Question

我在Java中使用Jackson从REST端点返回JSON响应。这是生成的示例响应：

{"StatusCode":{"@statusCode":"OK"},"SomeElements":null}

问题：

杰克逊为什么要加入@ in？
如何阻止它添加？

注意：这个问题与this不同，我想知道杰克逊为什么要添加它，以及如何阻止它这样做，因为它可能会导致系统出现问题将回复传递给。

修改

以下是已清理的代码：

public enum StatusCodeType {
    OK, WARNING, ERROR
}

@XmlType(name = "StatusResponse", namespace = "http://www.w3.org/2001/XMLSchema/<obfuscated>", propOrder = {"statusCode", "message"})
@XmlAccessorType(XmlAccessType.FIELD)
public class StatusResponse {
    @XmlAttribute(name = "statusCode", required = true)
    private StatusCodeType statusCode;
    @XmlAttribute(name = "message")
    private String message;

    public StatusResponse(final StatusCodeType statusCode, final String message) {
        this.statusCode = statusCode;
        this.message = message;
    }

    public StatusResponse(final StatusCodeType statusCode) {
        this.statusCode = statusCode;
    }

    public StatusResponse() {
    }

    public StatusCodeType getStatusCode() {
        return statusCode;
    }

    public void setStatusCode(StatusCodeType statusCode) {
        this.statusCode = statusCode;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

@XmlAccessorType(XmlAccessType.FIELD)
public abstract class SomeResponse {

    @XmlElement(name = "StatusCode", required = true)
    private StatusResponse statusResponse;

    public StatusResponse getStatusResponse() {
        return statusResponse;
    }

    public void setStatusResponse(StatusResponse statusResponse) {
        this.statusResponse = statusResponse;
    }
}

@XmlRootElement(name = "XmlResponse", namespace = "http://www.w3.org/2001/XMLSchema/<obfuscated>")
public class XmlResponse extends SomeResponse {

    @XmlElement(name = "SomeElement")
    @XmlElementWrapper(name = "SomeElements", required = true)
    private List<SomeElement> someElements;

    public List<SomeElement> getSomeElements() {
        return someElements;
    }

    public void setSomeElements(List<SomeElement> someElements) {
        this.someElements = someElements;
    }
}

@Path("/getAll")
@GET
@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public Response getAll(@QueryParam("firstParam") String firstParam, @QueryParam("secondParam") String secondParam) {
    ...

    final XmlResponse resp = processToXmlResponse(someObject);
    return Response.ok().entity(resp).build();
}

Answer 1

你的类路径上可能有jettison，它的提供者用于序列化而不是杰克逊。

默认情况下，Jettison会使用'@'为映射到属性的属性添加前缀。

请参阅https://github.com/FasterXML/jackson-core/issues/114。

杰克逊为什么在某些JSON属性中添加@以及如何防止它？

1 个答案: