Json----简单介绍

Json

先分享一个网站http://www.bejson.com/,这个是用来检测Json文件的错误的,Json文件一般不好查找错误.

看懂Json只需要四句话:

               对象表示为键值对

数据由逗号分隔

花括号保存对象

方括号保存数组

      

 这就是Json文件.不在过多介绍,重点不在这里

基础:Json到对象和对象到Json

需要用到的API:

 JsonMapper.ToJson();

JsonMapper.ToObject();

引用命名空间Using LitJson;

代码:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using LitJson;
public class JsonTest : MonoBehaviour {
    void Start()
    {
//对象到Json
        MyIphone myPhone = new MyIphone
        {
            appNum = 30,
            phoneState = true,
            appList = new List<string>() { "抖音", "BiliBili", "喜马拉雅听" }
        };
        string jsonIpone = JsonMapper.ToJson(myPhone);
      Debug.Log(jsonIpone);


//Json转到对象
        string myIphoneJson = "{'appNum':25,'phoneState':false,'appList':['WeChat','Sina','QQ']}";
        MyIphone myIPhone = JsonMapper.ToObject<MyIphone>(myIphoneJson);
        Debug.Log("手机应用数量:"+myIPhone.appNum+"-手机开机状态"+myIPhone.phoneState);
        for (int i = 0; i < myIPhone.appList.Count; i++)
        {
            Debug.Log(myIPhone.appList[i]);
        }
    }    
}
public class MyIphone
{
    public int appNum;
    public bool phoneState;
    public List<string> appList;
}

进阶使用的:

代码二:

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using LitJson;
using UnityEngine;
public class DataNode// 该class用于json的时候不能有构造函数
{
    public string CopyName;
    public string CopyPosition;
    public string CopyRotation;
}
public class DataCenter
{
    public List<DataNode> List;

   public DataCenter()
    {
        List =new List<DataNode>();
    }
}
public class JsonConvert : MonoBehaviour {
    private string _txtPath;
    private string _jsonPath;  
    void Start ()
    {
        _jsonPath = Application.streamingAssetsPath + "/CopyInfo.json";
        _txtPath = Application.streamingAssetsPath + "/CopyInfo.txt";
       // Json的解析是很快的 网络
        ReadTextToJson();
        ReadJsonFromJsonPath();
    }
    void ReadJsonFromJsonPath()
    {
      string jsondata =  File.ReadAllText(_jsonPath);
        List<DataNode> node = JsonMapper.ToObject<List<DataNode>>(jsondata);
        Debug.LogError(node.Count);
    }
    void ReadTextToJson()
    {
        DataCenter dc = new DataCenter();
        using (StreamReader reader = new StreamReader(_txtPath,Encoding.UTF8))
        {
            string tmpStr = string.Empty;
            while ( !string.IsNullOrEmpty(tmpStr = reader.ReadLine()))
            {
                string[] infos = tmpStr.Split('_');
                DataNode _node = new DataNode();
                _node = infos();
                dc.List.Add(_node);
            }
        }
        //数据读取完毕 开始写入json 传递的List<>
        string jsonData = JsonMapper.ToJson(dc.List);
        File.WriteAllText(_jsonPath,jsonData);
    }
}

代码三:

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;
using  Excel;
using OfficeOpenXml;
using Excel.Core;
using  System.Data;
using OfficeOpenXml.Style;
using UnityEditor;
using  LitJson;
class CopyInfo  //CopyInfo的构造
{
    public string     CopyName;
    public Vector3 CopyPosition;
    public Quaternion CopyRotation;
    public CopyInfo(string name, Vector3 postion, Vector3 rotation)
    {
        CopyName = name;
        CopyPosition = postion;
       CopyRotation = Quaternion.Euler(rotation);
    }
}
class JsonNode//JsonNode的构造
{
    public string StrName;
    public string StrPosition;
    public string StrRotation;   
    public JsonNode(string name,string pos, string rot)
    {
        StrName = name;
        StrPosition = pos;
        StrRotation = rot;
    }
}
class MyJsonData  //MyJsonData的构造
{
    public List<JsonNode> JsonDatalist;

