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我已经被这个问题困扰了好几天,现在正在寻找一些指导来帮助解决这个问题。我在 Metro 下使用 jax-ws 有相当多的经验,但这是我第一次使用 Jersey 进入 jax-rs。为了简化移动部分,我以 jersey-examples-moxy 代码为起点。

我修改了示例项目以同时接受 XML 和 JSON。我认为这很简单,但我似乎错过了一些东西,因为这是一次痛苦的经历。当我请求“application/xml”时,代码运行没有问题,GET 将适用于“application/json”,但是当我尝试使用 JSON 进行 PUT 时,服务器返回 500 状态代码。我可以看到在 PUT 请求中发送了 JSON,但服务器似乎在接受 JSON 时遇到了问题。

这是修改后的 CustomerResource.java 文件段。我所做的只是将 MediaType.APPLICATION_JSON 参数添加到 Produces 和 Consumes 注释中。

@Path("/customer")
public class CustomerResource {

  private static Customer customer = createInitialCustomer();

  @GET
  @Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
  public Customer getCustomer() {
    return customer;
  }

  @PUT
  @Consumes({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
  public void setCustomer(Customer c) {
    customer = c;
  }

  private static Customer createInitialCustomer() {
    Customer result = new Customer();

    result.setName("Jane Doe");
    result.setAddress(new Address("123 Any Street", "My Town"));
    result.getPhoneNumbers().add(new PhoneNumber("work", "613-555-1111"));
    result.getPhoneNumbers().add(new PhoneNumber("cell", "613-555-2222"));

    return result;
  }
}

我修改了 MoxyAppTest.java 文件以在单独的测试中请求 XML 和 JSON MediaTypes:

@Test
public void testJaxBCustomer() throws Exception {
    final WebTarget webTarget = target().path("customer");

    Customer customer = webTarget.request(MediaType.APPLICATION_XML).get(Customer.class);
    assertEquals("Jane Doe", customer.getName());

    customer.setName("Tom Dooley");
    Response response = webTarget.request(MediaType.APPLICATION_XML).put(Entity.xml(customer));
    assertEquals(204, response.getStatus());

    Customer updatedCustomer = webTarget.request(MediaType.APPLICATION_XML).get(Customer.class);
    assertEquals(customer, updatedCustomer);
}

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

    Customer customer = webTarget.request(MediaType.APPLICATION_JSON).get(Customer.class);
    assertEquals("Tom Dooley", customer.getName());

    customer.setName("Bobby Boogie");
    Response response = webTarget.request(MediaType.APPLICATION_JSON).put(Entity.json(customer));
    assertEquals(204, response.getStatus());

    Customer updatedCustomer = webTarget.request(MediaType.APPLICATION_JSON).get(Customer.class);
    assertEquals(customer, updatedCustomer);
}

在 App.java 文件中,我在 createApp() 方法中添加了 JsonMoxyConfigurationContextResolver 类和 registerInstances() 调用。(注意去掉这个不会改变结果)。

public static ResourceConfig createApp() {
    return new ResourceConfig().packages("org.glassfish.jersey.examples.xmlmoxy")
            .register(new MoxyXmlFeature())
            .registerInstances(new JsonMoxyConfigurationContextResolver());      
}

@Provider
final static class JsonMoxyConfigurationContextResolver implements ContextResolver<MoxyJsonConfig> {

    @Override
    public MoxyJsonConfig getContext(Class<?> objectType) {
        final MoxyJsonConfig configuration = new MoxyJsonConfig();

        Map<String, String> namespacePrefixMapper = new HashMap<String, String>(1);
        namespacePrefixMapper.put("http://www.w3.org/2001/XMLSchema-instance", "xsi");

        configuration.setNamespacePrefixMapper(namespacePrefixMapper);
        configuration.setNamespaceSeparator(':');

        return configuration;
    }
}

以下是显示“application/xml”PUT 成功且状态为 204 的日志段:

Aug 23, 2013 1:23:50 AM org.glassfish.jersey.filter.LoggingFilter log
INFO: 3 * LoggingFilter - Request received on thread main
3 > PUT http://localhost:9998/customer
3 > Accept: application/xml
3 > Content-Type: application/xml
<?xml version="1.0" encoding="UTF-8"?>
<customer><personal-info><name>Tom Dooley</name></personal-info><contact-info><address><city>My Town</city><street>123 Any Street</street></address><phone-number type="work">613-555-1111</phone-number><phone-number type="cell">613-555-2222</phone-number></contact-info></customer>

Aug 23, 2013 1:23:50 AM org.glassfish.jersey.filter.LoggingFilter log
INFO: 4 * LoggingFilter - Response received on thread main
4 < 204
4 < Date: Fri, 23 Aug 2013 05:23:50 GMT

现在对于“应用程序/json”日志:

Aug 23, 2013 1:23:51 AM org.glassfish.jersey.filter.LoggingFilter log
INFO: 3 * LoggingFilter - Request received on thread main
3 > PUT http://localhost:9998/customer
3 > Accept: application/json
3 > Content-Type: application/json
{"personal-info":{"name":"Bobby Boogie"},"contact-info":{"address":{"city":"My Town","street":"123 Any Street"},"phone-number":[{"type":"work","value":"613-555-1111"},{"type":"cell","value":"613-555-2222"}]}}

Aug 23, 2013 1:23:51 AM org.glassfish.jersey.filter.LoggingFilter log
INFO: 4 * LoggingFilter - Response received on thread main
4 < 500
4 < Date: Fri, 23 Aug 2013 05:23:50 GMT
4 < Content-Length: 0
4 < Connection: close

如您所见,服务器正在返回状态代码 500。Grizzly 测试容器没有生成捕获任何异常信息的日志,并且在 500 响应中似乎没有返回任何内容。有没有办法获得额外的异常细节?

关于如何进行的任何建议?

谢谢!

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1 回答 1

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实际上导致此问题的原因是:

  • @XmlPathCustomerbean上的注释,以及
  • namespacePrefixMapper你正在设置的MoxyJsonConfig

这会导致NullPointerException(取消)编组 JSON 期间。这已在MOXy的夜间版本 (2.5.1和) 中得到修复。2.6.1您可以从Nightly Builds页面下载它。

如果您暂时不想更改 MOXy 的版本,只需删除此行

configuration.setNamespacePrefixMapper(namespacePrefixMapper);

JsonMoxyConfigurationContextResolver,你应该没事。

关于日志记录问题 - 我们知道它并且它已经修复(应该在 中解决Jersey 2.3)。

于 2013-08-23T08:51:07.673 回答