java Jackson @JsonPropertyOrder 被忽略
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Hymanson @JsonPropertyOrder is ignored
提问by Alviere
I'm currently developing RESTful app with Spark framework and I use Hymanson for serialization. And I encountered such issue: @JsonPropertyOrder is ignored.
我目前正在使用 Spark 框架开发 RESTful 应用程序，我使用 Hymanson 进行序列化。我遇到了这样的问题：@JsonPropertyOrder 被忽略。
Here's my POJO:
这是我的 POJO：
@Data
@JsonPropertyOrder({"id", "company", "title", "infos", "startDate", "endDate"})
public class Info {
@JsonProperty("id")
long id;
@JsonProperty("company")
Company company;
@JsonProperty("title")
String title;
@JsonProperty("infos")
List<Prize> infos;
@JsonProperty("startDate")
Date startDate;
@JsonProperty("endDate")
Date endDate;
public Info() {}
}
I generate JSON with this method:
我用这个方法生成JSON：
public static String generateJSONResponse(Object response) {
if (responseObjectMapper == null) {
responseObjectMapper = new ObjectMapper(new JsonFactory());
responseObjectMapper.enable(SerializationFeature.INDENT_OUTPUT);
}
try {
return responseObjectMapper.writeValueAsString(response);
} catch (IOException ioe) {
// Must not occur
}
// Something really unexpected happened, so we return unknown response;
return ErrorMessages.ERROR_RESPONSE_UNKNOWN;
}
And in the end I receive this:
最后我收到了这个：
{
"status": 0,
"result": {
"infoList": [
{
"infos": [...],
"id": 2,
"title": "...",
"company": {...},
"startDate": 1445238000000,
"endDate": 1445792400000
},
...
]
}
}
What am I doing wrong? Or something is wrong with Hymanson? Can anybody help me with that?
我究竟做错了什么？或者Hyman逊有什么问题？有人可以帮我吗？
Also, I tried this using Hymanson version 2.6.3 and 2.3.5. Both works the same way.
另外，我使用 Hymanson 版本 2.6.3 和 2.3.5 尝试了这个。两者的工作方式相同。
回答by Ashwin Jayaprakash
The annotation JavaDoc also echoes the "unordered" collection: http://fasterxml.github.io/Hymanson-annotations/javadoc/2.3.0/com/fasterxml/Hymanson/annotation/JsonPropertyOrder.html
注释 JavaDoc 也呼应了“无序”集合：http: //fasterxml.github.io/Hymanson-annotations/javadoc/2.3.0/com/fasterxml/Hymanson/annotation/JsonPropertyOrder.html
This annotation may or may not have effect on deserialization: for basic JSON handling there is no effect, but for other supported data types (or structural conventions) there may be.
此注释可能对反序列化有影响，也可能没有影响：对于基本的 JSON 处理没有影响，但对于其他支持的数据类型（或结构约定）可能有影响。
That probably explains why it is not working.
这可能解释了为什么它不起作用。
回答by Nitin Jain
Lomboks @Data interferes with Hymanson deserializing. Remove this and try..
Lomboks @Data 干扰 Hymanson 反序列化。删除这个并尝试..
