java - jackson 不承认存在的领域

Question

这是我的 JSON

{"totalSize":46,"done":true,"records":[{"Name":"Wamu I","Start_Date__c":"2016-09-26T16:56:10.000+0000","Status__c":"Completed","Type__c":"Your were expecting success, but In reality it was I, Dio!!!"}]}

这是我的两个实体类:

@JsonIgnoreProperties(ignoreUnknown = true)
public class EsidesiJobEntity {

    @JsonProperty("totalSize")
    private @Getter @Setter Integer totalSize;

    @JsonProperty("done")
    private @Getter @Setter Boolean isDone;

    @JsonProperty("records")
    private @Getter @Setter List<KarsEntity> records;

    @Override
    @JsonIgnore
    public String toString(){

        List<String> recordsObjectString = new ArrayList<String>();

        this.records.forEach((record) -> 
        {
            recordsObjectString.add(record.toString());
        });
        return "{ totalSize:"+this.totalSize+", isDone:"+this.isDone+", records:["+recordsObjectString.toString()+"]";
    }

}

@JsonIgnoreProperties(ignoreUnknown = true)
public class KarsEntity {

    @JsonProperty("Name")
    private @Getter @Setter String name;

    @JsonProperty("Start_Date__c")
    private @Getter @Setter String startDate;

    @JsonProperty("Status__c")
    private @Getter @Setter String status;

    @Override
    public String toString(){
        return "{ name:"+this.name+", startDate:"+this.startDate+", status:"+this.status+"}";
    }
}

出于某种原因，当我将该 json 字符串映射到 EsidesiJobEntity 时，出现以下错误:

Unrecognized field "totalSize"

但它肯定同时存在于 JSON 和实体中!

下面是我写的将字符串映射到实体的代码，供引用:

EsidesiEntity apexJobResponseEntity;

ObjectMapper apexMapper = new ObjectMapper();
try {
    apexJobResponseEntity = apexMapper.readValue(apexResponseString, EsidesiEntity.class);
} ...

我是否遗漏了一些非常基本的东西？

(顺便说一句，如果类/实体名称中存在一些不一致，那是因为我在将它们发布到网上之前重命名了它们。让我知道，我会在看到它们时修复它们。)

谢谢!

Answer 1

您正在使用 Lombok . Jackson 看不到您的 getter 和 setter 方法。

所以你有两个选择:

1. 不使用 Lombok 并实现 getter 和 setter 方法
2. 将 Lombok 与此附加库一起使用:jackson-lombok

如果您使用的是 maven，那么将 jackson-lombok 添加到您的 pom.xml 中:

<dependency>
    <groupId>com.xebia</groupId>
    <artifactId>jackson-lombok</artifactId>
    <version>1.1</version>
</dependency>

然后以这种方式配置您的 ObjectMapper:

ObjectMapper apexMapper = new ObjectMapper();
apexMapper.setAnnotationIntrospector(new JacksonLombokAnnotationIntrospector());
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