JacksonDateTest.java

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.Provider;

import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;

/**
 *  <dependency>
 *    <groupId>org.glassfish.jersey.media</groupId>
 *    <artifactId>jersey-media-json-jackson</artifactId>
 *  </dependency>
 *
 *  <dependency>
 *    <groupId>org.glassfish.jersey.inject</groupId>
 *    <artifactId>jersey-hk2</artifactId>
 *  </dependency>
 *
 *  <dependency>
 *    <groupId>org.glassfish.jersey.test-framework.providers</groupId>
 *    <artifactId>jersey-test-framework-provider-grizzly2</artifactId>
 *  </dependency>
 */
public class JacksonDateTest extends JerseyTest {

    static class DateUtils {
        static String ISO_DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";
    }

    @Provider
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public static class JacksonProvider extends JacksonJaxbJsonProvider {

        public static final ObjectMapper mapper;

        static {
            mapper = new ObjectMapper()
                    // DateUtils.ISO_DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
                    .setDateFormat(new SimpleDateFormat(DateUtils.ISO_DATE_FORMAT, Locale.getDefault()))
                    .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
                    .setSerializationInclusion(JsonInclude.Include.NON_NULL);
        }

        public JacksonProvider() {
            super();
            setMapper(mapper);
        }
    }

    @Override
    public ResourceConfig configure() {
        return new Application();
    }

    public class Application extends ResourceConfig {
        public Application() {
            register(JacksonProvider.class);
            register(ExampleEndpoint.class);
        }
    }

    @Path("/example")
    public static class ExampleEndpoint {

        @GET
        @Produces(MediaType.APPLICATION_JSON)
        public Response getTimestamp() {
            try {
                Map<String, Object> response = new HashMap<>();

                response.put("current_timestamp", new Date());

                return Response.ok(response).build();
            } catch (Exception e) {
                return Response.serverError().entity(e).build();
            }
        }
    }

    @Test
    public void testIt() {
        String res = target("example").request().get(String.class);
        System.out.println(res);
    }
}