In response to http://stackoverflow.com/q/39170405/466738

JodaTimeSerializationTest.java

public class JodaTimeSerializationTest {
    @Test
    public void serializeDateTime() throws JsonProcessingException {
        DateTime dateTime = DateTime.parse("2016-01-01T00:00:00Z");
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.registerModule(new JodaModule());
        objectMapper.configure(WRITE_DATES_AS_TIMESTAMPS , false);
        System.out.println(objectMapper.writeValueAsString(dateTime)); // prints "2016-01-01T00:00:00.000Z"
    }
}