CODEWITHSUNDEEP
javajsonserializationjackson
Patrick
Patrick

Reputation: 12744

Date changed after serialize Object to String with Jackson Json

I am litte bit confused. I need to serialize an Object to a json String. I use Jackson as library.

My Pojo Class Stage has an attribute fromDate and its an util.date.

public class Stage {

@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd.MM.yyyy", timezone="UTC+1")
private Date fromDate;
...

Before serialization the fromDate has this value: Wed May 11 00:00:00 CEST 2016.

My serialize method looks like this:

 public static String serialize(Stages stages) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        String s = objectMapper.writeValueAsString(stages);
        return s;
    }

But after serialize my Object the dateFrom in the json String hast this value: ..."fromDate":"10.05.2016"... . So the Date is wrong.

I used the pattern of @JsonFormat and tried it also with the ObjectMapper configuration. 

public static String serialize(Stages stages) throws JsonProcessingException {
    ObjectMapper objectMapper = new ObjectMapper();
    SimpleDateFormat dateFormat = new SimpleDateFormat(Util.SDF_dd_mm_yyyy);
    objectMapper.setDateFormat(dateFormat);
    dateFormat.setTimeZone(TimeZone.getTimeZone("UTC+1"));
    String s = objectMapper.writeValueAsString(stages);
    return s;
}

But the date is not my expected one: ..."fromDate":"11.05.2016"...

What do I wrong?

Upvotes: 0

Views: 1649

Answers (1)

gsaslis
gsaslis

Reputation: 3176

I think this is just another timezone issue. The serialized date looks like it's in UTC (?), so it's actually correct that you're seeing 10.05, cause 2016-11-05 00:00 UTC+1 is really 2016-10-05 23:00 UTC..

You should probably try adapting the code where you're reading this serialized value to take into account what timezone the date has been serialized in.

Upvotes: 1

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