Unity jsonutility failed to serialize list

1、 The phenomenon

JsonUtility.ToJson Serialized as {}

2、 reason

although Unity Provides JsonUtility, but List Cannot be serialized and stored directly

3、 Solution

Custom class

3.1 Add code

[Serializable]
public class Serialization<T>
{
    
    [SerializeField]
    List<T> target;
    public List<T> ToList() {
     return target; }

    public Serialization(List<T> target)
    {
    
        this.target = target;
    }
}

3.2 Use

Ranking For the class to serialize

string result = JsonUtility.ToJson(new Serialization<Ranking>(rankingList));

return JsonUtility.FromJson<Serialization<Ranking>>(list).ToList();