java - 如何使用 jackson 将树 json 对象映射到 List<>

Question

执行查询后，结果将转换为 JSON。格式如下:

[
    {
        "version": "1.0.1",
        "device.id": 1234,
        "user.id": 1234,
        "device.platform": "IOS",
        "lastActivity": null,
        "id": 987,
        "when": "2017-08-05",
        "device.platformVersion": "1.2.2",
        "endPointArn": "arn-here-123"
    },
    {
        "version": "1.0.2",
        "device.id": 2345,
        "user.id": 9876,
        "device.platform": "IOS",
        "lastActivity": null,
        "id": 753,
        "when": "2017-08-05",
        "device.platformVersion": "1.2.2",
        "endPointArn": "arn-here-123"
    }
]

我需要为 List<> 对象映射此 json，其中:

public class DeviceUser {
  private Integer id;
  private String version;
  private Date when;
  private String endPointArn;
  private Device device;
  private User user;
}

我们可以看到带有 attrObject.fieldObject 的键(例如:“device.id”:2345)，但我看不到转换为预期格式的方法。最终的格式为:

[
    {
        "version": "1.0.1",
        "user": {
            "id": 1234
        },
        "device": {
            "id": 1234,
            "platform": "IOS",
            "platformVersion": "1.2.2"
        },
        "lastActivity": null,
        "id": 987,
        "when": "2017-08-05",
        "endPointArn": "arn-here-123"
    },
    {
        "user": {
            "id": 9876
        },
        "device": {
            "id": 2345,
            "platform": "IOS",
            "platformVersion": "1.2.2"
        },
        "version": "1.0.2",
        "lastActivity": null,
        "id": 753,
        "when": "2017-08-05",
        "endPointArn": "arn-here-123"
    }
]

Answer 1

如果您使用 Jackson，请尝试使用 JsonPropety 注释来注释字段(或 getter/setter)。

像这样:

@JsonProperty("device.id")
私有(private)设备；