8

Apex で特定の形式の jsonObject を解析するにはどうすればよいですか?

id 属性を含む項目配列から List<String> が必要です。適切な方法は何ですか？

それを解析するために、コードでクラスを作成しようとします:

public class JSON2Apex {

    public class Items {
        public String kind;
        public String etag;
        public String id;
        public String status;
        public String htmlLink;
        public String created;
        public String updated;
        public String summary;
        public String description;
        public String location;
        public Creator creator;
        public Creator organizer;
        public Start start;
        public Start end;
        public String iCalUID;
        public Integer sequence;
        public Reminders reminders;
    }

    public class Reminders {
        public Boolean useDefault;
    }

    public class Start {
        public String dateTime;
    }

    public class Creator {
        public String email;
        public String displayName;
        public Boolean self;
    }

    public String kind;
    public String etag;
    public String summary;
    public String updated;
    public String timeZone;
    public String accessRole;
    public List<DefaultReminders> defaultReminders;
    public List<Items> items;

    public class DefaultReminders {
        public String method;
        public Integer minutes;
    }

}

しかし、このクラスでは、いくつかの予約済みキーワードが end 、 dateTime などのユーザーであることを示しているため、このアプローチをさらに進めることはできません。

{
    "kind": "calendar#events",
    "etag": "\"ZrhdJMCgpoUK_a5fT7XOC6xn46g/jAScaUzsyk9nbyyvTc1Wa3-tulA\"",
    "summary": "riteshmehandiratta@gmail.com",
    "updated": "2013-02-16T16:23:20.057Z",
    "timeZone": "Asia/Calcutta",
    "accessRole": "owner",
    "defaultReminders": [
        {
            "method": "email",
            "minutes": 10
        },
        {
            "method": "popup",
            "minutes": 10
        }
    ],
    "items": [
        {
            "kind": "calendar#event",
            "etag": "\"ZrhdJMCgpoUK_a5fT7XOC6xn46g/Z2NhbDAwMDAxMzU2MTQ1NTg1NjYxMDAw\"",
            "id": "ngo4lfq6q7c4dm8bej7m47e5lc",
            "status": "confirmed",
            "htmlLink": "https://www.google.com/calendar/event?eid=bmdvNGxmcTZxN2M0ZG04YmVqN200N2U1bGMgcml0ZXNobWVoYW5kaXJhdHRhQG0",
            "created": "2012-12-22T03:04:01.000Z",
            "updated": "2012-12-22T03:06:25.661Z",
            "summary": "hello",
            "description": "hgjgjh",
            "location": "hkhkhk",
            "creator": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "organizer": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "start": {
                "dateTime": "2013-01-01T10:00:00+05:30"
            },
            "end": {
                "dateTime": "2013-01-15T00:00:00+05:30"
            },
            "iCalUID": "ngo4lfq6q7c4dm8bej7m47e5lc@google.com",
            "sequence": 1,
            "reminders": {
                "useDefault": true
            }
        },
        {
            "kind": "calendar#event",
            "etag": "\"ZrhdJMCgpoUK_a5fT7XOC6xn46g/Z2NhbDAwMDAxMzYxMDMxNTg1OTYzMDAw\"",
            "id": "oap7nr7ukjug6euo24kvhmfbm0",
            "status": "confirmed",
            "htmlLink": "https://www.google.com/calendar/event?eid=b2FwN25yN3VranVnNmV1bzI0a3ZobWZibTAgcml0ZXNobWVoYW5kaXJhdHRhQG0",
            "created": "2013-02-16T16:19:45.000Z",
            "updated": "2013-02-16T16:19:45.963Z",
            "summary": "Hello World",
            "creator": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "organizer": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "start": {
                "dateTime": "2013-02-11T11:00:00+05:30"
            },
            "end": {
                "dateTime": "2013-02-11T12:00:00+05:30"
            },
            "iCalUID": "oap7nr7ukjug6euo24kvhmfbm0@google.com",
            "sequence": 0,
            "reminders": {
