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(214)

我从一个API得到这个JSONObject响应

  1. {
  2.   "meta": {
  3.     "code": 200
  4.   },
  5.   "data": {
  6.     "tracking": {
  7.       "id": "lk46hwgbadfqcl2fyacyw00q",
  8.       "created_at": "2022-04-26T09:33:13+00:00",
  9.       "updated_at": "2022-04-26T09:33:14+00:00",
  10.       "last_updated_at": "2022-04-26T09:33:14+00:00",
  11.       "tracking_number": "1Z965EW40228937186",
  12.       "slug": "ups",
  13.       "active": false,
  14.       "android": [],
  15.       "custom_fields": null,
  16.       "customer_name": null,
  17.       "delivery_time": 20,
  18.       "destination_country_iso3": "USA",
  19.       "courier_destination_country_iso3": "USA",
  20.       "emails": [],
  21.       "expected_delivery": null,
  22.       "ios": [],
  23.       "note": null,
  24.       "order_id": null,
  25.       "order_id_path": null,
  26.       "order_date": null,
  27.       "origin_country_iso3": "USA",
  28.       "shipment_package_count": null,
  29.       "shipment_pickup_date": "2022-03-28T19:45:12-07:00",
  30.       "shipment_delivery_date": "2022-04-16T16:04:15",
  31.       "shipment_type": "UPS 2nd Day Air®",
  32.       "shipment_weight": 15.8,
  33.       "shipment_weight_unit": "lb",
  34.       "signed_by": "DRIVER RELEASE",
  35.       "smses": [],
  36.       "source": "api",
  37.       "tag": "Delivered",
  38.       "subtag": "Delivered_001",
  39.       "subtag_message": "Delivered",
  40.       "title": "dd",
  41.       "tracked_count": 1,
  42.       "last_mile_tracking_supported": true,
  43.       "language": null,
  44.       "unique_token": "deprecated",
  45.       "checkpoints": [
  46.         {
  47.           "slug": "ups",
  48.           "city": null,
  49.           "created_at": "2022-04-26T09:33:14+00:00",
  50.           "location": "US, United States",
  51.           "country_name": "USA",
  52.           "message": "Shipper created a label, UPS has not received the package yet.",
  53.           "country_iso3": "USA",
  54.           "tag": "InfoReceived",
  55.           "subtag": "InfoReceived_001",
  56.           "subtag_message": "Info Received",
  57.           "checkpoint_time": "2022-03-28T15:55:14-07:00",
  58.           "coordinates": [],
  59.           "state": null,
  60.           "zip": null,
  61.           "raw_tag": "MP"
  62.         },
  63.         {
  64.           "slug": "ups",
  65.           "city": "Goodyear",
  66.           "created_at": "2022-04-26T09:33:14+00:00",
  67.           "location": "Goodyear, AZ, US, United States",
  68.           "country_name": "USA",
  69.           "message": "Origin Scan",
  70.           "country_iso3": "USA",
  71.           "tag": "InTransit",
  72.           "subtag": "InTransit_002",
  73.           "subtag_message": "Acceptance scan",
  74.           "checkpoint_time": "2022-03-28T19:45:12-07:00",
  75.           "coordinates": [],
  76.           "state": "AZ",
  77.           "zip": null,
  78.           "raw_tag": "OR"
  79.         },
  80.         {
  81.           "slug": "ups",
  82.           "city": "Goodyear",
  83.           "created_at": "2022-04-26T09:33:14+00:00",
  84.           "location": "Goodyear, AZ, US, United States",
  85.           "country_name": "USA",
  86.           "message": "Departed from Facility",
  87.           "country_iso3": "USA",
  88.           "tag": "InTransit",
  89.           "subtag": "InTransit_007",
  90.           "subtag_message": "Departure Scan",
  91.           "checkpoint_time": "2022-03-29T00:38:00-07:00",
  92.           "coordinates": [],
  93.           "state": "AZ",
  94.           "zip": null,
  95.           "raw_tag": "DP"
  96.         },
  97.         {
  98.           "slug": "ups",
  99.           "city": "Phoenix",