    public MyJsonData()
    {
        JsonDatalist = new List<JsonNode>();
    }
}
public class CreateManager : MonoBehaviour
{
    private List<GameObject> _copyList;
    private List<CopyInfo>   _copyInfoList;
    private MyJsonData _jsonData;
    private string _excelPath;
    private string _path;
    //1. 读文件
    //2. 解析文件信息
    //3. 实例化
        //4. 实例化6个
    //4.1 在3s中销毁一个并且添加一个
    #region  读取存储在unity的streamingAssets路径中的json
    void ReadJsonByJsonPath()
    {
        string path = Application.streamingAssetsPath + "/CopyInfo.json";//路径
        string readInfo =File.ReadAllText(path);//文件读取过程
        Debug.LogWarning(readInfo);
       
        //类型是JsonNode
        List<JsonNode> JsonDatalist = new List<JsonNode>();//因为没有new对象!!!
        JsonDatalist = JsonMapper.ToObject<List<JsonNode>>(readInfo);//重要代码
        Debug.LogError(JsonDatalist.Count);
    }
  #endregion
    void Start()
    {
        _path = Application.streamingAssetsPath + "/CopyInfo.txt";
        _excelPath = Application.streamingAssetsPath + "/CopyInfo.xlsx";
        _copyInfoList = new List<CopyInfo>();
        _copyList = new List<GameObject>();
        _jsonData = new MyJsonData();
        WriteJsonByList();
        ReadJsonByJsonPath();
    }
    #region 
    private void WriteJsonByList( )
    {
        string jsonPath = Application.streamingAssetsPath
                          + "/CopyInfo.json";
        ////将一个list信息转换为json格式 
        ////定义一个class 这个class是什么不重要  必须包含一个列表      
         _jsonData = new MyJsonData();
        using (StreamReader reader  = new StreamReader(_path,Encoding.UTF8))
        {
            string tmp = string.Empty;
            while ( !  string.IsNullOrEmpty(tmp = reader.ReadLine()))
            {
                string[] infos = tmp.Split('_');
                _jsonData.JsonDatalist.Add(new JsonNode(infos[0], infos[1], infos[2]));
            }
        }
        //jsondata  数据填充完成
        string writeData = JsonMapper.ToJson(_jsonData);//
        File.WriteAllText(jsonPath,writeData);
    }
    #endregion
    private void WriteExcel(string path, List<CopyInfo> list)
    {
        FileInfo excelInfo = new FileInfo(path);
        if (excelInfo.Exists)
        {
            excelInfo.Delete();
            excelInfo = new FileInfo(path);
        }        
        //开始shiyong Excel 
        using (ExcelPackage package = new ExcelPackage(excelInfo))
        {
            ExcelWorksheet sheet = package.Workbook.Worksheets.Add("TestInfo"); // 添加了一个工作表
            sheet.Cells[1, 1].Value = "CopyName";
            sheet.Cells[1, 2].Value = "CopyPosition";
            sheet.Cells[1, 3].Value = "CopyRotation";
            for (int i = 0; i < _copyInfoList.Count; i++)
            {
                sheet.Cells[2 + i, 1 ].Value = _copyInfoList[i].CopyName;
                sheet.Cells[2 + i, 2 ].Value = _copyInfoList[i].CopyPosition;
                sheet.Cells[2 + i, 3 ].Value = _copyInfoList[i].CopyRotation;
            }
            sheet.Cells.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
            sheet.Cells.Style.VerticalAlignment = ExcelVerticalAlignment.Center;
            sheet.Cells.Style.Font.Bold = true;
            sheet.Cells.Style.Font.Name = "宋体";
            sheet.Cells.Style.Font.Size = 28;
            sheet.Cells.AutoFitColumns(50, 150);
            package.Save();
        }
        AssetDatabase.Refresh();
    }
}