How to specify a JsonFormat for an Optional using LocalDateSerializer?

Asked Jun 25 '20 at 13:19

Active Jun 25 '20 at 13:19

Viewed 126 times

I have a class like this:

public class Foo {
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
    @JsonSerialize(contentUsing = LocalDateSerializer.class)
    private Optional<LocalDate> localDate;
}

I then serialize the class using an ObjectMapper, registering both Jdk8Module and JavaTimeModule.

However, I'm getting a JSON that I'm not expecting: For LocalDate.of(2020, 4, 1), it gets serialized to the following: (code formatted for clarity)

{
    "localDate": [2020, 4, 1]
}

instead of:

{
    "localDate": "2020-04-01"
}

asked Jun 25 '20 at 13:19

No Ordinary Love

Does this help ? https://stackoverflow.com/questions/28802544/java-8-localdate-jackson-format – Shafin Mahmud Jun 25 '20 at 13:23
No, sorry. I need to use Optional. – No Ordinary Love Jun 25 '20 at 13:25
https://stackoverflow.com/questions/25693309/using-jackson-objectmapper-with-java-8-optional-values – Eklavya Jun 25 '20 at 13:27
No, sorry. That example doesn't use JsonFormat. – No Ordinary Love Jun 25 '20 at 13:28
What version of Jackson do you use already? – tmarwen Jun 25 '20 at 13:32
The latest one: 2.11.0 – No Ordinary Love Jun 25 '20 at 13:38
2

That first link contained the answer, but the one I added as a duplicate is more explicit. You need to disable `WRITE_DATES_AS_TIMESTAMPS`. – Sotirios Delimanolis Jun 25 '20 at 14:31

How to specify a JsonFormat for an Optional using LocalDateSerializer?

0 Answers0