How do I change simpledateformat to jodatime?

I need to change simpledateformat to another format, which is equivalent in jodatime

public static String dateFormat(Date date,String format)
{
    SimpleDateFormat sdf = new SimpleDateFormat(format);
    return sdf.format(date);
}

I tried using datetimeformatter

public static String dateFormat(DateTime date,String format)
{
    DateTimeFormatter dtf = DateTimeFormat.forPattern(format);
    DateTime tempDateTime =  dtf.parseDateTime(date.toString());
    return tempDateTime.toString();
}

But I got it wrong

Solution

Well, I found you in the documents of joda time and simpledateformat As you can see there, unfortunately the schema definitions are not the same If you translate from simpledateformat to joda - datetimeformat, you must pay attention to the following:

Change y to X (so-called week – year)

Change y to y (age) and possibly change the chronology (from ISO to Gregory / Julian)

Joda time (month) does not support W, so it does not need to be replaced!

F is not supported in joda time (day of the week), so there is no need to replace it!

Change java to e (weeks – ISO orders, not localized), available from Java 7

The symbol s is handled differently (I think it's better in joda time because of the correct zero padding)

The zone symbol Z does not allow parsing in joda time (this may be the current cause of your problem - you have not displayed your schema format or your exceptions)

The area / offset symbol Z is handled better in joda time, such as allowing colons in colons, etc If you need the latter, you can use X in simpledateformat, which has a replacement Z in joda time

Some tests added:

The following example code demonstrates the different handling of the format symbol s

String s = "2014-01-15T14:23:50.026";
DateTimeFormatter dtf = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSSS");

DateTime instant = dtf.parseDateTime(s);
System.out.println(dtf.print(instant)); // 2014-01-15T14:23:50.0260

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSS");
Date date = sdf.parse(s);
System.out.println(sdf.format(date)); // 2014-01-15T14:23:50.0026 (bad!)

Another test of format symbol Z (your question???):

String s = "2014-01-15T14:23:50.026PST";
DateTimeFormatter dtf = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSSz");

DateTime instant = dtf.parseDateTime(s);
System.out.println(dtf.print(instant)); // abort

Exception in thread "main" java.lang.IllegalArgumentException: Invalid format: "2014-01-15T14:23:50.026PST" is malformed at "PST"
    at org.joda.time.format.DateTimeFormatter.parseDateTime(DateTimeFormatter.java:866)
    at time.JodaTest8.main(JodaTest8.java:83)

Simpledateformat can perform this zone name resolution (although sometimes at least dangerous):

String s = "2014-01-15T14:23:50.026PST";

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSz");
Date date = sdf.parse(s);
System.out.println(sdf.format(date)); // 2014-01-15T14:23:50.026PST