(转载)Unity3D研究院之使用 C#合成解析XML与JSON（四十一）

XML与JSON在开发中非常重要， 其实核心就是处理字符串。一个是XML的字符串一个是JSON的字符串，尤其是在处理网络请求的时候，肯定是要用的。另外现在JSON非常的流行，我写了一个简单的例子融合了XML与JSON的合成与解析，希望大家喜欢！

首先注意头文件，LitJson是处理JSON的第三方库，最后我会给出下载地址。

 

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

1、生成XML

 

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public void createXml() {                //xml保存的路径，这里放在Assets路径 注意路径。 string filepath = Application.dataPath + @"/my.xml";                //继续判断当前路径下是否有该文件 if(!File.Exists (filepath)) {                          //创建XML文档实例 XmlDocument xmlDoc = new XmlDocument();                          //创建root节点，也就是最上一层节点 XmlElement root = xmlDoc.CreateElement("transforms");                           //继续创建下一层节点 XmlElement elmNew = xmlDoc.CreateElement("rotation");                         //设置节点的两个属性 ID 和 NAME      elmNew.SetAttribute("id","0");      elmNew.SetAttribute("name","momo");        //继续创建下一层节点               XmlElement rotation_X = xmlDoc.CreateElement("x");                      //设置节点中的数值                      rotation_X.InnerText = "0";                     XmlElement rotation_Y = xmlDoc.CreateElement("y");                     rotation_Y.InnerText = "1";                     XmlElement rotation_Z = xmlDoc.CreateElement("z");                      rotation_Z.InnerText = "2";                     //这里在添加一个节点属性，用来区分。。       rotation_Z.SetAttribute("id","1");                //把节点一层一层的添加至XMLDoc中 ，请仔细看它们之间的先后顺序，这将是生成XML文件的顺序              elmNew.AppendChild(rotation_X);              elmNew.AppendChild(rotation_Y);              elmNew.AppendChild(rotation_Z);      root.AppendChild(elmNew);              xmlDoc.AppendChild(root);              //把XML文件保存至本地              xmlDoc.Save(filepath); Debug.Log("createXml OK!"); } }

运行结果

 

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<transforms>   <rotation id="0" name="momo">     <x>0</x>     <y>1</y>     <z id="1">2</z>   </rotation> </transforms>

2.更新XML文件

以其中某个节点名称做条件，当查询到时更新该节点

 

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public void UpdateXml() { string filepath = Application.dataPath + @"/my.xml"; if(File.Exists (filepath)) { XmlDocument xmlDoc = new XmlDocument();                          //根据路径将XML读取出来 xmlDoc.Load(filepath);                          //得到transforms下的所有子节点 XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes;                          //遍历所有子节点 foreach(XmlElement xe in nodeList) {                                 //拿到节点中属性ID =0的节点 if(xe.GetAttribute("id")=="0") {                                         //更新节点属性 xe.SetAttribute("id","1000");                                         //继续遍历 foreach(XmlElement x1 in xe.ChildNodes) { if(x1.Name=="z") {                                                         //这里是修改节点名称对应的数值，而上面的拿到节点连带的属性。。。 x1.InnerText="update00000"; }   } break; } } xmlDoc.Save(filepath); Debug.Log("UpdateXml OK!"); }   }

运行结果

 

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<transforms>   <rotation id="1000" name="momo">     <x>0</x>     <y>1</y>     <z id="1">update00000</z>   </rotation> </transforms>

3.添加XML

重复的地方我就不解释拉。

 

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public void AddXml() { string filepath = Application.dataPath + @"/my.xml"; if(File.Exists (filepath)) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(filepath); XmlNode root = xmlDoc.SelectSingleNode("transforms"); XmlElement elmNew = xmlDoc.CreateElement("rotation"); elmNew.SetAttribute("id","1");     elmNew.SetAttribute("name","yusong");            XmlElement rotation_X = xmlDoc.CreateElement("x");              rotation_X.InnerText = "0"; rotation_X.SetAttribute("id","1");              XmlElement rotation_Y = xmlDoc.CreateElement("y");              rotation_Y.InnerText = "1";              XmlElement rotation_Z = xmlDoc.CreateElement("z");              rotation_Z.InnerText = "2";                elmNew.AppendChild(rotation_X);              elmNew.AppendChild(rotation_Y);              elmNew.AppendChild(rotation_Z); root.AppendChild(elmNew);              xmlDoc.AppendChild(root);              xmlDoc.Save(filepath); Debug.Log("AddXml OK!"); } }