  100.           "created_at": "2022-04-26T09:33:14+00:00",
  101.           "location": "Phoenix, AZ, US, United States",
  102.           "country_name": "USA",
  103.           "message": "Arrived at Facility",
  104.           "country_iso3": "USA",
  105.           "tag": "InTransit",
  106.           "subtag": "InTransit_003",
  107.           "subtag_message": "Arrival scan",
  108.           "checkpoint_time": "2022-03-29T01:18:00-07:00",
  109.           "coordinates": [],
  110.           "state": "AZ",
  111.           "zip": null,
  112.           "raw_tag": "AR"
  113.         },
  114.         {
  115.           "slug": "ups",
  116.           "city": "Phoenix",
  117.           "created_at": "2022-04-26T09:33:14+00:00",
  118.           "location": "Phoenix, AZ, US, United States",
  119.           "country_name": "USA",
  120.           "message": "Departed from Facility",
  121.           "country_iso3": "USA",
  122.           "tag": "InTransit",
  123.           "subtag": "InTransit_007",
  124.           "subtag_message": "Departure Scan",
  125.           "checkpoint_time": "2022-03-29T05:43:00-07:00",
  126.           "coordinates": [],
  127.           "state": "AZ",
  128.           "zip": null,
  129.           "raw_tag": "DP"
  130.         },
  131.         {
  132.           "slug": "ups",
  133.           "city": "Philadelphia",
  134.           "created_at": "2022-04-26T09:33:14+00:00",
  135.           "location": "Philadelphia, PA, US, United States",
  136.           "country_name": "USA",
  137.           "message": "Arrived at Facility",
  138.           "country_iso3": "USA",
  139.           "tag": "InTransit",
  140.           "subtag": "InTransit_003",
  141.           "subtag_message": "Arrival scan",
  142.           "checkpoint_time": "2022-03-29T12:54:00-04:00",
  143.           "coordinates": [],
  144.           "state": "PA",
  145.           "zip": null,
  146.           "raw_tag": "AR"
  147.         },
  148.         {
  149.           "slug": "ups",
  150.           "city": "Philadelphia",
  151.           "created_at": "2022-04-26T09:33:14+00:00",
  152.           "location": "Philadelphia, PA, US, United States",
  153.           "country_name": "USA",
  154.           "message": "Departed from Facility",
  155.           "country_iso3": "USA",
  156.           "tag": "InTransit",
  157.           "subtag": "InTransit_007",
  158.           "subtag_message": "Departure Scan",
  159.           "checkpoint_time": "2022-03-30T01:17:00-04:00",
  160.           "coordinates": [],
  161.           "state": "PA",
  162.           "zip": null,
  163.           "raw_tag": "DP"
  164.         },
  165.         {
  166.           "slug": "ups",
  167.           "city": "Landover",
  168.           "created_at": "2022-04-26T09:33:14+00:00",
  169.           "location": "Landover, MD, US, United States",
  170.           "country_name": "USA",
  171.           "message": "Arrived at Facility",
  172.           "country_iso3": "USA",
  173.           "tag": "InTransit",
  174.           "subtag": "InTransit_003",
  175.           "subtag_message": "Arrival scan",
  176.           "checkpoint_time": "2022-03-30T04:03:00-04:00",
  177.           "coordinates": [],
  178.           "state": "MD",
  179.           "zip": null,
  180.           "raw_tag": "AR"
  181.         },
  182.         {
  183.           "slug": "ups",
  184.           "city": "Landover",
  185.           "created_at": "2022-04-26T09:33:14+00:00",
  186.           "location": "Landover, MD, US, United States",
  187.           "country_name": "USA",
  188.           "message": "Processing at UPS Facility",
  189.           "country_iso3": "USA",
  190.           "tag": "InTransit",
  191.           "subtag": "InTransit_001",
  192.           "subtag_message": "In Transit",
