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标题: [unity脚本]Unity3d的json解析研究 [打印本页]

作者: 铁锹 时间: 2013-1-3 15:41
标题: [unity脚本]Unity3d的json解析研究
本文分享[unity脚本]Unity3d的json解析研究：unity3d使用json，原作者：unity3d圣典test_2。作者写了4个方法：ReadJson(),ReadJsonFromTXT();WriteJsonAndPrint(),WriteJsonToFile(string,string).
   想使用JSon需要dll动态链接库
还有一些相应的命名空间using UnityEngine;
using System.Collections;
using LitJson;
using System.IO;
#if UNITY_EDITOR
using UnityEditor;
#endif
首先你需要2个字符串，一个为路径，一个文txt文件。
我的写法如下：
public TextAsset txt;
public string filePath;
public string fileName;
// Use this for initialization
void Start () {
      filePath = Application.dataPath + "/TextFile";
      fileName = filePath + "/File.txt";
}

   1. //读json数据
void ReadJson()
{
      //注意json格式。我的只能在一行写入啊，要不就报错，懂的大牛，不吝赐教啊，这是为什么呢？
      string str = "{'name':'taotao','id':10,'items':[{'itemid':1001,'itemname':'dtao'},{'itemid':1002,'itemname':'test_2'}]}";
      //这里是json解析了
      JsonData jd = JsonMapper.ToObject(str);
      Debug.Log("name=" + jd["name"]);
      Debug.Log("id=" + jd["id"]);
      JsonData jdItems = jd["items"];
      //注意这里不能用枚举foreach，否则会报错的，看到网上
      //有的朋友用枚举，但是我测试过，会报错，我也不太清楚。
      //大家注意一下就好了
      for (int i = 0; i < jdItems.Count; i++)
      {
         Debug.Log("itemid=" + jdItems["itemid"]);
         Debug.Log("itemname=" + jdItems["itemname"]);
      }
      Debug.Log("items is or not array,it's " + jdItems.IsArray);
}
2.  //从TXT文本里都json
void ReadJsonFromTXT()
{
      //解析json
      JsonData jd = JsonMapper.ToObject(txt.text);
      Debug.Log("hp:" + jd["hp"]);
      Debug.Log("mp:" + jd["mp"]);
      JsonData weapon = jd["weapon"];
      //打印一下数组
      for (int i = 0; i < weapon.Count; i++)
      {
         Debug.Log("name="+weapon["name"]);
         Debug.Log("color="+weapon["color"]);
         Debug.Log("durability="+weapon["durability"]);
      }
}
3. //写json数据并且打印他
void WriteJsonAndPrint()
{
      System.Text.StringBuilder strB = new System.Text.StringBuilder();
      JsonWriter jsWrite = new JsonWriter(strB);
      jsWrite.WriteObjectStart();
      jsWrite.WritePropertyName("Name");
      jsWrite.Write("taotao");
      jsWrite.WritePropertyName("Age");
      jsWrite.Write(25);
      jsWrite.WritePropertyName("MM");
      jsWrite.WriteArrayStart();
      jsWrite.WriteObjectStart();
      jsWrite.WritePropertyName("name");
      jsWrite.Write("xiaomei");
      jsWrite.WritePropertyName("age");
      jsWrite.Write("17");
      jsWrite.WriteObjectEnd();
      jsWrite.WriteObjectStart();
      jsWrite.WritePropertyName("name");
      jsWrite.Write("xiaoli");
      jsWrite.WritePropertyName("age");
      jsWrite.Write("18");
      jsWrite.WriteObjectEnd();
      jsWrite.WriteArrayEnd();
      jsWrite.WriteObjectEnd();
      Debug.Log(strB);
      JsonData jd = JsonMapper.ToObject(strB.ToString());
      Debug.Log("name=" + jd["Name"]);
      Debug.Log("age=" + jd["Age"]);
      JsonData jdItems = jd["MM"];
      for (int i = 0; i < jdItems.Count; i++)
      {
         Debug.Log("MM name=" + jdItems["name"]);
         Debug.Log("MM age=" + jdItems["age"]);
      }

}
4. //把json数据写到文件里
void WriteJsonToFile(string path,string fileName)
{
      System.Text.StringBuilder strB = new System.Text.StringBuilder();
      JsonWriter jsWrite = new JsonWriter(strB);
      jsWrite.WriteObjectStart();
      jsWrite.WritePropertyName("Name");
      jsWrite.Write("taotao");
      jsWrite.WritePropertyName("Age");
      jsWrite.Write(25);
      jsWrite.WritePropertyName("MM");
      jsWrite.WriteArrayStart();
      jsWrite.WriteObjectStart();
      jsWrite.WritePropertyName("name");
      jsWrite.Write("xiaomei");
      jsWrite.WritePropertyName("age");
      jsWrite.Write("17");
      jsWrite.WriteObjectEnd();
      jsWrite.WriteObjectStart();
      jsWrite.WritePropertyName("name");
      jsWrite.Write("xiaoli");
      jsWrite.WritePropertyName("age");
      jsWrite.Write("18");
      jsWrite.WriteObjectEnd();
      jsWrite.WriteArrayEnd();
      jsWrite.WriteObjectEnd();
      Debug.Log(strB);
      //创建文件目录
      DirectoryInfo dir = new DirectoryInfo(path);
      if (dir.Exists)
      {
         Debug.Log("This file is already exists");
      }
      else
      {
         Directory.CreateDirectory(path);
         Debug.Log("CreateFile");
#if UNITY_EDITOR
         AssetDatabase.Refresh();
#endif
      }
      //把json数据写到txt里
      StreamWriter sw;
      if (File.Exists(fileName))
      {
         //如果文件存在，那么就向文件继续附加（为了下次写内容不会覆盖上次的内容)
         sw = File.AppendText(fileName);
         Debug.Log("appendText");
      }
      else
      {
         //如果文件不存在则创建文件
         sw = File.CreateText(fileName);
         Debug.Log("createText");
      }
      sw.WriteLine(strB);
      sw.Close();
#if UNITY_EDITOR
      AssetDatabase.Refresh();
#endif

}.
为了大家可以更形象理解一下。我用GUI了
  void OnGUI()
{
      GUILayout.BeginArea(new Rect(0, 0, Screen.width, Screen.height));
      GUILayout.BeginHorizontal();
      GUILayout.FlexibleSpace();
      GUILayout.BeginVertical();
      GUILayout.FlexibleSpace();
      if (GUILayout.Button("ReadJson"))
      {
         ReadJson();
      }
      if (GUILayout.Button("ReadJsonFromTXT"))
      {
         ReadJsonFromTXT();
      }
      if (GUILayout.Button("WriteJsonAndPrint"))
      {
         WriteJsonAndPrint();
      }
      if (GUILayout.Button("WriteJsonToFile"))
      {
         WriteJsonToFile(filePath,fileName);
      }
      GUILayout.FlexibleSpace();
      GUILayout.EndVertical();
      GUILayout.FlexibleSpace();
      GUILayout.EndHorizontal();
      GUILayout.EndArea();
}
——————————————————————————    首先，工程如下：