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。
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.IO;
using System.Text;
using LitJson;
1、生成XML
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 NAMEelmNew.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
<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
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!");}}
<transforms><rotation id="1000" name="momo"><x>0</x><y>1</y><z id="1">update00000</z></rotation>
</transforms>
运行结果↑
3.添加XML
重复的地方我就不解释拉。
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
<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
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
<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
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
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。
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
http://www.xuanyusong.com/archives/1901
转载 雨松MOMO 2012年11月29日 于 雨松MOMO程序研究院 发表