T00:00:00.000Z") = Sat Jan 01 00:00:00 UTC 1
sdf.parse("292278994-08-17T07:12:55.807Z") = Sun Aug 17 07:12:55 UTC 292278994
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