OffsetDateTime以错误的格式返回日期时间

Question

我使用Spring 4.3.4，Jackson 2.8.6和Tomcat 8.5.11。我有一些REST API：

@RestController
@RequestMapping(value = "/netadvice")
public class NetworkAdviceController {

    ...

    @RequestMapping(
            value = "/offsetDateTime", 
            method = RequestMethod.GET, 
            produces = MediaType.APPLICATION_JSON_VALUE)
    public OffsetDateTime todayOffsetDateTime() {
        return OffsetDateTime.now();
    }
}

致电/netadvice/offsetDateTime后，我希望以下列格式收到日期时间：2017-02-14T08:46:06.102Z但我收到的内容如下：1487062454.957000000。

我错了什么以及如何解决此问题？

以下代码是我的自定义日期时间序列化程序和反序列化程序：

@Configuration
public class JsonConfig {

    public static final DateTimeFormatter FORMATTER = ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");

    @Bean
    @Primary
    public ObjectMapper objectMapper() {

        ObjectMapper objectMapper = new ObjectMapper();
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        javaTimeModule.addSerializer(OffsetDateTime.class, new OffsetDateTimeSerializer());
        javaTimeModule.addDeserializer(OffsetDateTime.class, new OffsetdateTimeDeserializer());
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);      
        objectMapper.registerModule(javaTimeModule);    
        return objectMapper;
    }

    public class OffsetDateTimeSerializer extends JsonSerializer<OffsetDateTime> {
        @Override
        public void serialize(OffsetDateTime value, JsonGenerator gen, SerializerProvider serializers)
                throws IOException {

            gen.writeString(value.format(FORMATTER));
        }
    }

    public class OffsetdateTimeDeserializer extends JsonDeserializer<OffsetDateTime> {
        @Override
        public OffsetDateTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {

            return OffsetDateTime.parse(p.getValueAsString(), FORMATTER);
        }
    }
}