问JAX-RS JAXB Jackson不使用@XmlRootElement名称

EN

@XmlRootElement(name = "user")
@XmlAccessorType(XmlAccessType.FIELD)
public class UserDTO implements Serializable
{
    private static final long serialVersionUID = 1L;

    private Long id;
    private String username;
    private String firstname;
    private String lastname;

    // getter & setter
}

@POST
@Path("users/{id}")
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public UserAccountDTO login(@PathParam("id") Long id)
{
    UserAccountDTO userAccount = loadUserAccount(id);
    return userAccount;
}

@Provider
@Produces(MediaType.APPLICATION_JSON)
public class SkedFlexContextResolver implements ContextResolver<ObjectMapper>
{
    private ObjectMapper objectMapper;

    public SkedFlexContextResolver() throws Exception
    {
        this.objectMapper = new ObjectMapper().configure(SerializationFeature.WRAP_ROOT_VALUE, true);
    }

    @Override
    public ObjectMapper getContext(Class<?> objectType)
    {
        return objectMapper;
    }
}

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<user>
  <id>10</id>
  <username>Admin</username>
  <firstname>Administrator</firstname>
</user>

{
    "UserAccountDTO":
    {
        "id": 10,
        "username": "Admin",
        "firstname": "Administrator",
        "lastname": null
    }
}