泽西问题与解组响应实体与HashSet字段

Question

我有Jersey的问题（2.13）。 我想这个问题与非编组机制有关。 我的User实体有一个字段 - Role实体的集合。 当我试图得到它时，我得到一个错误。

这是我的课程

@XmlRootElement(name = "user")
public class User {

    private Set<Role> roleSet;

    // other fields omitted

    @XmlElementWrapper(name = "roles")
    @XmlElement(name = "role")
    public Set<Role> getRoleSet() { /* compiled code */ }

    // all other getters with simple JAXB annotations @XmlElement omitted    
}

角色

@XmlRootElement(name = "role")
public class ClientRole {
    private String name;
    private boolean active;
    private String id;

    @XmlElement(name = "name")
    public String getName() { /* compiled code */ }

    // all getters with JAXB annotations omitted

}

我的泽西岛客户代码

HttpAuthenticationFeature authenticationFeature = HttpAuthenticationFeature.basic("freddy", "qwerty");    
        Client client = ClientBuilder
                .newClient()
                .register(authenticationFeature)
                .register(JacksonFeature.class);   

        WebTarget target = client.target("http://localhost:4444/server/");    

        Response resp = target
                .path("/api/users/freddy")
                .request()
                .accept(MediaType.APPLICATION_JSON)
                .get();   

        User entity = resp.readEntity(User.class);
        System.out.println(entity);

我该如何解决这个错误？ 或者也许我只是忘记注册一些新功能（对于新泽西版本2.13）？

Exception in thread "main" javax.ws.rs.ProcessingException: Error reading entity from input stream.
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:866)
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:783)
    at org.glassfish.jersey.client.ClientResponse.readEntity(ClientResponse.java:326)
    at org.glassfish.jersey.client.InboundJaxrsResponse$1.call(InboundJaxrsResponse.java:111)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:228)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:399)
    at org.glassfish.jersey.client.InboundJaxrsResponse.readEntity(InboundJaxrsResponse.java:108)
    at com.test.CreateUserExample.main(CreateUserExample.java:36)
Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "roles" (class com.server.dto.auth.User), not marked as ignorable (6 known properties: "enabled", "statusId", "role", "username", "emailAddress", "password"])
 at [Source: org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream@34cdeda2; line: 1, column: 141] (through reference chain: com.server.dto.auth.User["roles"])
    at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:51)
    at com.fasterxml.jackson.databind.DeserializationContext.reportUnknownProperty(DeserializationContext.java:671)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:771)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1297)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownVanilla(BeanDeserializerBase.java:1275)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:247)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:118)
    at com.fasterxml.jackson.databind.ObjectReader._bind(ObjectReader.java:1233)
    at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:677)
    at com.fasterxml.jackson.jaxrs.base.ProviderBase.readFrom(ProviderBase.java:777)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.invokeReadFrom(ReaderInterceptorExecutor.java:264)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:234)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:154)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:1124)
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:851)

UPDATE

这是我的依赖

<dependency>
    <groupId>org.glassfish.jersey.core</groupId>
    <artifactId>jersey-client</artifactId>
    <version>2.13</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>2.13</version>
</dependency>

更新2

String entity = resp.readEntity(String.class);

{"name":"Bob","enabled":true,"roles":[{"name":"ADMIN","active":false,"id":12313214},{"name":"USER","active":true,"id":45353}]}

Answer 1

问题是，在序列化时，你可能正在使用MOXy，它增加了额外的包装元素（在这种情况下的roles ），而杰克逊并不完全支持。

您可以在客户端使用MOXy进行反序列化

Client client = ClientBuilder
            .newClient()
            .register(authenticationFeature)
            .register(MoxyJsonFeature.class);

或稍微更改您的模型类，以便JAXB序列化程序（MOXy）生成Jackson能够反序列化的内容

@XmlElement(name = "roles")
public Set<Role> getRoleSet() {
    return roleSet;
}

最后，你可以通过注册JacksonFeature让Jersey在服务器端使用Jackson：

@ApplicationPath("/")
public class TestApplication extends ResourceConfig {

    public TestApplication() {
        register(TestResource.class);
        register(JacksonFeature.class);
    }
}