  193.           "checkpoint_time": "2022-03-30T06:20:05-04:00",
  194.           "coordinates": [],
  195.           "state": "MD",
  196.           "zip": null,
  197.           "raw_tag": "YP"
  198.         },
  199.         {
  200.           "slug": "ups",
  201.           "city": "Landover",
  202.           "created_at": "2022-04-26T09:33:14+00:00",
  203.           "location": "Landover, MD, US, United States",
  204.           "country_name": "USA",
  205.           "message": "Out For Delivery Today",
  206.           "country_iso3": "USA",
  207.           "tag": "OutForDelivery",
  208.           "subtag": "OutForDelivery_001",
  209.           "subtag_message": "Out for Delivery",
  210.           "checkpoint_time": "2022-03-30T09:13:00-04:00",
  211.           "coordinates": [],
  212.           "state": "MD",
  213.           "zip": null,
  214.           "raw_tag": "OT"
  215.         },
  216.         {
  217.           "slug": "ups",
  218.           "city": "Landover",
  219.           "created_at": "2022-04-26T09:33:14+00:00",
  220.           "location": "Landover, MD, US, United States",
  221.           "country_name": "USA",
  222.           "message": "The receiver was not available for delivery. We'll make a second attempt the next business day.",
  223.           "country_iso3": "USA",
  224.           "tag": "AttemptFail",
  225.           "subtag": "AttemptFail_002",
  226.           "subtag_message": "Addreesee not available",
  227.           "checkpoint_time": "2022-03-30T19:55:20-04:00",
  228.           "coordinates": [],
  229.           "state": "MD",
  230.           "zip": null,
  231.           "raw_tag": "48"
  232.         },
  233.         {
  234.           "slug": "ups",
  235.           "city": "Landover",
  236.           "created_at": "2022-04-26T09:33:14+00:00",
  237.           "location": "Landover, MD, US, United States",
  238.           "country_name": "USA",
  239.           "message": "Out For Delivery Today",
  240.           "country_iso3": "USA",
  241.           "tag": "OutForDelivery",
  242.           "subtag": "OutForDelivery_001",
  243.           "subtag_message": "Out for Delivery",
  244.           "checkpoint_time": "2022-03-31T09:03:56-04:00",
  245.           "coordinates": [],
  246.           "state": "MD",
  247.           "zip": null,
  248.           "raw_tag": "OT"
  249.         },
  250.         {
  251.           "slug": "ups",
  252.           "city": "Landover",
  253.           "created_at": "2022-04-26T09:33:14+00:00",
  254.           "location": "Landover, MD, US, United States",
  255.           "country_name": "USA",
  256.           "message": "The receiver was not available for delivery. We'll make a second attempt the next business day.",
  257.           "country_iso3": "USA",
  258.           "tag": "AttemptFail",
  259.           "subtag": "AttemptFail_002",
  260.           "subtag_message": "Addreesee not available",
  261.           "checkpoint_time": "2022-03-31T20:17:04-04:00",
  262.           "coordinates": [],
  263.           "state": "MD",
  264.           "zip": null,
  265.           "raw_tag": "48"
  266.         },
  267.         {
  268.           "slug": "ups",
  269.           "city": "Landover",
  270.           "created_at": "2022-04-26T09:33:14+00:00",
  271.           "location": "Landover, MD, US, United States",
  272.           "country_name": "USA",
  273.           "message": "Out For Delivery Today",
  274.           "country_iso3": "USA",
  275.           "tag": "OutForDelivery",
  276.           "subtag": "OutForDelivery_001",
  277.           "subtag_message": "Out for Delivery",
  278.           "checkpoint_time": "2022-04-01T09:33:30-04:00",
  279.           "coordinates": [],
  280.           "state": "MD",
  281.           "zip": null,
