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我知道对于应用程序类型问题未找到错误“MessageBodyProvider”已经被问了很多时间，但我的情况有点不同。

当我通过 Fiddler 或在浏览器中手动调用 REST API 时，REST 工作正常。因此，测试似乎有些奇怪。我无法理解这一点。

org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=application/json, type=class xxxx.observer.Observer, genericType=class xxxxx.observer.Observer.
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:248)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:163)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1135)   at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:248)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:163)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1135)
    at org.glassfish.jersey.client.ClientRequest.doWriteEntity(ClientRequest.java:516)
    at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:498)
    at org.glassfish.jersey.client.internal.HttpUrlConnector._apply(HttpUrlConnector.java:384)
    at org.glassfish.jersey.client.internal.HttpUrlConnector.apply(HttpUrlConnector.java:282)
    at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:278)
    at org.glassfish.jersey.client.JerseyInvocation.lambda$invoke$0(JerseyInvocation.java:753)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:316)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:298)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:229)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:414)
    at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:752)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:445)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.post(JerseyInvocation.java:351)

我有一个自定义 Json 提供程序（Gson）和我的测试类：

public class AppTest extends JerseyTest {
    @Override
    protected Application configure() {
        String directory = "src/test/resources/de/xxxx";

        ResourceConfig resourceConfig = new ResourceConfig(GenericExceptionMapper.class, ScenarioProtocolResource.class,
                CloudlistResource.class, GsonJerseyProvider.class, CORSFilter.class, EncodingFilter.class,
                GZipEncoder.class, DeflateEncoder.class);
        Map<String, String> properties = new HashMap<>();

        properties.put("directory", directory);
        resourceConfig.setProperties(properties);

        return resourceConfig;
    }

在我的测试类中，我只是尝试做一个 POST 请求：

Response resp = target("json/proto/observer/add/xxxxx").request(MediaType.APPLICATION_JSON).post(Entity.entity(observer, MediaType.APPLICATION_JSON));
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1 回答 1

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您只是在configure()方法中在服务器端注册提供程序。您仍然需要在客户端注册它。您可以在堆栈跟踪中看到问题发生在客户端（请参阅client包名称）。

您可以仅在 上注册提供程序，WebTarget也可以覆盖configureClient()以将其注册到Client.

Response resp = target("json/proto/observer/add/xxxxx")
        .register(GsonJsonProvider.class)
        ...

或者

@Override
public void configureClient(ClientConfig config) {
    config.register(GsonJsonProvider.class);
}

后者的好处是你不需要WebTarget在每次测试中都注册它。

于 2018-04-14T01:54:04.447 回答