gson 将JSON转换为java对象和java对象列表

vatpfxk5  于 2022-11-06  发布在  Java
关注(0)|答案(1)|浏览(187)

我从一个API得到这个JSONObject响应

{
  "meta": {
    "code": 200
  },
  "data": {
    "tracking": {
      "id": "lk46hwgbadfqcl2fyacyw00q",
      "created_at": "2022-04-26T09:33:13+00:00",
      "updated_at": "2022-04-26T09:33:14+00:00",
      "last_updated_at": "2022-04-26T09:33:14+00:00",
      "tracking_number": "1Z965EW40228937186",
      "slug": "ups",
      "active": false,
      "android": [],
      "custom_fields": null,
      "customer_name": null,
      "delivery_time": 20,
      "destination_country_iso3": "USA",
      "courier_destination_country_iso3": "USA",
      "emails": [],
      "expected_delivery": null,
      "ios": [],
      "note": null,
      "order_id": null,
      "order_id_path": null,
      "order_date": null,
      "origin_country_iso3": "USA",
      "shipment_package_count": null,
      "shipment_pickup_date": "2022-03-28T19:45:12-07:00",
      "shipment_delivery_date": "2022-04-16T16:04:15",
      "shipment_type": "UPS 2nd Day Air®",
      "shipment_weight": 15.8,
      "shipment_weight_unit": "lb",
      "signed_by": "DRIVER RELEASE",
      "smses": [],
      "source": "api",
      "tag": "Delivered",
      "subtag": "Delivered_001",
      "subtag_message": "Delivered",
      "title": "dd",
      "tracked_count": 1,
      "last_mile_tracking_supported": true,
      "language": null,
      "unique_token": "deprecated",
      "checkpoints": [
        {
          "slug": "ups",
          "city": null,
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "US, United States",
          "country_name": "USA",
          "message": "Shipper created a label, UPS has not received the package yet.",
          "country_iso3": "USA",
          "tag": "InfoReceived",
          "subtag": "InfoReceived_001",
          "subtag_message": "Info Received",
          "checkpoint_time": "2022-03-28T15:55:14-07:00",
          "coordinates": [],
          "state": null,
          "zip": null,
          "raw_tag": "MP"
        },
        {
          "slug": "ups",
          "city": "Goodyear",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Goodyear, AZ, US, United States",
          "country_name": "USA",
          "message": "Origin Scan",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_002",
          "subtag_message": "Acceptance scan",
          "checkpoint_time": "2022-03-28T19:45:12-07:00",
          "coordinates": [],
          "state": "AZ",
          "zip": null,
          "raw_tag": "OR"
        },
        {
          "slug": "ups",
          "city": "Goodyear",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Goodyear, AZ, US, United States",
          "country_name": "USA",
          "message": "Departed from Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_007",
          "subtag_message": "Departure Scan",
          "checkpoint_time": "2022-03-29T00:38:00-07:00",
          "coordinates": [],
          "state": "AZ",
          "zip": null,
          "raw_tag": "DP"
        },
        {
          "slug": "ups",
          "city": "Phoenix",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Phoenix, AZ, US, United States",
          "country_name": "USA",
          "message": "Arrived at Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_003",
          "subtag_message": "Arrival scan",
          "checkpoint_time": "2022-03-29T01:18:00-07:00",
          "coordinates": [],
          "state": "AZ",
          "zip": null,
          "raw_tag": "AR"
        },
        {
          "slug": "ups",
          "city": "Phoenix",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Phoenix, AZ, US, United States",
          "country_name": "USA",
          "message": "Departed from Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_007",
          "subtag_message": "Departure Scan",
          "checkpoint_time": "2022-03-29T05:43:00-07:00",
          "coordinates": [],
          "state": "AZ",
          "zip": null,
          "raw_tag": "DP"
        },
        {
          "slug": "ups",
          "city": "Philadelphia",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Philadelphia, PA, US, United States",
          "country_name": "USA",
          "message": "Arrived at Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_003",
          "subtag_message": "Arrival scan",
          "checkpoint_time": "2022-03-29T12:54:00-04:00",
          "coordinates": [],
          "state": "PA",
          "zip": null,
          "raw_tag": "AR"
        },
        {
          "slug": "ups",
          "city": "Philadelphia",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Philadelphia, PA, US, United States",
          "country_name": "USA",
          "message": "Departed from Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_007",
          "subtag_message": "Departure Scan",
          "checkpoint_time": "2022-03-30T01:17:00-04:00",
          "coordinates": [],
          "state": "PA",
          "zip": null,
          "raw_tag": "DP"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Arrived at Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_003",
          "subtag_message": "Arrival scan",
          "checkpoint_time": "2022-03-30T04:03:00-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "AR"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Processing at UPS Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_001",
          "subtag_message": "In Transit",
          "checkpoint_time": "2022-03-30T06:20:05-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "YP"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Out For Delivery Today",
          "country_iso3": "USA",
          "tag": "OutForDelivery",
          "subtag": "OutForDelivery_001",
          "subtag_message": "Out for Delivery",
          "checkpoint_time": "2022-03-30T09:13:00-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "OT"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "The receiver was not available for delivery. We'll make a second attempt the next business day.",
