Question

我正在使用Jersey 2.8 Client将数据发布到RESTful端点。代码看起来像

    final Client client = ClientBuilder.newClient();
    final WebTarget target = client.target(url).path("inventorySummary");
    final Invocation.Builder builder = target.request().header("Content-Type", MediaType.APPLICATION_JSON);

    final ObjectNode payload = getObjectMapper().createObjectNode();
    payload.put("startDate", DateTime.now().toString());
    payload.put("endDate", DateTime.now().plusDays(30).toString());
    payload.put("networkId", 0);

    final Response response = builder.accept(MediaType.APPLICATION_JSON).post(Entity.entity(payload, MediaType.APPLICATION_JSON));
    assertStatus(Response.Status.OK.getStatusCode(), response);
    final JsonNode jsonReply = parseResponse(response);

getObjectMapper（）看起来像

public ObjectMapper getObjectMapper() {
        return new ObjectMapper()
                .configure(SerializationConfig.Feature.WRITE_DATES_AS_TIMESTAMPS, false /* force ISO8601 */)
                .configure(SerializationConfig.Feature.WRITE_ENUMS_USING_TO_STRING, true)
                .configure(DeserializationConfig.Feature.READ_ENUMS_USING_TO_STRING, true)
                .setSerializationInclusion(JsonSerialize.Inclusion.ALWAYS);
    }

当我尝试运行测试时，我将错误视为

MessageBodyWriter not found for media type=application/json, type=class org.codehaus.jackson.node.ObjectNode, genericType=class org.codehaus.jackson.node.ObjectNode

我在这里缺少什么？

由于

Answer 1

如果你使用Jackson 1.x，那么你需要做以下三件事。

<强> 1。将Jersey Jackson添加到您的pom.xml：

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>2.8</version>
</dependency>

<强> 2。创建ContextResolver：

@Provider
public class ObjectMapperProvider implements ContextResolver<ObjectMapper> {

    final ObjectMapper defaultObjectMapper;

    public ObjectMapperProvider() {
        defaultObjectMapper = getObjectMapper();
    }

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

    public static ObjectMapper getObjectMapper() {
        return new ObjectMapper()
                .configure(SerializationConfig.Feature.WRITE_DATES_AS_TIMESTAMPS, false /* force ISO8601 */)
                .configure(SerializationConfig.Feature.WRITE_ENUMS_USING_TO_STRING, true)
                .configure(DeserializationConfig.Feature.READ_ENUMS_USING_TO_STRING, true)
                .setSerializationInclusion(JsonSerialize.Inclusion.ALWAYS);
    }
}

第3。使用ClientBuilder注册提供商：

final Client client = ClientBuilder.newBuilder()
        .register(ObjectMapperProvider.class)
        .register(JacksonFeature.class)
        .build();

final WebTarget target = client.target(url).path("inventorySummary");

final ObjectNode payload = ObjectMapperProvider.getObjectMapper().createObjectNode();
payload.put("startDate", DateTime.now().toString());
payload.put("endDate", DateTime.now().plusDays(30).toString());
payload.put("networkId", 0);

final Response response = target.request(MediaType.APPLICATION_JSON)
                                .post(Entity.json(payload));

assertStatus(Response.Status.OK.getStatusCode(), response);

Answer 2

我在上面添加了一条评论，说明X的添加有效。

但是，将以下maven依赖项添加到pom.xml也可以，并且看起来像是一个更标准的修复。

     <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-moxy</artifactId>
    </dependency>

注意： org.glassfish.jersey.archetypes / jersey-quickstart-grizzly maven原型默认情况下会添加上面的依赖项，但是注释“取消注释以获取JSON支持“

Answer 3

我在尝试从运行PHP的Apache服务器获取响应时遇到了同样的问题。我对服务器的反应很好，但Spring抱怨找不到类型为application / json的MessageBodyWriter。我将Genson依赖项添加到我的pom.xml中并修复了它！

    <dependency>
        <groupId>com.owlike</groupId>
        <artifactId>genson</artifactId>
        <version>0.99</version>
    </dependency>

可在以下网址找到文档：https://code.google.com/p/genson/

Answer 4

尝试将ObjectNode编写为String：

// your code
final ObjectNode payload = getObjectMapper().createObjectNode();
payload.put("startDate", DateTime.now().toString());
payload.put("endDate", DateTime.now().plusDays(30).toString());
payload.put("networkId", 0);

// the solution
String entity = getObjectMapper().writeValueAsString(payload);

final Response response = builder.accept(MediaType.APPLICATION_JSON).post(Entity.entity(entity, MediaType.APPLICATION_JSON));

Jersey：找不到媒体类型= application / json的MessageBodyWriter，类型= class org.codehaus.jackson.node.ObjectNode？

4 个答案: