使用JAXBElement在JAXBElement下使用MOXy处理JSON的问题

Question

我扩展了moxy代码以使用XML模式定义，而不是JAXB注释bean。xjc编译的XML模式生成与原始示例相同的XML和JSON编码。

我按照jersey的说明，使用ObjectFactory在CustomerResource中生成JAXBElement客户对象表示。JAVA我还按照描述修改了客户机。我还将Jersey 2.2下的JAXB与MOXy结合在一起，解决了PUT问题中描述的JSON处理问题

媒体类型。应用程序XML功能完美，并且是MediaType。应用程序_JSON适用于GETs，但客户端无法将JSON打包到带有“MessageBodyWriter not found”的PUT上。将引发以下异常：

testJsonCustomer(org.glassfish.jersey.examples.jaxbmoxy.MoxyAppTest)  Time elapsed: 0.113 sec  <<< ERROR!
org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=application/json, type=class javax.xml.bind.JAXBElement, genericType=class javax.xml.bind.JAXBElement.
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:191)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139)
at org.glassfish.jersey.filter.LoggingFilter.aroundWriteTo(LoggingFilter.java:268)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139)
at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1005)
at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:430)
at org.glassfish.jersey.client.HttpUrlConnector._apply(HttpUrlConnector.java:290)

下面是我如何修改CustomerResource的。爪哇：

private static ObjectFactory factory = new ObjectFactory();

@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
public JAXBElement<Customer> getCustomer() {
    return factory.createCustomer(customer);
}

@PUT
@Consumes({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
public JAXBElement<Customer> setCustomer(Customer c) {
    customer = c;      
    return factory.createCustomer(customer);
}

下面是我如何发出PUT请求（与功能XML相同）：

@Override
protected void configureClient(ClientConfig clientConfig) {
    clientConfig.register(new MoxyXmlFeature());
}

@Test
public void testJsonCustomer() throws Exception {
    ObjectFactory factory = new ObjectFactory();
    final WebTarget webTarget = target().path("customer");

    // Target customer entity with GET and verify inital customer name.
    Customer customer = webTarget.request(MediaType.APPLICATION_JSON).get(Customer.class);
    assertEquals("Tom Dooley", customer.getPersonalInfo().getName());

    // Update customer name with PUT and verify operation successful.
    customer.getPersonalInfo().setName("Bobby Boogie");
    Response response = webTarget.request(MediaType.APPLICATION_JSON).put(Entity.json(factory.createCustomer(customer)));
    assertEquals(200, response.getStatus());

    // Target customer entity with GET and verify name updated.
    Customer updatedCustomer = webTarget.request(MediaType.APPLICATION_JSON).get(Customer.class);
    assertEquals(customer.getPersonalInfo().getName(), updatedCustomer.getPersonalInfo().getName());
}

谢谢你的帮助！

Answer 1

你面临的问题在这一行：

Response response = webTarget.request(MediaType.APPLICATION_JSON).put(Entity.json(factory.createCustomer(customer)));

基本上，您将JAXBElement传递给Entity#json方法，但是运行时没有关于泛型类型的信息，您需要提供它。这就是一般实体

webTarget
    .request(MediaType.APPLICATION_JSON)
    .put(Entity.json(new GenericEntity<JAXBElement<Customer>>(factory.createCustomer(customer)) {}));