          "country_iso3": "USA",
          "tag": "AttemptFail",
          "subtag": "AttemptFail_002",
          "subtag_message": "Addreesee not available",
          "checkpoint_time": "2022-03-30T19:55:20-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "48"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Out For Delivery Today",
          "country_iso3": "USA",
          "tag": "OutForDelivery",
          "subtag": "OutForDelivery_001",
          "subtag_message": "Out for Delivery",
          "checkpoint_time": "2022-03-31T09:03:56-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "OT"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "The receiver was not available for delivery. We'll make a second attempt the next business day.",
          "country_iso3": "USA",
          "tag": "AttemptFail",
          "subtag": "AttemptFail_002",
          "subtag_message": "Addreesee not available",
          "checkpoint_time": "2022-03-31T20:17:04-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "48"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Out For Delivery Today",
          "country_iso3": "USA",
          "tag": "OutForDelivery",
          "subtag": "OutForDelivery_001",
          "subtag_message": "Out for Delivery",
          "checkpoint_time": "2022-04-01T09:33:30-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "OT"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "The receiver was not available for delivery. We'll make a second attempt the next business day.",
          "country_iso3": "USA",
          "tag": "AttemptFail",
          "subtag": "AttemptFail_002",
          "subtag_message": "Addreesee not available",
          "checkpoint_time": "2022-04-01T18:17:11-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "48"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Processing at UPS Facility",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_001",
          "subtag_message": "In Transit",
          "checkpoint_time": "2022-04-02T03:34:21-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "YP"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Loaded on Delivery Vehicle",
          "country_iso3": "USA",
          "tag": "OutForDelivery",
          "subtag": "OutForDelivery_001",
          "subtag_message": "Out for Delivery",
          "checkpoint_time": "2022-04-02T03:49:53-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "OF"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Out For Delivery Today",
          "country_iso3": "USA",
          "tag": "OutForDelivery",
          "subtag": "OutForDelivery_001",
          "subtag_message": "Out for Delivery",
          "checkpoint_time": "2022-04-02T09:49:40-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "OT"
        },
        {
          "slug": "ups",
          "city": "Landover",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Landover, MD, US, United States",
          "country_name": "USA",
          "message": "Package was driver released",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_001",
          "subtag_message": "In Transit",
          "checkpoint_time": "2022-04-02T17:00:44-04:00",
          "coordinates": [],
          "state": "MD",
          "zip": null,
          "raw_tag": "FS"
        },
        {
          "slug": "ups",
          "city": "Bronx",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Bronx, NY, US, United States",
          "country_name": "USA",
          "message": "The receiver refused, the package appeared to be damaged. UPS will notify the sender with the details.",
          "country_iso3": "USA",
          "tag": "Exception",
          "subtag": "Exception_003",
          "subtag_message": "Customer refused delivery",
          "checkpoint_time": "2022-04-14T15:08:16-04:00",
          "coordinates": [],
          "state": "NY",
          "zip": null,
          "raw_tag": "KQ"
        },
        {
          "slug": "ups",
          "city": "Great Falls",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "Great Falls, MT, US, United States",
          "country_name": "USA",
          "message": "Package was driver released",
          "country_iso3": "USA",
          "tag": "InTransit",
          "subtag": "InTransit_001",
          "subtag_message": "In Transit",
          "checkpoint_time": "2022-04-15T16:04:15-06:00",
          "coordinates": [],
          "state": "MT",
          "zip": null,
          "raw_tag": "FS"
        },
        {
          "slug": "ups",
          "city": "GOODYEAR",
          "created_at": "2022-04-26T09:33:14+00:00",
          "location": "GOODYEAR, AZ, US, United States",
          "country_name": "USA",
          "message": "DELIVERED",
          "country_iso3": "USA",
          "tag": "Delivered",
          "subtag": "Delivered_001",
          "subtag_message": "Delivered",
          "checkpoint_time": "2022-04-16T16:04:15-06:00",
          "coordinates": [],
          "state": "AZ",
          "zip": null,
          "raw_tag": "FS"
        }
      ],
      "subscribed_smses": [],
      "subscribed_emails": [],
      "return_to_sender": false,
      "order_promised_delivery_date": null,
      "delivery_type": null,
      "pickup_location": null,
      "pickup_note": null,
      "courier_tracking_link": "https://www.ups.com/track?loc=en_US&tracknum=1Z965EW40228937186&requester=WT/trackdetails",
      "first_attempted_at": "2022-03-30T19:55:20-04:00",
      "courier_redirect_link": "https://www.ups.com/track?loc=en_US&tracknum=1Z965EW40228937186&requester=WT/trackdetails",
      "order_tags": [],
      "order_number": null,
      "aftership_estimated_delivery_date": null,
      "on_time_status": null,
      "on_time_difference": null,
      "tracking_account_number": null,
      "tracking_origin_country": null,
      "tracking_destination_country": null,
      "tracking_key": null,
      "tracking_postal_code": null,
      "tracking_ship_date": null,
      "tracking_state": null
    }
  }
}

