Unity-Json解析

一、Json序列化（写入Json）

命名空间引入

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

定义一个JsonInfo类，在对此类进行赋值之后进行json序列化操作

    /// <summary>
    /// 文件路径
    /// </summary>
    private string filePath = "C:/david.json";

    private void Start()
    {
        WriteJson();
    }
    /// <summary>
    /// Json信息类
    /// </summary>
    public class JsonInfo
    {
        public string userName;
    }

    /// <summary>
    /// Json写入
    /// </summary>
    private void WriteJson()
    {
        //初始化
        JsonInfo jsonInfo = new JsonInfo();
        jsonInfo.userName = "小华";

        StreamWriter sw = new StreamWriter(filePath);
        string json = JsonMapper.ToJson(jsonInfo);

        //转码 
        Regex reg = new Regex(@"(?i)\\[uU]([0-9a-f]{4})");
        json = reg.Replace(json, delegate (Match m) { return ((char)Convert.ToInt32(m.Groups[1].Value, 16)).ToString(); });

        //写入信息
        sw.Write(json);
        sw.Dispose();
        sw.Close();
    }

在Unity中运行后效果如下：

二、Json反序列化（读取Json）

相对于写入，读取应用的更加广泛一些，其作用和我之前分享的Unity与Excel表格交互类似。
包含了Json文件，字段、类、数组的读取(在C盘新建.json文件，用记事本或VS打开)。

{
	"userName":"小华",

	"userData":
	{
		"name":"小明",
		"age":25
	},

	"studentInfo":
	[
		{"name":"贝贝","age":20,"description":"爱吃萝卜和青菜"},
		{"name":"晶晶","age":16,"description":"喜欢健身"},
		{"name":"妮妮","age":29,"description":"她单身"}
	]
}

    /// <summary>
    /// Json读取
    /// </summary>
    private void ReadJson()
    {
        //文件流 读取
        StreamReader sr = new StreamReader(filePath);

        //读取的Json字符串
        string readContent = sr.ReadToEnd();

        //反序列化操作
        JsonInfo json = JsonMapper.ToObject<JsonInfo>(readContent);
        Debug.Log("userName:" + json.userName);
        Debug.Log("UserData name:" + json.userData.name);
        Debug.Log("UserData age:" + json.userData.age);
        Debug.Log("StudentInfo 0 name:" + json.studentInfo[0].name);
        Debug.Log("StudentInfo 0 age:" + json.studentInfo[0].age);
        Debug.Log("StudentInfo 0 descrption:" + json.studentInfo[0].description);
    }

    /// <summary>
    /// Json信息类
    /// </summary>
    public class JsonInfo
    {
        public string userName;
        public UserData userData;
        public List<StudentInfo> studentInfo;
    }

    /// <summary>
    /// 测试 用户数据类
    /// </summary>
    public class UserData
    {
        public string name;
        public int age;
    }

    /// <summary>
    /// 测试 学生信息类
    /// </summary>
    public class StudentInfo
    {
        public string name;
        public int age;
        public string description;
    }

最终在Unityi中运行发现正常读取json文件

完整代码如下：

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

public class JsonTest : MonoBehaviour
{
    /// <summary>
    /// 文件路径
    /// </summary>
    private string filePath = "C:/david.json";

    private void Start()
    {
        //WriteJson();
        ReadJson();
    }

    /// <summary>
    /// Json写入
    /// </summary>
    private void WriteJson()
    {
        //初始化
        JsonInfo jsonInfo = new JsonInfo();
        jsonInfo.userName = "小华";

        StreamWriter sw = new StreamWriter(filePath);
        string json = JsonMapper.ToJson(jsonInfo);

        //转码 
        Regex reg = new Regex(@"(?i)\\[uU]([0-9a-f]{4})");
        json = reg.Replace(json, delegate (Match m) { return ((char)Convert.ToInt32(m.Groups[1].Value, 16)).ToString(); });

        //写入信息
        sw.Write(json);
        sw.Dispose();
        sw.Close();
    }

    /// <summary>
    /// Json读取
    /// </summary>
    private void ReadJson()
    {
        //文件流 读取
        StreamReader sr = new StreamReader(filePath);

        //读取的Json字符串
        string readContent = sr.ReadToEnd();

        //反序列化操作
        JsonInfo json = JsonMapper.ToObject<JsonInfo>(readContent);
        Debug.Log("userName:" + json.userName);
        Debug.Log("UserData name:" + json.userData.name);
        Debug.Log("UserData age:" + json.userData.age);
        Debug.Log("StudentInfo 0 name:" + json.studentInfo[0].name);
        Debug.Log("StudentInfo 0 age:" + json.studentInfo[0].age);
        Debug.Log("StudentInfo 0 descrption:" + json.studentInfo[0].description);
    }

    /// <summary>
    /// Json信息类
    /// </summary>
    public class JsonInfo
    {
        public string userName;
        public UserData userData;
        public List<StudentInfo> studentInfo;
    }

    /// <summary>
    /// 测试 用户数据类
    /// </summary>
    public class UserData
    {
        public string name;
        public int age;
    }

    /// <summary>
    /// 测试 学生信息类
    /// </summary>
    public class StudentInfo
    {
        public string name;
        public int age;
        public string description;
    }
}