运行结果

 

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<transforms>   <rotation id="1000" name="momo">     <x>0</x>     <y>1</y>     <z id="1">update00000</z>   </rotation>   <rotation id="1" name="yusong">     <x id="1">0</x>     <y>1</y>     <z>2</z>   </rotation> </transforms>

4.删除XML

 

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public void deleteXml() { string filepath = Application.dataPath + @"/my.xml"; if(File.Exists (filepath)) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(filepath); XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes; foreach(XmlElement xe in nodeList) { if(xe.GetAttribute("id")=="1") { xe.RemoveAttribute("id"); }   foreach(XmlElement x1 in xe.ChildNodes) { if(x1.Name == "z") { x1.RemoveAll();   } } } xmlDoc.Save(filepath); Debug.Log("deleteXml OK!"); }   }

运行结果

 

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<transforms>   <rotation id="1000" name="momo">     <x>0</x>     <y>1</y>     <z>     </z>   </rotation>   <rotation name="yusong">     <x id="1">0</x>     <y>1</y>     <z>     </z>   </rotation> </transforms>

4.解析与输出上面的XML

 

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public void showXml() { string filepath = Application.dataPath + @"/my.xml"; if(File.Exists (filepath)) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(filepath); XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes; //遍历每一个节点，拿节点的属性以及节点的内容 foreach(XmlElement xe in nodeList) { Debug.Log("Attribute :" + xe.GetAttribute("name")); Debug.Log("NAME :" + xe.Name); foreach(XmlElement x1 in xe.ChildNodes) { if(x1.Name == "y") { Debug.Log("VALUE :" + x1.InnerText);   } } } Debug.Log("all = " + xmlDoc.OuterXml);   } }

运行结果（点击图片最大化）

接着是处理JSON

5.解析JSON字符串显示字典键值

 

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public void ResolveJson() {                  //定义的JSON字符串，注意JSON的格式 string str = @"             {                 ""Name""     : ""yusong"",                 ""Age""      : 26,                 ""Birthday"" : ""1986-11-21"", ""Thumbnail"":[ {            ""Url"":    ""http://xuanyusong.com"",            ""Height"": 256,            ""Width"":  ""200"" }, {            ""Url"":    ""http://baidu.com"",            ""Height"": 1024,            ""Width"":  ""500"" }   ]             }"; //这里是解析，包括整形与字符串 JsonData jd = JsonMapper.ToObject(str); Debug.Log("name = " + (string)jd["Name"]); Debug.Log("Age = " + (int)jd["Age"]); Debug.Log("Birthday = " + (string)jd["Birthday"]); JsonData jdItems = jd["Thumbnail"];   for (int i = 0; i < jdItems.Count; i++) { Debug.Log("URL = " + jdItems[i]["Url"]); Debug.Log("Height = " + (int)jdItems[i]["Height"]);          Debug.Log("Width = " + jdItems[i]["Width"]); } }

运行结果

6.合成JSON字符串，先合成 然后在输出。

 

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public void MergerJson() { StringBuilder sb = new StringBuilder ();         JsonWriter writer = new JsonWriter (sb);           writer.WriteObjectStart ();   writer.WritePropertyName ("Name");         writer.Write ("yusong");   writer.WritePropertyName ("Age");         writer.Write (26);   writer.WritePropertyName ("Girl");   writer.WriteArrayStart ();   writer.WriteObjectStart(); writer.WritePropertyName("name");         writer.Write("ruoruo");         writer.WritePropertyName("age");         writer.Write(24); writer.WriteObjectEnd ();   writer.WriteObjectStart(); writer.WritePropertyName("name");         writer.Write("momo");         writer.WritePropertyName("age");         writer.Write(26); writer.WriteObjectEnd ();   writer.WriteArrayEnd();   writer.WriteObjectEnd (); Debug.Log(sb.ToString ());   JsonData jd = JsonMapper.ToObject(sb.ToString ()); Debug.Log("name = " + (string)jd["Name"]); Debug.Log("Age = " + (int)jd["Age"]); JsonData jdItems = jd["Girl"]; for (int i = 0; i < jdItems.Count; i++) { Debug.Log("Girl name = " + jdItems[i]["name"]); Debug.Log("Girl age = " + (int)jdItems[i]["age"]); } }

运行结果