Java Jackson反序列化实现接口(interface)的抽象类子类

Question

我有一个界面:

@JsonTypeInfo(
        use = JsonTypeInfo.Id.NAME,
        property = "type")
@JsonSubTypes({
        @JsonSubTypes.Type(value = ChildA.class, name = "childA"),
        @JsonSubTypes.Type(value = ChildB.class, name = "childB"),
})
public interface Event {
}

然后是实现这个接口(interface)的抽象类:

public abstract class SpecificEvent implements Event {
    private ZonedDateTime timestamp;
}

最后是抽象类的 child :

public class ChildA extends SpecificEvent {
}

public class ChildB extends SpecificEvent {
}

Jackson 无法反序列化子项并出现错误:

Could not resolve type id 'childA' as a subtype ofpackages.SpecificEvent.

我做错了什么？

UPD

我正在消费 children throw RabbitMQ 的消息。兔子配置:

   public ObjectMapper objectMapper() {
        var mapper = new ObjectMapper();
        mapper.registerModule(new JavaTimeModule());
        mapper.registerModule(new Jdk8Module());
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, true);
        mapper.setDateFormat(StdDateFormat.instance
                .withTimeZone(TimeZone.getTimeZone(ZoneId.of("Europe/Moscow")))
                .withLocale(new Locale("ru"))
        );
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        return mapper;
    }

    public MessageConverter jsonMessageConverter() {
        return new Jackson2JsonMessageConverter(objectMapper());
    }

我只使用 RabbitTemplate 来发送事件:

    rabbitTemplate.convertAndSend(
            exchange.getName(),
            event.getEventRouteKey().getKey(),
            event
    );

并通过@RabbitListener 收听。

Answer 1

实际上，我忘记在更改模型之前清除 Rabbit 中的队列，这就是我出现反序列化错误的原因。