Java.time (Java 8) support in Freemarker

Question

Does anybody know of any plans to support the new java.time api in FreeMarker? Or has anybody code laying around for supporting classes like ZonedDateTime, LocalDateTime and

Answer 1

Let's assume that you want format new date/time objects

1. Create custom method:

   public static class FormatDateTimeMethodModel 
           implements TemplateMethodModelEx {
       public Object exec(List args) throws TemplateModelException {
           if (args.size() != 2) {
               throw new TemplateModelException("Wrong arguments");
           }
           TemporalAccessor time = (TemporalAccessor) ((StringModel) args.get(0)).getWrappedObject();
           DateTimeFormatter formatter = DateTimeFormatter.ofPattern(((SimpleScalar) args.get(1)).getAsString());
           return formatter.format(time);
       }
   }
   

2. Put this method into template model:

   templateModel.put("formatDateTime", new FormatDateTimeMethodModel());

3. And invoke this method inside of template:

   ${formatDateTime(MY_DATE, 'HH:mm')}