我正在构建一个 REST 网络服务。某些类具有类型DateTime
(JodaTime) 的属性。
将此对象发送到我的客户端(Javascript)时,我的对象
private DateTime date;
转换为
{ date: { chronology: {}, millis: 1487289600000 } }
问题是将此对象发送回服务器时出错,因为我无法实例化chronology
我想要类似{ date: 1487289600000}
的东西 - 任何其他格式都可以工作。
环境
- 杰克逊注释 2.8.8
- 杰克逊核心 2.8.8
- 杰克逊-数据箱 2.8.8
- 杰克逊-数据类型-乔达 2.8.8
- 乔达时间 2.7
我的上下文解析器是
@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;
}
}
我错过了什么?如果我不使用ObjectMapperContextResolver
我有相同的结果
马佐奇·莫林@Cássio回答后的更新
我添加了jackson-jaxrs-json-provider 2.8.8
、jackson-jaxrs-base 2.8.8
和jackson-module-jaxb-annotations 2.8.8
我的上下文解析器现在是这样的
@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;
}
}
和我的应用程序配置
@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;
}
}
我的服务资源
@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);
}
}
}
和Value
对象
public class Value {
private DateTime date;
private Float value;
public Value() {
}
//getter and setter
}
更新
我在ApplicationConfig
中添加了以下代码
@Override
public Map<String, Object> getProperties() {
Map<String, Object> props = new HashMap<>();
props.put("jersey.config.server.disableMoxyJson", true);
return props;
}
我的DateTime
现在已转换为
"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}
部署后第一次调用服务时,出现此错误
javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: com/fasterxml/jackson/module/jaxb/JaxbAnnotationIntrospector
应用程序中可能缺少jackson-jaxrs-json-provider
模块。
此模块是用于 JAX-RS 实现(如 Jersey 和 RESTeasy)的 Jackson JSON 提供程序。
仅当您需要自定义 Jackson JSON 提供程序的ObjectMapper
时,才需要ObjectMapper
ContextResolver
。但是,如果杰克逊提供商未注册,ContextResolver
将无所事事。
下面是您需要的依赖项:
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>2.8.8</version>
</dependency>
如果不使用 Maven,请将jackson-jaxrs-json-provider-2.8.8.jar
添加到类路径中。
然后根据需要注册JacksonJsonProvider
(仅使用 Jackson 注释)或JacksonJaxbJsonProvider
(同时使用 Jackson 和 JAXB 注释)。