Java RestEasy - 找不到 MessageBodyReader？
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RestEasy - Unable to find MessageBodyReader?
提问by Shadowman
I've written a simple RestEasy client proxy to perform an iTunes search. It looks like this:
我编写了一个简单的 RestEasy 客户端代理来执行 iTunes 搜索。它看起来像这样：
@Path("/")
public interface AppleAppStoreLookupClient {
/**
* Attempts to lookup an apple app store item by its ID
*
* @param id
* The item ID
* @return The app details
*/
@GET
@Path("/lookup")
@Produces(value = { "text/javascript" })
public AppleAppDetailsResponse lookupByID(@QueryParam("id") String id);
}
My JSON model class is simple, as well. In fact, for the first call all I want is the "resultCount" value, just to make sure connectivity works.
我的 JSON 模型类也很简单。事实上，对于第一次调用，我想要的只是“resultCount”值，只是为了确保连接有效。
@XmlRootElement
@XmlAccessorType(XmlAccessType.NONE)
public class AppleAppDetailsResponse implements Serializable {
private static final long serialVersionUID = 8881587082097337598L;
@XmlElement
private int resultCount = -1;
...getters and setters...
}
However, when I run a simple test, I get the following Exception:
但是，当我运行一个简单的测试时，我得到以下异常：
org.jboss.resteasy.client.ClientResponseFailure: Unable to find a MessageBodyReader of content-type text/javascript;charset="utf-8" and type class net.odyssi.mms.appstore.apple.AppleAppDetailsResponse
at org.jboss.resteasy.client.core.BaseClientResponse.createResponseFailure(BaseClientResponse.java:523)
at org.jboss.resteasy.client.core.BaseClientResponse.createResponseFailure(BaseClientResponse.java:514)
at org.jboss.resteasy.client.core.BaseClientResponse.readFrom(BaseClientResponse.java:415)
at org.jboss.resteasy.client.core.BaseClientResponse.getEntity(BaseClientResponse.java:377)
at org.jboss.resteasy.client.core.BaseClientResponse.getEntity(BaseClientResponse.java:350)
at org.jboss.resteasy.client.core.extractors.BodyEntityExtractor.extractEntity(BodyEntityExtractor.java:62)
at org.jboss.resteasy.client.core.ClientInvoker.invoke(ClientInvoker.java:126)
at org.jboss.resteasy.client.core.ClientProxy.invoke(ClientProxy.java:88)
at $Proxy21.lookupByID(Unknown Source)
at net.odyssi.mms.appstore.apple.test.AppleAppStoreLookupClientTest.testLookupByID(AppleAppStoreLookupClientTest.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access <dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jettison-provider</artifactId>
<version>2.3.6.Final</version>
</dependency>
0(ParentRunner.java:50)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
I'm running RestEasy 2.3.6. Any idea what could be causing such an error?
我正在运行 RestEasy 2.3.6。知道什么可能导致这样的错误吗？
采纳答案by eiden
Do you have a json provider on your classpath? If you are using maven, try adding this dependency:
你的类路径上有 json 提供者吗？如果您使用的是 maven，请尝试添加此依赖项：
ResteasyProviderFactory factory = new ResteasyProviderFactory();
RegisterBuiltin.register(factory);
factory.getClientExecutionInterceptorRegistry().register(
new ClientExecutionInterceptor() {
@Override
public ClientResponse execute(ClientExecutionContext ctx) throws Exception {
ClientResponse response = ctx.proceed();
if("text/javascript".equals(response.getHeaders().getFirst(HttpHeaders.CONTENT_TYPE))){
response.getHeaders().putSingle(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
}
return response;
}
});
ProxyFactory.create(Service.class, URI.create("http://url-to-your-sevice"), new ApacheHttpClient4Executor(), factory);
http://docs.jboss.org/resteasy/docs/2.3.6.Final/userguide/html_single/#JAXB_+_JSON_provider
http://docs.jboss.org/resteasy/docs/2.3.6.Final/userguide/html_single/#JAXB_+_JSON_provider
EDIT:
编辑：
Normally, one would use the content type application/jsonand not text/javascript. I'm not sure why you are using text/javascript?
通常，人们会使用内容类型application/json而不是text/javascript. 我不确定你为什么使用text/javascript？
Anyways, if your endpoint returns only text/javascript, you can always modify the Content-Type-header in an interceptor:
无论如何，如果您的端点只返回text/javascript，您可以随时修改Content-Type拦截器中的-header ：
