How to set format of string for java.time.Instant using objectMapper?

Question

I have an entity with java.time.Instant for created data field:

@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@EqualsAndHashCode
public         


        

Answer 1

In my case it was enough to register the JavaTimeModule:

  ObjectMapper objectMapper = new ObjectMapper();
  JavaTimeModule module = new JavaTimeModule();
  objectMapper.registerModule(module);

  messageObject = objectMapper.writeValueAsString(event);

In the event Object I have a field of type Instant.

In the deserialization you also need to register the java time module:

ObjectMapper objectMapper = new ObjectMapper().registerModule(new JavaTimeModule());

Event event = objectMapper.readValue(record.value(), Event.class);