Things to note when using JsonUtility to write json data in unity

Use JsonUtility in unity to write objects to json files

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

/// <summary>
/// 数据存储类，存放从外部读取的json数据---可以用结构体，这样占用会更小
/// </summary>

public class DataSave
{
    
    
        public string name;

        public string version;

        public string date;

        public List<string> max_List = new List<string>();

        public List<main_list> main_List = new List<main_list>();

        
}
[Serializable]
public class main_list
{
    
    
        public int id;

        public string name;

        public List<sub_list> sub_List = new List<sub_list>();
}

[Serializable]
public class sub_list
{
    
    
        public int id;

        public string name;

        public List<process_list> process_List = new List<process_list>();
}

[Serializable]
public class process_list
{
    
    
        public int id;

        public string name;

        public string model_name {
    
     get; set; }//目前用不上

        //public int animation_type { get; set; }//目前用不上
}

1. The [Serializable] above needs to be added, otherwise the data cannot be read.
2. The public int id; attribute should not be written as public int id { get; set; }, otherwise the data in the object will not be read.
3.