java - com.sun.jersey.api.client.ClientHandlerException

Question

我在 REST 应用程序中使用 Jersey。我需要用 junit 来测试它。但我得到了一个com.sun.jersey.api.client.ClientHandlerException。堆栈跟踪:

SEVERE: The registered message body readers compatible with the MIME media type are:
application/octet-stream ->
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.RenderedImageProvider
*/* ->
com.sun.jersey.core.impl.provider.entity.FormProvider
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.ReaderProvider
com.sun.jersey.core.impl.provider.entity.DocumentProvider
com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader
com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General
com.sun.jersey.core.impl.provider.entity.EntityHolderReader

com.sun.jersey.api.client.ClientHandlerException: A message body reader for Java class        com.example.Student, and Java type class com.example.Student, and MIME media type application/octet-stream was not found
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:561)
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:517)
at com.example.servlet.StudentResourceTest.test(StudentResourseTest.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
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)

我不知道如何修复这个错误。我期待您的帮助。我的代码:

@Path("/student")
@Component
public class StudentResourse {
@Autowired
private StrudentService service;

@Path("/getStudent/{id}")
@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
public Student getStudent(@PathParam("id") long id) {
    return service.get(id);
}  
}

这个类工作得很好。当我在浏览器中输入: http://127.0.0.1:8080/Application/student/getStudent/100500 它以 xml 形式向我显示学生我的测试类:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:configuration.xml")
@TestExecutionListeners({ DbUnitTestExecutionListener.class,
    DependencyInjectionTestExecutionListener.class,
    DirtiesContextTestExecutionListener.class,
    TransactionalTestExecutionListener.class })
public class StudentResourseTest extends JerseyTest {

@Override
protected AppDescriptor configure() {
    return new WebAppDescriptor.Builder("com.example.servlet")
            .contextPath("context").build();
}

@Override
protected TestContainerFactory getTestContainerFactory() {
    return new HTTPContainerFactory();
}

@Test
@DatabaseSetup("dataset.xml")
public void test() throws UnsupportedEncodingException {
        ClientConfig config = new DefaultClientConfig();
        Client client = Client.create(config);
        WebResource service = client.resource(getBaseURI());
        ClientResponse response = service.path("getStudent").path("100500")
                .accept(MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON)
                .get(ClientResponse.class);
        Student student = (Student) response.getEntity(Student.class);
        System.out.println(student);
}

@Override
public URI getBaseURI() {
    return UriBuilder.fromUri("http://127.0.0.1:8080/Application/student/")
            .build();
}

}

我正在使用此依赖项:

<dependency>
    <groupId>com.sun.jersey.jersey-test-framework</groupId>
    <artifactId>jersey-test-framework-http</artifactId>
    <version>1.2</version>
</dependency>

学生类(class)标记为@XmlRootElement。问题出在测试课上。有任何想法吗？谢谢各位的解答

Answer 1

您正在将应用程序部署到 context 上下文路径，但随后您假设(通过重写 getBaseURI() 方法)应用程序部署在 应用程序上下文路径。尝试删除覆盖的 getBaseURI() 方法并将测试方法更改为以下:

@Test
@DatabaseSetup("dataset.xml")
public void test() throws UnsupportedEncodingException {
    ClientResponse response = resource()
        .path("students").path("getStudent").path("100500")
        .accept(MediaType.APPLICATION_XML)
        .get(ClientResponse.class);

    Student student = (Student) response.getEntity(Student.class);
    System.out.println(student);
}

还要检查 HTTP 响应状态(应为 200)和响应媒体类型(在本例中应为 application/xml - 如果您请求 application/xml 并获取 application/octet-stream 显然是错误的)。