Java 8 LocalDate Jackson format

I was never able to get this to work simple using annotations. To get it to work, I created a ContextResolver for ObjectMapper, then I added the JSR310Module (update: now it is JavaTimeModule instead), along with one more caveat, which was the need to set write-date-as-timestamp to false. See more at the documentation for the JSR310 module. Here's an example of what I used.

Dependency

<dependency>    <groupId>com.fasterxml.jackson.datatype</groupId>    <artifactId>jackson-datatype-jsr310</artifactId>    <version>2.4.0</version></dependency>

^{Note: One problem I faced with this is that the jackson-annotation version pulled in by another dependency, used version 2.3.2, which cancelled out the 2.4 required by the jsr310. What happened was I got a NoClassDefFound for ObjectIdResolver, which is a 2.4 class. So I just needed to line up the included dependency versions}

ContextResolver

import com.fasterxml.jackson.databind.ObjectMapper;import com.fasterxml.jackson.databind.SerializationFeature;import com.fasterxml.jackson.datatype.jsr310.JSR310Module;import javax.ws.rs.ext.ContextResolver;import javax.ws.rs.ext.Provider;@Providerpublic class ObjectMapperContextResolver implements ContextResolver<ObjectMapper> {      private final ObjectMapper MAPPER;    public ObjectMapperContextResolver() {        MAPPER = new ObjectMapper();        // Now you should use JavaTimeModule instead        MAPPER.registerModule(new JSR310Module());        MAPPER.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);    }    @Override    public ObjectMapper getContext(Class<?> type) {        return MAPPER;    }  }

Resource class

@Path("person")public class LocalDateResource {    @GET    @Produces(MediaType.APPLICATION_JSON)    public Response getPerson() {        Person person = new Person();        person.birthDate = LocalDate.now();        return Response.ok(person).build();    }    @POST    @Consumes(MediaType.APPLICATION_JSON)    public Response createPerson(Person person) {        return Response.ok(                DateTimeFormatter.ISO_DATE.format(person.birthDate)).build();    }    public static class Person {        public LocalDate birthDate;    }}

Test

curl -v http://localhost:8080/api/person
Result: {"birthDate":"2015-03-01"}

curl -v -POST -H "Content-Type:application/json" -d "{\"birthDate\":\"2015-03-01\"}" http://localhost:8080/api/person
Result: 2015-03-01

See also here for JAXB solution.

UPDATE

The JSR310Module is deprecated as of version 2.7 of Jackson. Instead, you should register the module JavaTimeModule. It is still the same dependency.

@JsonSerialize and @JsonDeserialize worked fine for me. They eliminate the need to import the additional jsr310 module:

@JsonDeserialize(using = LocalDateDeserializer.class)  @JsonSerialize(using = LocalDateSerializer.class)  private LocalDate dateOfBirth;

Deserializer:

public class LocalDateDeserializer extends StdDeserializer<LocalDate> {    private static final long serialVersionUID = 1L;    protected LocalDateDeserializer() {        super(LocalDate.class);    }    @Override    public LocalDate deserialize(JsonParser jp, DeserializationContext ctxt)            throws IOException, JsonProcessingException {        return LocalDate.parse(jp.readValueAs(String.class));    }}

Serializer:

public class LocalDateSerializer extends StdSerializer<LocalDate> {    private static final long serialVersionUID = 1L;    public LocalDateSerializer(){        super(LocalDate.class);    }    @Override    public void serialize(LocalDate value, JsonGenerator gen, SerializerProvider sp) throws IOException, JsonProcessingException {        gen.writeString(value.format(DateTimeFormatter.ISO_LOCAL_DATE));    }}

ObjectMapper mapper = new ObjectMapper();mapper.registerModule(new JavaTimeModule());mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);