使用JsonUtility.FromJson方法不需要额外引用第三方库。该方法只能读取json对象，而不能读取json数组。

        假如我们有如下的json数组：

[
{"id":1, "name":"first2021", "level":5, "score":100, "isUser":false},
{"id":2, "name":"second2022", "level":5, "score":90, "isUser":false},
{"id":3, "name":"third2023", "level":5, "score":50, "isUser":false},
{"id":4, "name":"fourth2024", "level":5, "score":30, "isUser":true},
{"id":5, "name":"fifth2025", "level":5, "score":20, "isUser":false},
{"id":6, "name":"sixth2026", "level":5, "score":10, "isUser":false}
]

        需要调整为：

{"rankDatas":[
{"id":1, "name":"first2021", "level":5, "score":100, "isUser":false},
{"id":2, "name":"second2022", "level":5, "score":90, "isUser":false},
{"id":3, "name":"third2023", "level":5, "score":50, "isUser":false},
{"id":4, "name":"fourth2024", "level":5, "score":30, "isUser":true},
{"id":5, "name":"fifth2025", "level":5, "score":20, "isUser":false},
{"id":6, "name":"sixth2026", "level":5, "score":10, "isUser":false}
]}

        我们将该文件放到Resources的json目录下，如下图所示：

我们创建RankData类存放反序列化之后的数据：

[System.Serializable]
public class RankData
{public int id;public string name;public int level;public int score;public bool isUser;
}[System.Serializable]
public class RankDataList
{public RankData[] rankDatas;
}

其中RankDataList -> rankDatas的名字必须和json文件中最外层的key保持一致，否则会读取不到数据。

读取json文件并解析的逻辑如下：

 TextAsset jsonText = Resources.Load<TextAsset>("json/rank_info");if(jsonText != null){string jsonData = jsonText.text;Debug.Log(jsonData);RankDataList rankDataList = JsonUtility.FromJson<RankDataList>(jsonData);foreach(var item in rankDataList.rankDatas){Debug.Log("id:" + item.id);}}else{Debug.LogError("Can't find JSON file.");}