                "useDefault": true
            }
        },
        {
           "kind": "calendar#event",
           "etag": "\"ZrhdJMCgpoUK_a5fT7XOC6xn46g/Z2NhbDAwMDAxMzYxMDMxNjQxMDYzMDAw\"",
           "id": "k2mvqecqdgoudt6fl4e5hhqna0",
           "status": "confirmed",
           "htmlLink": "https://www.google.com/calendar/event?eid=azJtdnFlY3FkZ291ZHQ2Zmw0ZTVoaHFuYTAgcml0ZXNobWVoYW5kaXJhdHRhQG0",
           "created": "2013-02-16T16:20:41.000Z",
           "updated": "2013-02-16T16:20:41.063Z",
           "summary": "Hello Wol",
           "creator": {
               "email": "riteshmehandiratta@gmail.com",
               "displayName": "RITESH MEHANDIRATTA",
               "self": true
           },
           "organizer": {
               "email": "riteshmehandiratta@gmail.com",
               "displayName": "RITESH MEHANDIRATTA",
               "self": true
           },
           "start": {
               "dateTime": "2013-02-11T13:00:00+05:30"
           },
           "end": {
               "dateTime": "2013-02-11T14:00:00+05:30"
           },
           "iCalUID": "k2mvqecqdgoudt6fl4e5hhqna0@google.com",
           "sequence": 0,
           "reminders": {
               "useDefault": true
           }
        },
        {
            "kind": "calendar#event",
            "etag": "\"ZrhdJMCgpoUK_a5fT7XOC6xn46g/Z2NhbDAwMDAxMzYxMDMxNjUyNDE1MDAw\"",
            "id": "0n2if07oo9pvfdnf7f0a6cldns",
            "status": "confirmed",
            "htmlLink": "https://www.google.com/calendar/event?eid=MG4yaWYwN29vOXB2ZmRuZjdmMGE2Y2xkbnMgcml0ZXNobWVoYW5kaXJhdHRhQG0",
            "created": "2013-02-16T16:20:52.000Z",
            "updated": "2013-02-16T16:20:52.415Z",
            "summary": "Hello World1",
            "creator": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "organizer": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "start": {
                "dateTime": "2013-02-11T15:30:00+05:30"
            },
            "end": {
                "dateTime": "2013-02-11T16:30:00+05:30"
            },
            "iCalUID": "0n2if07oo9pvfdnf7f0a6cldns@google.com",
            "sequence": 0,
            "reminders": {
                "useDefault": true
            }
        },
        {
            "kind": "calendar#event",
            "etag": "\"ZrhdJMCgpoUK_a5fT7XOC6xn46g/Z2NhbDAwMDAxMzYxMDMxNzcwNDMzMDAw\"",
            "id": "r365lrv775bqjiplmaqjro9grc",
            "status": "confirmed",
            "htmlLink": "https://www.google.com/calendar/event?eid=cjM2NWxydjc3NWJxamlwbG1hcWpybzlncmMgcml0ZXNobWVoYW5kaXJhdHRhQG0",
            "created": "2013-02-16T16:22:50.000Z",
            "updated": "2013-02-16T16:22:50.433Z",
            "creator": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "organizer": {
                "email": "riteshmehandiratta@gmail.com",
                "displayName": "RITESH MEHANDIRATTA",
                "self": true
            },
            "start": {
                "dateTime": "2013-02-11T14:30:00+05:30"
            },
            "end": {
                "dateTime": "2013-02-11T15:30:00+05:30"
            },
            "iCalUID": "r365lrv775bqjiplmaqjro9grc@google.com",
            "sequence": 0,
            "reminders": {
                "useDefault": true
            }
        }
    ]
}
4

1 に答える 1

20

この関数を使用してdeserializeUntyped、プレーンなオブジェクト/リスト/マップ オブジェクトで JSON を操作できます。すべてを期待される型にキャストすることを覚えておく必要があります (Java の場合とまったく同じです)。したがって、各アイテムの id フィールドにアクセスするには、次のようにします。

public void parse() {
    Map<String, Object> root = (Map<String, Object>)JSON.deserializeUntyped(getJsonToParse());
    List<Object> items = (List<Object>)root.get('items');
    for (Object item : items) {
        Map<String, Object> i = (Map<String, Object>)item;
        System.debug(i.get('id'));
    }
}

次のデバッグ出力が生成されます。

デバッグ ログの結果

于 2013-02-16T18:11:17.553 に答える