如何将JSON字段映射到自定义对象属性?(复制)

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How to map JSON field names to different object field names? 1 answer
如何将JSON字段名映射到不同的对象字段名?1回答

I have a simple json message with some fields, and want to map it to a java object using spring-web.

我有一条带有一些字段的简单json消息，希望使用spring-web将其映射到java对象。

Problem: my target classes fields are named differently than int he json response. How can I anyhow map them to the object without having to rename the fields in java?

问题:我的目标类字段的命名与int he json响应不同。无论如何，如何将它们映射到对象，而不必在java中重命名字段?

Is there some annotation that could be placed here?

有什么注释可以放在这里吗?

{
  "message":"ok"
}

public class JsonEntity {
    //how to map the "message" json to this property?
    private String value;
}

RestTemplate rest = new RestTemplate();
rest.getForObject(url, JsonEntity.class);

3 个解决方案

#1

To map a JSON property to a java object with a different name use @JsonProperty annotation, and your code will be :

要将JSON属性映射到名称不同的java对象，请使用@JsonProperty注释，您的代码将是:

public class JsonEntity {
    @JsonProperty(value="message")
    private String value;
}

#2

Try this:

试试这个:

@JsonProperty("message")
private String value;

#3

In case you familiar it, you can also use Jaxb annotations to marshal/unmarshal json using Jackson

如果您熟悉它，还可以使用Jaxb注释使用Jackson对json进行编组/取消编组

@XmlRootElement
public class JsonEntity {
   @XmlElement(name = "message")
  private String value;
}

But you must initialize your Jackson context propery. Here an example how to initialize Jackson context with Jaxb annotations.

但是必须初始化Jackson上下文属性。这里有一个如何使用Jaxb注释初始化Jackson上下文的示例。

ObjectMapper mapper = new ObjectMapper();

AnnotationIntrospector introspector = new JaxbAnnotationIntrospector();
mapper.getDeserializationConfig().setAnnotationIntrospector(introspector);
mapper.getSerializationConfig().setAnnotationIntrospector(introspector);

#1