（德）與傑克遜序列化日期時間（喬達）

Question

我正在構建一個REST web服務。某些類具有DateTime（JodaTime）類型的屬性。

當發送該對象到我的客戶端（JavaScript）的，我的對象

private DateTime date; 

轉化爲

{ date: { chronology: {}, millis: 1487289600000 } } 

的問題是，我在發送對象時返回給服務器有一個錯誤因爲我不能實例化chronology

我想有類似{ date: 1487289600000} - 任何其他格式可以工作。

環境

• 傑克遜 - 註解2.8.8
• 傑克遜核2.8.8
• 傑克遜 - databin 2.8.8
• 傑克遜 - 數據類型 - 約達2.8.8
• joda-time 2.7

我的上下文解析器

@Provider 
public class ObjectMapperContextResolver implements ContextResolver<ObjectMapper> { 

    final ObjectMapper mapper = new ObjectMapper(); 

    public ObjectMapperContextResolver() { 
     mapper.registerModule(new JodaModule()); 
     mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false); 
    } 

    @Override 
    public ObjectMapper getContext(Class<?> type) { 
     return mapper; 
    } 
} 

我缺少什麼？如果我不使用ObjectMapperContextResolver我有同樣的結果

更新以下@卡西奧Mazzochi莫林的回答

我加jackson-jaxrs-json-provider 2.8.8，jackson-jaxrs-base 2.8.8和jackson-module-jaxb-annotations 2.8.8

我的上下文解析器現在這個樣子

@Provider 
public class ObjectMapperContextResolver implements ContextResolver<ObjectMapper> { 

    final ObjectMapper mapper = new ObjectMapper(); 

    public ObjectMapperContextResolver() { 
     mapper.registerModule(new JodaModule()); 
     mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false); 
    } 

    @Override 
    public ObjectMapper getContext(Class<?> type) { 
     return mapper; 
    } 
} 

和我的應用程序配置

@javax.ws.rs.ApplicationPath("/") 
public class ApplicationConfig extends Application { 
    @Override 
    public Set<Class<?>> getClasses() { 
     Set<Class<?>> resources = new java.util.HashSet<>(); 
     resources.add(AuthenticationFilter.class); 
     resources.add(CORSFilter.class); 
     resources.add(ObjectMapperContextResolver.class); 
     resources.add(JacksonJsonProvider.class); 
     resources.add(ServiceResource.class); 
     return resources; 
    } 
} 

我serviceResource

@Path("service") 
public class ServiceResource { 

    @Path("/forecast/stocks/{modelId}") 
    @GET 
    @Produces(MediaType.APPLICATION_JSON) 
    public List<Value> getStocks(@PathParam("modelId") String modelId, @QueryParam("startDate") String startDate, @QueryParam("endDate") String endDate) { 
     try { 
      DateTime datetimeStart = formatStringToDatetime(startDate); 
      DateTime datetimeEnd = formatStringToDatetime(endDate); 
      return logicClass.getStocks(modelId, datetimeStart, datetimeEnd); 
     } catch (Exception e) { 
      logger.log(Level.SEVERE, "Error calling /hydromax/forecast/stocks", e); 
      throw new WebApplicationException(Response.Status.INTERNAL_SERVER_ERROR); 
     } 
    } 

} 

而且Value對象

public class Value { 

    private DateTime date; 
    private Float value; 

    public Value() { 
    } 

    //getter and setter 

} 

更新

我加入以下代碼裏面ApplicationConfig

@Override 
public Map<String, Object> getProperties() { 
    Map<String, Object> props = new HashMap<>(); 
    props.put("jersey.config.server.disableMoxyJson", true); 
    return props; 
} 

我DateTime現在轉化爲

"date":{"dayOfMonth":16,"dayOfWeek":4,"era":1,"year":2017,"dayOfYear":47,"weekOfWeekyear":7,"secondOfMinute":0,"millisOfSecond":0,"weekyear":2017,"monthOfYear":2,"hourOfDay":10,"minuteOfHour":0,"yearOfEra":2017,"yearOfCentury":17,"centuryOfEra":20,"millisOfDay":36000000,"secondOfDay":36000,"minuteOfDay":600,"millis":1487235600000,"zone":{"fixed":false,"uncachedZone":{"fixed":false,"cachable":true,"id":"Europe/Paris"},"id":"Europe/Paris"},"chronology":{"zone":{"fixed":false,"uncachedZone":{"fixed":false,"cachable":true,"id":"Europe/Paris"},"id":"Europe/Paris"}},"afterNow":false,"beforeNow":true,"equalNow":false} 

並在第一時間我稱之爲部署後的服務，我有這樣的錯誤

javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: com/fasterxml/jackson/module/jaxb/JaxbAnnotationIntrospector

Answer 1

你可能會丟失在應用程序中jackson-jaxrs-json-provider模塊。

該模塊是JAX-RS實現的Jackson JSON提供程序，例如Jersey和RESTeasy。

A ContextResolver對於ObjectMapper僅在您需要爲Jackson JSON提供程序自定義ObjectMapper時才需要。但是，如果Jackson提供者沒有註冊，ContextResolver將不會執行任何操作。

---

這裏有您需要的依賴關係：

<dependency> 
    <groupId>com.fasterxml.jackson.jaxrs</groupId> 
    <artifactId>jackson-jaxrs-json-provider</artifactId> 
    <version>2.8.8</version> 
</dependency> 

如果你不使用Maven，添加jackson-jaxrs-json-provider-2.8.8.jar到classpath中。

然後根據您的需要註冊JacksonJsonProvider（僅使用Jackson註釋）或JacksonJaxbJsonProvider（使用Jackson和JAXB註釋）。