  282.           "raw_tag": "OT"
  283.         },
  284.         {
  285.           "slug": "ups",
  286.           "city": "Landover",
  287.           "created_at": "2022-04-26T09:33:14+00:00",
  288.           "location": "Landover, MD, US, United States",
  289.           "country_name": "USA",
  290.           "message": "The receiver was not available for delivery. We'll make a second attempt the next business day.",
  291.           "country_iso3": "USA",
  292.           "tag": "AttemptFail",
  293.           "subtag": "AttemptFail_002",
  294.           "subtag_message": "Addreesee not available",
  295.           "checkpoint_time": "2022-04-01T18:17:11-04:00",
  296.           "coordinates": [],
  297.           "state": "MD",
  298.           "zip": null,
  299.           "raw_tag": "48"
  300.         },
  301.         {
  302.           "slug": "ups",
  303.           "city": "Landover",
  304.           "created_at": "2022-04-26T09:33:14+00:00",
  305.           "location": "Landover, MD, US, United States",
  306.           "country_name": "USA",
  307.           "message": "Processing at UPS Facility",
  308.           "country_iso3": "USA",
  309.           "tag": "InTransit",
  310.           "subtag": "InTransit_001",
  311.           "subtag_message": "In Transit",
  312.           "checkpoint_time": "2022-04-02T03:34:21-04:00",
  313.           "coordinates": [],
  314.           "state": "MD",
  315.           "zip": null,
  316.           "raw_tag": "YP"
  317.         },
  318.         {
  319.           "slug": "ups",
  320.           "city": "Landover",
  321.           "created_at": "2022-04-26T09:33:14+00:00",
  322.           "location": "Landover, MD, US, United States",
  323.           "country_name": "USA",
  324.           "message": "Loaded on Delivery Vehicle",
  325.           "country_iso3": "USA",
  326.           "tag": "OutForDelivery",
  327.           "subtag": "OutForDelivery_001",
  328.           "subtag_message": "Out for Delivery",
  329.           "checkpoint_time": "2022-04-02T03:49:53-04:00",
  330.           "coordinates": [],
  331.           "state": "MD",
  332.           "zip": null,
  333.           "raw_tag": "OF"
  334.         },
  335.         {
  336.           "slug": "ups",
  337.           "city": "Landover",
  338.           "created_at": "2022-04-26T09:33:14+00:00",
  339.           "location": "Landover, MD, US, United States",
  340.           "country_name": "USA",
  341.           "message": "Out For Delivery Today",
  342.           "country_iso3": "USA",
  343.           "tag": "OutForDelivery",
  344.           "subtag": "OutForDelivery_001",
  345.           "subtag_message": "Out for Delivery",
  346.           "checkpoint_time": "2022-04-02T09:49:40-04:00",
  347.           "coordinates": [],
  348.           "state": "MD",
  349.           "zip": null,
  350.           "raw_tag": "OT"
  351.         },
  352.         {
  353.           "slug": "ups",
  354.           "city": "Landover",
  355.           "created_at": "2022-04-26T09:33:14+00:00",
  356.           "location": "Landover, MD, US, United States",
  357.           "country_name": "USA",
  358.           "message": "Package was driver released",
  359.           "country_iso3": "USA",
  360.           "tag": "InTransit",
  361.           "subtag": "InTransit_001",
  362.           "subtag_message": "In Transit",
  363.           "checkpoint_time": "2022-04-02T17:00:44-04:00",
  364.           "coordinates": [],
  365.           "state": "MD",
  366.           "zip": null,
  367.           "raw_tag": "FS"
  368.         },
  369.         {
  370.           "slug": "ups",
  371.           "city": "Bronx",
  372.           "created_at": "2022-04-26T09:33:14+00:00",
  373.           "location": "Bronx, NY, US, United States",
