我使用Spring RestTemplate。我创建了一个REST服务和客户端,作为单独的应用程序进行单元测试。我有一个返回用户列表的方法和一个用于创建用户的方法:
@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON,
MediaType.TEXT_XML })
@Path("/all")
public Response getAllUsers() {
List<User> list = dao.getAll();
GenericEntity<List<User>> result = new GenericEntity<List<User>>(list) {
};
return Response.status(Status.OK).entity(result).build();
}
如果我请求在浏览器中显示所有用户,它会向我显示XML格式。这没问题。但是当我尝试使用以下代码时:
@Test
public void testGetAll() {
List list = new RestTemplate().getForObject(URL + "all", List.class);
System.out.println(list);
}
我得到了
WARNING: GET request for "http://localhost:8080/REST/all" resulted in 500 (Internal Server Error); invoking error handler
我试图调试这个程序。方法在运行时没有抛出异常。浏览器显示用户xml信息。 可能出了什么问题?
另外,我想知道如何从模板对象中获取状态码或消息(用于测试)?
感谢您的回答。
编辑:
我修改了我的测试方法:
@Test
public void testGetAll() {
RestTemplate template = new RestTemplate();
List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
Jaxb2RootElementHttpMessageConverter jaxbMessageConverter = new Jaxb2RootElementHttpMessageConverter();
List<MediaType> mediaTypes = new ArrayList<MediaType>();
mediaTypes.add(MediaType.APPLICATION_XML);
jaxbMessageConverter.setSupportedMediaTypes(mediaTypes);
messageConverters.add(jaxbMessageConverter);
template.setMessageConverters(messageConverters);
List list = template.getForObject(URL + "all",
ArrayList.class);
System.out.println(list);
}
我遇到了一个异常错误:
org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class java.util.ArrayList] and content type [application/xml]
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:107)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:496)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:452)
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:222)
at com.nixsolutions.web.service.rest.UserRESTServiceTest.testGetAll(UserRESTServiceTest.java:61)
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.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
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.junit.runners.ParentRunner.run(ParentRunner.java:309)
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)
ArrayList
替换为List
,是否会有与以前相同的行为?另外一件事——也许您需要对集合进行根元素包装。例如:某些类将集合作为字段,并使用 JaxB 注解正确映射该类。 - Admit