json - Jersey 调用带有对象作为参数的 get 不起作用

Question

我是 Jersey 的新手，我正在尝试为搜索结果开发一个 GET。为此，我需要发送一个包含搜索条件和数据的对象。我想知道我做错了什么。我的 Junit 测试用例出现以下异常

com.sun.jersey.api.client.UniformInterfaceException: GET http://localhost:8081/mCruiseOnCarPool4All/carpool4all/Search/Request/com.mcruiseon.carpool.concrete.SearchConcrete@676e3f returned a response status of 404 Not Found
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:686)
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:507)
at test.carpool4all.SingleSearchTest.testPost(SingleSearchTest.java:89)

我的服务器端 GET

    @GET
    @Path ("Request/{search}")
    @Consumes({ MediaType.APPLICATION_JSON })
    @Produces({ MediaType.APPLICATION_JSON })
    public Response search(@PathParam("search") SearchConcrete searchConcrete) {
        SearchJourneyRequest request = new SearchJourneyRequest(searchConcrete) ;
        SearchJourneyResponse response ;
        clientSession = sessionManager.getClientSession(searchConcrete.getIdentityHash()) ;
        clientSession.getSendQueue().sendRequest(request) ;
        try {
            response = (SearchJourneyResponse)clientSession.waitAndGetResponse(request) ;
        } catch (WaitedLongEnoughException e) {
            return Response.serverError().build() ;
        } catch (UnableToResolveResponseException e) {
            return Response.serverError().build() ;
        }
        return Response.ok(response.getSearchResults()).build();
    }

客户端Junit测试

SearchConcrete searchProvider = new SearchConcrete(Globals.SearchCriteria.FlexiTime,
    identityHash,
    // more parameters
    );
    service = client.resource(UriBuilder.fromUri("http://localhost:8081/mCruiseOnCarPool4All/carpool4all/Search/Request/"+searchProvider).build());
    Object[] searchResults = service.type(MediaType.APPLICATION_JSON).get(Object[].class);

编辑:感谢@eugen，为了解决这个问题，我添加了一个具体类，并将我的 Object[] 作为私有(private)成员。我在这里使用 POST 而不是 GET，这是固定代码。现在我的拼车搜索结果来了:)。

service = client.resource(UriBuilder.fromUri(

"http://localhost:8081/mCruiseOnCarPool4All/carpool4all/Search/Request").build());
            SearchResultsConcrete searchResults = service.type(MediaType.APPLICATION_JSON).post(SearchResultsConcrete.class, searchProvider);
            assertNotNull(searchResults);
            assertNotNull(searchResults.getSearchResults()) ;
            assertTrue(searchResults.getSearchResults().length == 3) ;
            assertTrue(searchResults.getSearchResults()[SearchJourneyResponse.FLEXI_POSITION].length > 0) ;
            assertTrue(searchResults.getSearchResults()[SearchJourneyResponse.FLEXIENDTIME_POSITION].length > 0) ;


@POST
    @Path ("Request")
    @Consumes({ MediaType.APPLICATION_JSON })
    @Produces({ MediaType.APPLICATION_JSON })
    public Response search(JAXBElement<SearchConcrete> element) {
        SearchJourneyRequest request = new SearchJourneyRequest((SearchConcrete)element.getValue()) ;
        SearchJourneyResponse response ;
        clientSession = sessionManager.getClientSession(((SearchConcrete)element.getValue()).getIdentityHash()) ;
        clientSession.getSendQueue().sendRequest(request) ;
        try {
            response = (SearchJourneyResponse)clientSession.waitAndGetResponse(request) ;
        } catch (WaitedLongEnoughException e) {
            return Response.serverError().build() ;
        } catch (UnableToResolveResponseException e) {
            return Response.serverError().build() ;
        }
        return Response.ok(response.getSearchResults()).build();
    }

Answer 1

你做错了。首先让我们分析你的错误:

com.sun.jersey.api.client.UniformInterfaceException: GET http://localhost:8081/mCruiseOnCarPool4All/carpool4all/Search/Request/com.mcruiseon.carpool.concrete.SearchConcrete@676e3f returned a response status of 404 Not Found.

我们可以看到 com.mcruiseon.carpool.concrete.SearchConcrete@676e3f 附加在您请求的 url 末尾(由您的测试用例“http://localhost:8081/mCruiseOnCarPool4All/carpool4all/Search/Request/”+searchProvider 确认)。这没有意义。

我假设您想通过 GET 请求发送一个 json？你不能那样做! GET 没有正文，只有 url(和 header )，并且将 json 附加到您的 url 没有意义。如果你想发送 json，你必须做一个 POST。

您正在尝试做与这篇文章类似的事情 What is the maximum length of JSON object received by JAX-RS web service using GET? ，看看我的回答。

这里是如何用 Genson 库做你想做的事 http://code.google.com/p/genson/ .使用 maven 下载 genson，它会在你的类路径中自动启用 json 支持并处理所有数据绑定(bind)。然后更改您的服务器端方法:

@POST
@Consumes({ MediaType.APPLICATION_JSON })
@Produces({ MediaType.APPLICATION_JSON })
public Response search(SearchConcrete searchConcrete) {
    ...
}

将您的测试更改为:

// configure your client to use genson
ClientConfig config = new DefaultClientConfig();
config.getClasses().add(GensonJsonConverter.class);
cli = Client.create(config);

// then the test code
TypeOfTheResponse response = cli.resource("http://localhost:8081/mCruiseOnCarPool4All/carpool4all/Search/Request")
   .accept(MediaType.APPLICATION_JSON)
   .type(MediaType.APPLICATION_JSON)
   .post(TypeOfTheResponse.class, searchProvider);

备注:不要使用 Object[] 作为响应，使用具体的 java 类，如 MyResponseItem[]