MazeSerialization.cs

namespace Tmp
{
    using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    using System;

    [Serializable]
    public class mazeCube
    {
        public int preFabType;
        public Vector3 position;
        public Vector3 rotation;
    }

    [Serializable]
    public class mazesData
    {
        public mazeCube[] datas;
    }

    public class MazeSerialization : MonoBehaviour
    {
        public Transform MazeRoot;
        public void MazeToJson()
        {
            List<mazeCube> cubes = new List<mazeCube>();
            foreach (Transform child in MazeRoot)
            {
                mazeCube cube = new mazeCube();
                cube.position = child.localPosition;
                cube.rotation = child.localEulerAngles;
                cube.preFabType = 0;  //Should assign prefab type
                cubes.Add(cube);
            }
            mazesData data = new mazesData();
            data.datas = cubes.ToArray();
            string json = JsonUtility.ToJson(data);
            print(json);
            SaveEncodedFile(json, "maze.json");
        }
        public void SaveEncodedFile(String data, String fileName)
        {
            string path = Application.persistentDataPath;

            File.WriteAllText(path + "/" + fileName, data);
        }
        
        public TextAsset JsonTextFile;//Assign from inspector
        public Transform CloneMazeRoot;//The root of the re-created maze
        public GameObject[] Prefabs;
        public void JsonToMaze()
        {
            mazesData mazeDatas2 = JsonUtility.FromJson<mazesData>(JsonTextFile.text);
            foreach (var d in mazeDatas2.datas)
            {
                var cube_instant = Instantiate(Prefabs[d.preFabType]);
                cube_instant.transform.SetParent(CloneMazeRoot);
                cube_instant.transform.localPosition = d.position;
                cube_instant.transform.localEulerAngles = d.rotation;
                cube_instant.transform.localScale = new Vector3(0.5f, 0.5f, 0.5f);
            }
        }
    }
}