使用匿名结构进行解码

使用匿名结构的目的是仅解码我们关心的信息，而不会使用仅在单个函数中使用的类型乱丢我们的应用程序。

jsonBlob := []byte(`
  {
    "_total": 1,
    "_links": {
      "self": "https://api.twitch.tv/kraken/channels/foo/subscriptions?direction=ASC&limit=25&offset=0",
      "next": "https://api.twitch.tv/kraken/channels/foo/subscriptions?direction=ASC&limit=25&offset=25"
    },
    "subscriptions": [
      {
        "created_at": "2011-11-23T02:53:17Z",
        "_id": "abcdef0000000000000000000000000000000000",
        "_links": {
          "self": "https://api.twitch.tv/kraken/channels/foo/subscriptions/bar"
        },
        "user": {
          "display_name": "bar",
          "_id": 123456,
          "name": "bar",
          "staff": false,
          "created_at": "2011-06-16T18:23:11Z",
          "updated_at": "2014-10-23T02:20:51Z",
          "logo": null,
          "_links": {
            "self": "https://api.twitch.tv/kraken/users/bar"
          }
        }
      }
    ]
  }
`)

var js struct {
    Total int `json:"_total"`
    Links struct {
        Next string `json:"next"`
    } `json:"_links"`
    Subs []struct {
        Created string `json:"created_at"`
        User    struct {
            Name string `json:"name"`
            ID   int    `json:"_id"`
        } `json:"user"`
    } `json:"subscriptions"`
}

err := json.Unmarshal(jsonBlob, &js)
if err != nil {
    fmt.Println("error:", err)
}
fmt.Printf("%+v", js)

输出：{Total:1 Links:{Next:https://api.twitch.tv/kraken/channels/foo/subscriptions?direction=ASC&limit=25&offset=25} Subs:[{Created:2011-11-23T02:53:17Z User:{Name:bar ID:123456}}]}

操场

对于一般情况，另见： Go structs 编码和解码。