[腳本]Unity3d之json解析研究

許多潤澤 2013-01-17

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[腳本]Unity3d之json解析研究

json是好東西啊！JSON(JavaScript Object Notation) 是一種輕量級(jí)的數(shù)據(jù)交換格式
      JSON簡單易用，我要好好研究一下，和大家共享一下.
      想了解更詳細(xì)的數(shù)據(jù)可以參考一下百科：http://baike.baidu.com/view/136475.htm
      好了，我們步入正題：unity3d使用json
      我寫了4個(gè)方法：ReadJson(),ReadJsonFromTXT();WriteJsonAndPrint(),WriteJsonToFile(string,string).
     想使用JSon需要dll動(dòng)態(tài)鏈接庫
還有一些相應(yīng)的命名空間using UnityEngine;
using System.Collections;
using LitJson;
using System.IO;
#if UNITY_EDITOR
using UnityEditor;
#endif
首先你需要2個(gè)字符串，一個(gè)為路徑，一個(gè)文txt文件。
我的寫法如下：
    public TextAsset txt;
    public string filePath;
    public string fileName;
// Use this for initialization
void Start () {
        filePath = Application.dataPath + "/TextFile";
        fileName = filePath + "/File.txt";
}

     1. //讀json數(shù)據(jù)
    void ReadJson()
    {
        //注意json格式。我的只能在一行寫入啊，要不就報(bào)錯(cuò)，懂的大牛，不吝賜教啊，這是為什么呢？
        string str = "{'name':'taotao','id':10,'items':[{'itemid':1001,'itemname':'dtao'},{'itemid':1002,'itemname':'test_2'}]}";
        //這里是json解析了
        JsonData jd = JsonMapper.ToObject(str);
        Debug.Log("name=" + jd["name"]);
        Debug.Log("id=" + jd["id"]);
        JsonData jdItems = jd["items"];
        //注意這里不能用枚舉foreach，否則會(huì)報(bào)錯(cuò)的，看到網(wǎng)上
        //有的朋友用枚舉，但是我測試過，會(huì)報(bào)錯(cuò)，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.  //從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"];
        //打印一下數(shù)組
        for (int i = 0; i < weapon.Count; i++)
        {
            Debug.Log("name="+weapon["name"]);
            Debug.Log("color="+weapon["color"]);
            Debug.Log("durability="+weapon["durability"]);
        }
    }
3.   //寫json數(shù)據(jù)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數(shù)據(jù)寫到文件里
    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);
        //創(chuàng)建文件目錄
        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數(shù)據(jù)寫到txt里
        StreamWriter sw;
        if (File.Exists(fileName))
        {
            //如果文件存在，那么就向文件繼續(xù)附加（為了下次寫內(nèi)容不會(huì)覆蓋上次的內(nèi)容)
            sw = File.AppendText(fileName);
            Debug.Log("appendText");
        }
        else
        {
            //如果文件不存在則創(chuàng)建文件
            sw = File.CreateText(fileName);
            Debug.Log("createText");
        }
        sw.WriteLine(strB);
        sw.Close();
#if UNITY_EDITOR
        AssetDatabase.Refresh();
#endif

    }.
為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();
    }
      首先我的工程如下：

接著我們把TestJson腳本賦給攝像機(jī)

我們點(diǎn)擊run一下

你便會(huì)在游戲面板里看到有4個(gè)按鈕了

我們點(diǎn)擊ReadJson按鈕一下

在相印的控制臺(tái)里打印如紅色框內(nèi)

我們clear一下控制臺(tái)，clear玩了如下所示，紅色區(qū)域里什么也沒有了

我們點(diǎn)擊一下ReadJsonFromTXT按鈕，點(diǎn)完后發(fā)現(xiàn)打印的結(jié)果和txt里的內(nèi)容一模一樣，呵呵成功了

我們再clear一下控制臺(tái)，之后點(diǎn)擊一下WriteJsonAndPrint按鈕

打印結(jié)果如下：

我們接著clear一下控制臺(tái)，點(diǎn)擊一下WriteJsonToFile按鈕

我們發(fā)現(xiàn)在工程面板里多出來了一個(gè)文件夾和文本文件，而且控制臺(tái)打印的結(jié)果和文本里的內(nèi)容一樣喲！o(∩_∩)o

好了，這節(jié)講完了。不知道大家清楚沒，歡迎留言。一起學(xué)習(xí)，一起進(jìn)步。

請(qǐng)保證工程里面已經(jīng)加入了LitJson.dll

服務(wù)器上JSON的內(nèi)容

[{"people":[
{"name":"fff","pass":"123456","age":"1", "info":{"sex":"man"}},
{"name":"god","pass":"123456","age":"1","info":{"sex":"woman"}},
{"name":"kwok","pass":"123456","age":"1","info":{"sex":"man"}},
{"name":"tom","pass":"123456","age":"1","info":{"sex":"woman"}}
]}
]

復(fù)制代碼

LoadControl_c代碼:

using UnityEngine;
using System.Collections;
using LitJson;
public class LoadControl_c:MonoBehaviour
{
private GameObject plane;
public string url = "http://127.0.0.1/test2.txt";
// Use this for initialization
void Start()
{
StartCoroutine(LoadTextFromUrl());
//StartCoroutine(DoSomething());
//Book book = new Book("Android dep");
//InvokeRepeating("LaunchProjectile", 1, 5);
}
IEnumerator DoSomething()
{
yield return new WaitForSeconds(3);
}
IEnumerator LoadTextFromUrl()
{
if (url.Length > 0)
{
WWW www = new WWW(url);
yield return www;
//string data = www.data.ToString().Substring(1);
string data = www.text.ToString().Substring(1);
// 下面是關(guān)鍵
print(data);
LitJson.JsonData jarr = LitJson.JsonMapper.ToObject(www.text);
if(jarr.IsArray)
{
for (int i = 0; i < jarr.Count; i++)
{
Debug.Log(jarr[i]["people"]);
JsonData jd = jarr[i]["people"];
for(int j = 0; j < jd.Count; j++)
{
Debug.Log(jd[j]["name"]);
}
}
}
}
}
}

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