java - Jackson Json 序列化器附加内部属性

Question

我正在将 Apple Push Notification Service 的类解析为 JSON 。因此，我有一个 ApnsPayload 类，并希望在最终的 JSON 中附加额外的、可选的动态 acme 属性。这意味着我想转换以下 Jackson 输出...

{
    "aps": {
        "alert": {
            "body": "body",
            "title": "title"
        },
        "badge": 123,
        "category": "category"
    },
    "acme": {
        "1": "1",
        "value1": "value1"
    }
}

对此...

{
    "aps": {
        "alert": {
            "body": "body",
            "title": "title"
        },
        "badge": 123,
        "category": "category"
    },
    "acme-1": "1",
    "acme-value1": "value1"
}

我已成功使用 @JsonNaming() 将前缀 acme- 添加到这些键，但是我无法将这些属性移动一级。请帮忙，谢谢!

@Value
@Builder
@JsonInclude(JsonInclude.Include.NON_NULL)
// need a serializer to move up properties in Acme by one level
// @JsonSerialize(using = NewSerializer.class) 
public class ApnsPayload {

    private Aps aps;

    private Acme acme;

    @JsonNaming(AcmeNamingStrategy.class) // add prefix acme-
    public interface Acme {
    }

    @Value
    @Builder
    @JsonInclude(JsonInclude.Include.NON_NULL)
    public static class Aps {

        private Alert alert;

        private Integer badge;

        private String sound;

        @JsonProperty("content-available")
        private Integer contentAvailable;

        private String category;

        @JsonProperty("thread-id")
        private String threadId;

        @Value
        @Builder
        @JsonInclude(JsonInclude.Include.NON_NULL)
        public static class Alert {

            private String title;
            private String body;

            @JsonProperty("title-loc-key")
            private String titleLocalizationKey;

            @JsonProperty("title-loc-args")
            private List<String> titleLocalizationArgs;

            @JsonProperty("action-loc-key")
            private String actionLocalizationKey;

            @JsonProperty("loc-key")
            private String localizationKey;

            @JsonProperty("loc-args")
            private List<String> localizationArgs;

            @JsonProperty("launch-image")
            private String launchImage;
        }
    }
}

Answer 1

哈哈，我在发布这个问题后两分钟就找到了答案。我所需要的只是 Jackson Unwrapping Feature ，通过将 @JsonUnwrapped 添加到要解包的属性。

@JsonUnwrapped
private Acme acme;