unity Json创建、读取、修改、

使用Newtonsoft.Json

using Newtonsoft.Json;
using System.Collections;
using System.IO;
using System.Text;
using UnityEditor;
using UnityEngine;
using UnityEngine.Networking;
using Newtonsoft.Json.Linq;

public class SetJson : MonoBehaviour
{
    private string path = Application.streamingAssetsPath + "/save.json";
    private string content;
    private int[] nums = { 20, 50, 40, 100 };
    private TestStruct[] testStructs;

    //----------
    public StudentData data;

    private void Start()
    {
        CreateFile();
    }

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            StartCoroutine(ReadJson());
        }
        if (Input.GetKeyDown(KeyCode.M))
        {
            StartCoroutine(JsonToObject());
        }
        if (Input.GetKeyDown(KeyCode.N))
        {
            ChangeJson();
        }
    }

    private void CreateFile()
    {
        Grade grade = new Grade();
        grade.math = 80;
        grade.physics = 80;
        grade.english = 80;

        testStructs = new TestStruct[10];
        for (int i = 0; i < 10; i++)
        {
            testStructs[i].name = "Test_" + i;
            testStructs[i].content = "content_" + i;
        }

        StudentData studentData = new StudentData();
        studentData.id = 1001;
        studentData.name = "Test";
        studentData.sexType = SexType.Male;
        studentData.age = 20;
        studentData.bCylet = false;
        studentData.grade = grade;
        studentData.nums = nums;
        studentData.testStructs = testStructs;

        content = JsonConvert.SerializeObject(studentData);
        Save(content);
        //   Debug.Log("path:"+path);
    }

    public void Save(string content)
    {
        FileInfo file = new FileInfo(path);//判断文件是否存在
        if (!file.Exists)   //此方法只能在Windows平台
        {
            FileStream fs = new FileStream(path, FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            byte[] bytes = new UTF8Encoding().GetBytes(content);
            fs.Write(bytes, 0, bytes.Length);
            fs.Close();
            Debug.Log("Create OK");
            AssetDatabase.Refresh();
        }
        else
        {
            Debug.Log("已存在json");
        }
    }

    private IEnumerator ReadJson()
    {
        UnityWebRequest unityWebRequest = UnityWebRequest.Get(path);
        yield return unityWebRequest.SendWebRequest();
        if (unityWebRequest.isNetworkError)
        {
            Debug.LogError("出错");
        }
        string content = unityWebRequest.downloadHandler.text;
        data = JsonConvert.DeserializeObject<StudentData>(content);
        Debug.LogError(data.testStructs[1].name);
    }

    private void ChangeJson()
    {
        if (File.Exists(path))
            File.Delete(path);
        if (data == null)
        {
            StartCoroutine(ReadJson());
        }
        data.testStructs[1].name = "000000";
        content = JsonConvert.SerializeObject(data);
        Save(content);
        Debug.Log("Change OK");
    }

    private IEnumerator JsonToObject()
    {
        UnityWebRequest unityWebRequest = UnityWebRequest.Get(path);
        yield return unityWebRequest.SendWebRequest();
        if (unityWebRequest.isNetworkError)
        {
            Debug.LogError("出错");
        }
        string content = unityWebRequest.downloadHandler.text;
        JObject jobject = (JObject)JsonConvert.DeserializeObject(content);
        Debug.LogError(jobject["id"]);
    }
}

JSON结构

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