  374.           "country_name": "USA",
  375.           "message": "The receiver refused, the package appeared to be damaged. UPS will notify the sender with the details.",
  376.           "country_iso3": "USA",
  377.           "tag": "Exception",
  378.           "subtag": "Exception_003",
  379.           "subtag_message": "Customer refused delivery",
  380.           "checkpoint_time": "2022-04-14T15:08:16-04:00",
  381.           "coordinates": [],
  382.           "state": "NY",
  383.           "zip": null,
  384.           "raw_tag": "KQ"
  385.         },
  386.         {
  387.           "slug": "ups",
  388.           "city": "Great Falls",
  389.           "created_at": "2022-04-26T09:33:14+00:00",
  390.           "location": "Great Falls, MT, US, United States",
  391.           "country_name": "USA",
  392.           "message": "Package was driver released",
  393.           "country_iso3": "USA",
  394.           "tag": "InTransit",
  395.           "subtag": "InTransit_001",
  396.           "subtag_message": "In Transit",
  397.           "checkpoint_time": "2022-04-15T16:04:15-06:00",
  398.           "coordinates": [],
  399.           "state": "MT",
  400.           "zip": null,
  401.           "raw_tag": "FS"
  402.         },
  403.         {
  404.           "slug": "ups",
  405.           "city": "GOODYEAR",
  406.           "created_at": "2022-04-26T09:33:14+00:00",
  407.           "location": "GOODYEAR, AZ, US, United States",
  408.           "country_name": "USA",
  409.           "message": "DELIVERED",
  410.           "country_iso3": "USA",
  411.           "tag": "Delivered",
  412.           "subtag": "Delivered_001",
  413.           "subtag_message": "Delivered",
  414.           "checkpoint_time": "2022-04-16T16:04:15-06:00",
  415.           "coordinates": [],
  416.           "state": "AZ",
  417.           "zip": null,
  418.           "raw_tag": "FS"
  419.         }
  420.       ],
  421.       "subscribed_smses": [],
  422.       "subscribed_emails": [],
  423.       "return_to_sender": false,
  424.       "order_promised_delivery_date": null,
  425.       "delivery_type": null,
  426.       "pickup_location": null,
  427.       "pickup_note": null,
  428.       "courier_tracking_link": "https://www.ups.com/track?loc=en_US&tracknum=1Z965EW40228937186&requester=WT/trackdetails",
  429.       "first_attempted_at": "2022-03-30T19:55:20-04:00",
  430.       "courier_redirect_link": "https://www.ups.com/track?loc=en_US&tracknum=1Z965EW40228937186&requester=WT/trackdetails",
  431.       "order_tags": [],
  432.       "order_number": null,
  433.       "aftership_estimated_delivery_date": null,
  434.       "on_time_status": null,
  435.       "on_time_difference": null,
  436.       "tracking_account_number": null,
  437.       "tracking_origin_country": null,
  438.       "tracking_destination_country": null,
  439.       "tracking_key": null,
  440.       "tracking_postal_code": null,
  441.       "tracking_ship_date": null,
  442.       "tracking_state": null
  443.     }
  444.   }
  445. }

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

  1. @PrimaryKey
  2. @NonNull
  3. @ColumnInfo(name = "Tracking_number")
  4. public String trackingNumber;
  6. /**Unique code of each courier. If you do not specify a slug, Aftership will automatically detect
  7.  * the courier based on the tracking number format and your selected couriers*/
  8. @ColumnInfo(name = "slug")
  9. public String slug;
  11. /**Memo of the tracking. Default value as trackingNumber */
  12. @ColumnInfo(name = "memo")
  13. public String memo;
  15. /**Customer name of the tracking. */
  16. @ColumnInfo(name = "Customer_Name")
  17. public String customerName;
  19. /**ISO Alpha-3(three letters)to specify the destination of the shipment.
