使用列表的方式儲存JSON檔案到本地，，雖然可以實現，但是讀取的時候總出現各種問題，也許是個人水平有限，，個人還是感覺用Dictionary這種鍵值對的方式儲存，更新讀取都很方便，推薦檢視：點選連結，，

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using LitJson;
using System.IO;

public class Person
    {
        public string Name { get; set; }
        public double
 
 HP { get; set; }
        public int Level { get; set; }
        public double Exp { get; set; }
        public int Attak { get; set; }

    }
public class PersonList
    {
        public List<Person> list = new List<Person>();
    }

public class Classtext : MonoBehaviour {


    public
 
 PersonList personList = null;

    // Use this for initialization
    void Start () {
        Person person = new Person();
        person.Name = "Czhenya";
        person.HP = 100;
        person.Level = 30;
        person.Exp = 3333.33;
        person.Attak = 50;

        string json1 = JsonMapper.ToJson(person);
        Debug.Log(json1.ToString());

        Save(person);

    }
    ///
 
 <summary>
    /// 儲存JSON資料到本地的方法
    /// </summary>
    /// <param name="player">要儲存的物件</param>
    public void Save(Person player)
    {
        string filePath = Application.dataPath + @"/JsonPerson.json";

       // Debug.Log(Application.dataPath + @"/JsonPerson.json");

        personList = new PersonList();
        if (!File.Exists(filePath))
        {          
            personList.list.Add(player);
        }
        else
        {
            //若沒有資訊則新建，有則 更新，，，
            bool bFind = false;
            //遍歷列表
            for (int i = 0; i < personList.list.Count; i++)
            {                
                Person savePlayer = personList.list[i];
                if (player.Name == savePlayer.Name)
                {
                    savePlayer.Level = player.Level;
                    savePlayer.HP = player.Level;
                    savePlayer.Exp = player.Exp;
                    savePlayer.Attak = savePlayer.Attak;

                bFind = true;
                    break;
                }
            }
            if (!bFind)
            {
                personList.list.Add(player);

            }
        }

        //找到當前路徑
        FileInfo file = new FileInfo(filePath);
        //判斷有沒有檔案，有則開啟檔案，，沒有建立後開啟檔案
        StreamWriter sw = file.CreateText();
        //ToJson介面將你的列表類傳進去，，並自動轉換為string型別
        string json = JsonMapper.ToJson(personList.list);
        //將轉換好的字串存進檔案，
        sw.WriteLine(json);
        sw.Close();
        sw.Dispose();
    }
}

下面是執行後，新創建出來的JsonPerson.json檔案的內容，，，

[{"Name":"Czhenya","HP":100.0,"Level":30,"Exp":3333.33,"Attak":50}]