Java 如何在Jersey中从JSON请求中排除空字段？

我试图做的是在我的请求中避免空字段。我用这件球衣

    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-client</artifactId>
        <version>2.5</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-json</artifactId>
        <version>1.18</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey.contribs</groupId>
        <artifactId>jersey-multipart</artifactId>
        <version>1.17</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
        <version>2.5.1</version>
    </dependency>

这就是我想要传达的

{
    "locale": "en_US",
    "file": {
        "file": {
            "version": null,
            "permissionMask": null,
            "creationDate": null,
            "updateDate": null,
            "label": "my.properties",
            "description": null,
            "uri": null,
            "type": "prop",
            "content": null
        }
    }
}

但我需要

   {
        "locale": "en_US",
        "file": {
            "file": {
                "label": "my.properties",
                "type": "prop",
            }
        }
    }

---

如何从请求中排除所有空字段？

我相信jersey正在使用jackson进行序列化。要从序列化json中排除空字段，请尝试使用

@JsonInclude（Include.NON_null）

注释目标类。正如在文章中解释的那样

如果无法更改实体，则必须配置自定义ObjectMapper：

@Provider
public class MyObjectMapperProvider implements ContextResolver<ObjectMapper> {

    final ObjectMapper mapper;

    public MyObjectMapperProvider() {
        mapper = new ObjectMapper();
        mapper.setSerializationInclusion(Include.NON_NULL);
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return mapper
    }
}

---

它已被描述

，但我无法更改实体。所有设置必须在Jersey端执行。然后您需要通过

mapper.setSerializationInclusion（Include.NON_NULL）直接配置ObjectMapper。以下是如何为jersey执行此操作的说明：。您需要编写自定义ContextResolver，它将提供经过微调的ObjectMapper。然后从示例中将其注册到客户端实例首先，不要混合版本！
@Provider
public class MyObjectMapperProvider implements ContextResolver<ObjectMapper> {

    final ObjectMapper mapper;

    public MyObjectMapperProvider() {
        mapper = new ObjectMapper();
        mapper.setSerializationInclusion(Include.NON_NULL);
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return mapper
    }
}

Client client = ClientBuilder
    .newClient()
    .register(MyObjectMapperProvider.class)
    .register(JacksonFeature.class);