  20.  * If you use postal service to send international shipments, AfterShip will automatically
  21.  * get tracking results at destination courier as well (e.g. USPS for USA). */
  22. @ColumnInfo(name = "Destination_Country")
  23. public String destinationCountryISO3;
  25. /**Origin country of the tracking. ISO Alpha-3 */
  26. @ColumnInfo(name = "Origin_Country")
  27. public String originCountryISO3;
  29. /**fields informed by Aftership API*/
  31. /**Date and time of the tracking created. */
  32. @ColumnInfo(name = "Created_date")
  33. public String createdAt;
  35. /**Date and time of the tracking last updated. */
  36. @ColumnInfo(name = "Last_updated")
  37. public String updatedAt;
  39. /**Whether or not AfterShip will continue tracking the shipments.
  40.  * Value is `false` when status is `Delivered` or `Expired`. */
  41. @ColumnInfo(name = "Active_status")
  42. public boolean active;
  44. /**Expected delivery date (if any). */
  45. @ColumnInfo(name = "Expected_delivery")
  46. public String expectedDelivery;
  48. /**Number Number of packages under the tracking. */
  49. @ColumnInfo(name = "Package_count")
  50. public int shipmentPackageCount;
  52. /**Shipment type provided by carrier (if any). */
  53. @ColumnInfo(name = "Shipment_type")
  54. public String shipmentType;
  56. /**Signed by information for delivered shipment (if any). */
  57. @ColumnInfo(name = "Signed_by")
  58. public String signedBy;
  60. /**Current status of tracking. */
  61. @ColumnInfo(name = "Tag")
  62. public String tag;
  64. /**Number of attempts AfterShip tracks at courier's system. */
  65. @ColumnInfo(name = "Tracked_count")
  66. public int trackedCount;
  68. /**Tracking postal code tracking_postal_code*/
  69. @ColumnInfo(name = "Tracking_postal_code")
  70. public String trackingPostalCode;
  72. /**Tracking ship date tracking_ship_date*/
  73. @ColumnInfo(name = "Tracking_ship_date")
  74. public String trackingShipDate;

检查点类

  1. @PrimaryKey
  2. @ColumnInfo(name = "Tracking_number")
  3. @NonNull
  4. public String trackingNumber;
  6. /**Date and time of the tracking created. */
  7. @ColumnInfo(name = "Date_created")
  8. public String createdAt;
  10. /**Date and time of the checkpoint, provided by courier. Value may be:
  11.  Empty String,
  12.  YYYY-MM-DD,
  13.  YYYY-MM-DDTHH:MM:SS, or
  14.  YYYY-MM-DDTHH:MM:SS+TIMEZONE */
  15. @ColumnInfo(name = "Checkpoint_time")
  16. public String checkpointTime;
  18. /**Location info (if any) */
  19. @ColumnInfo(name = "City")
  20. public String city;
  22. /**Country ISO Alpha-3 (three letters) of the checkpoint */
  23. @ColumnInfo(name = "Country_ISO")
  24. public String countryISO3;
  26. /**Country name of the checkpoint, may also contain other location info. */
  27. @ColumnInfo(name = "Country_name")
  28. public String countryName;
  30. /**Checkpoint message */
  31. @ColumnInfo(name = "Message")
  32. public String message;
  34. /**Location info (if any) */
  35. @ColumnInfo(name = "State")
  36. public String state;
  38. /**Status of the checkpoint */
  39. @ColumnInfo(name = "tag")
  40. public String tag;
  42. /**Location info (if any) */
  43. @ColumnInfo(name = "Postal_code")
  44. 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。

  1. Gson gson = new Gson();
  2.         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：

  1. JSONObject trackingJson = trackingJSON.getJSONObject("tracking");
  2. // Uses `remove` to avoid unnecessary conversion when calling `trackingData.toString()`
  3. JSONArray checkpointsJson = (JSONArray) trackingData.remove("checkpoints");
  5. Tracking tracking = gson.fromJson(trackingJson.toString(), Tracking.class);
  6. List<Checkpoint> checkpoints = gson.fromJson(checkpointsJson.toString(),
  7.     new TypeToken<List<Checkpoint>>() {}.getType());
  9. // Manually set the tracking number
  10. checkpoints.forEach(c -> c.trackingNumber = tracking.trackingNumber);
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