我需要将JSONObject中的数据放入2个Java对象中。
"data": { "tracking": {下的一些数据进入Java对象Tracking（匹配变量名），检查点列表+ tracking_number（在每个检查点对象中）进入Java对象Checkpoint
跟踪类

@PrimaryKey
@NonNull
@ColumnInfo(name = "Tracking_number")
public String trackingNumber;

/**Unique code of each courier. If you do not specify a slug, Aftership will automatically detect
 * the courier based on the tracking number format and your selected couriers*/
@ColumnInfo(name = "slug")
public String slug;

/**Memo of the tracking. Default value as trackingNumber */
@ColumnInfo(name = "memo")
public String memo;

/**Customer name of the tracking. */
@ColumnInfo(name = "Customer_Name")
public String customerName;

/**ISO Alpha-3(three letters)to specify the destination of the shipment.
 * If you use postal service to send international shipments, AfterShip will automatically
 * get tracking results at destination courier as well (e.g. USPS for USA). */
@ColumnInfo(name = "Destination_Country")
public String destinationCountryISO3;

/**Origin country of the tracking. ISO Alpha-3 */
@ColumnInfo(name = "Origin_Country")
public String originCountryISO3;

/**fields informed by Aftership API*/

/**Date and time of the tracking created. */
@ColumnInfo(name = "Created_date")
public String createdAt;

/**Date and time of the tracking last updated. */
@ColumnInfo(name = "Last_updated")
public String updatedAt;

/**Whether or not AfterShip will continue tracking the shipments.
 * Value is `false` when status is `Delivered` or `Expired`. */
@ColumnInfo(name = "Active_status")
public boolean active;

/**Expected delivery date (if any). */
@ColumnInfo(name = "Expected_delivery")
public String expectedDelivery;

/**Number Number of packages under the tracking. */
@ColumnInfo(name = "Package_count")
public int shipmentPackageCount;

/**Shipment type provided by carrier (if any). */
@ColumnInfo(name = "Shipment_type")
public String shipmentType;

/**Signed by information for delivered shipment (if any). */
@ColumnInfo(name = "Signed_by")
public String signedBy;

/**Current status of tracking. */
@ColumnInfo(name = "Tag")
public String tag;

/**Number of attempts AfterShip tracks at courier's system. */
@ColumnInfo(name = "Tracked_count")
public int trackedCount;

/**Tracking postal code tracking_postal_code*/
@ColumnInfo(name = "Tracking_postal_code")
public String trackingPostalCode;

/**Tracking ship date tracking_ship_date*/
@ColumnInfo(name = "Tracking_ship_date")
public String trackingShipDate;

检查点类

@PrimaryKey
@ColumnInfo(name = "Tracking_number")
@NonNull
public String trackingNumber;

/**Date and time of the tracking created. */
@ColumnInfo(name = "Date_created")
public String createdAt;

/**Date and time of the checkpoint, provided by courier. Value may be:
 Empty String,
 YYYY-MM-DD,
 YYYY-MM-DDTHH:MM:SS, or
 YYYY-MM-DDTHH:MM:SS+TIMEZONE */
@ColumnInfo(name = "Checkpoint_time")
public String checkpointTime;

/**Location info (if any) */
@ColumnInfo(name = "City")
public String city;

/**Country ISO Alpha-3 (three letters) of the checkpoint */
@ColumnInfo(name = "Country_ISO")
public String countryISO3;

/**Country name of the checkpoint, may also contain other location info. */
@ColumnInfo(name = "Country_name")
public String countryName;

/**Checkpoint message */
@ColumnInfo(name = "Message")
public String message;

/**Location info (if any) */
@ColumnInfo(name = "State")
public String state;

/**Status of the checkpoint */
@ColumnInfo(name = "tag")
public String tag;

/**Location info (if any) */
@ColumnInfo(name = "Postal_code")
public String zip;

这是我目前将JSONObject转换为Tracking对象所需要的，但它转换了整个JSONObject，而我只需要Tracking类中存在的数据字段。对于检查点，我需要将JSONObject中的检查点列表转换为检查点对象列表。

Gson gson = new Gson();
        Tracking tracking = gson.fromJson(trackingJSON.getJSONObject("tracking").toString(), Tracking.class);
Gson

1条答案

按热度按时间
qv7cva1a

qv7cva1a1#

由于trackingJSON显然已经包含了DOM格式的解析JSON，因此最简单的方法是手动提取checkpoints属性，然后让Gson分别对其进行反序列化，例如：

JSONObject trackingJson = trackingJSON.getJSONObject("tracking");
// Uses `remove` to avoid unnecessary conversion when calling `trackingData.toString()`
JSONArray checkpointsJson = (JSONArray) trackingData.remove("checkpoints");

Tracking tracking = gson.fromJson(trackingJson.toString(), Tracking.class);
List<Checkpoint> checkpoints = gson.fromJson(checkpointsJson.toString(),
    new TypeToken<List<Checkpoint>>() {}.getType());

// Manually set the tracking number
checkpoints.forEach(c -> c.trackingNumber = tracking.trackingNumber);
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