Unity3D研究院之使用 C#合成解析XML与JSON
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; |
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using System.Collections; |
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using System.Collections.Generic; |
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using System.Xml; |
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using System.IO; |
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using System.Text; |
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using LitJson; |
1、生成XML
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public void createXml() |
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{ |
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//xml保存的路径，这里放在Assets路径 注意路径。 |
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string filepath = Application.dataPath + @"/my.xml"; |
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//继续判断当前路径下是否有该文件 |
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if(!File.Exists (filepath)) |
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{ |
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//创建XML文档实例 |
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XmlDocument xmlDoc = new XmlDocument(); |
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//创建root节点，也就是最上一层节点 |
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XmlElement root = xmlDoc.CreateElement("transforms"); |
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//继续创建下一层节点 |
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XmlElement elmNew = xmlDoc.CreateElement("rotation"); |
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//设置节点的两个属性 ID 和 NAME |
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elmNew.SetAttribute("id","0"); |
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elmNew.SetAttribute("name","momo"); |
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//继续创建下一层节点 |
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XmlElement rotation_X = xmlDoc.CreateElement("x"); |
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//设置节点中的数值 |
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rotation_X.InnerText = "0"; |
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XmlElement rotation_Y = xmlDoc.CreateElement("y"); |
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rotation_Y.InnerText = "1"; |
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XmlElement rotation_Z = xmlDoc.CreateElement("z"); |
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rotation_Z.InnerText = "2"; |
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//这里在添加一个节点属性，用来区分。。 |
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rotation_Z.SetAttribute("id","1"); |
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//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 |
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elmNew.AppendChild(rotation_X); |
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elmNew.AppendChild(rotation_Y); |
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elmNew.AppendChild(rotation_Z); |
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root.AppendChild(elmNew); |
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xmlDoc.AppendChild(root); |
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//把XML文件保存至本地 |
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xmlDoc.Save(filepath); |
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Debug.Log("createXml OK!"); |
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} |
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} |
运行结果
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<transforms> |
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<rotation id="0" name="momo"> |
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<x>0</x> |
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<y>1</y> |
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<z id="1">2</z> |
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</rotation> |
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</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() |
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{ |
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string filepath = Application.dataPath + @"/my.xml"; |
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if(File.Exists (filepath)) |
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{ |
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XmlDocument xmlDoc = new XmlDocument(); |
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//根据路径将XML读取出来 |
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xmlDoc.Load(filepath); |
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//得到transforms下的所有子节点 |
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XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes; |
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//遍历所有子节点 |
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foreach(XmlElement xe in nodeList) |
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{ |
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//拿到节点中属性ID =0的节点 |
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if(xe.GetAttribute("id")=="0") |
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{ |
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//更新节点属性 |
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xe.SetAttribute("id","1000"); |
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//继续遍历 |
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foreach(XmlElement x1 in xe.ChildNodes) |
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{ |
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if(x1.Name=="z") |
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{ |
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//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。。。 |
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x1.InnerText="update00000"; |
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} |
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} |
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break; |
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} |
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} |
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xmlDoc.Save(filepath); |
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Debug.Log("UpdateXml OK!"); |
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} |
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} |
运行结果
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<transforms> |
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<rotation id="1000" name="momo"> |
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<x>0</x> |
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<y>1</y> |
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<z id="1">update00000</z> |
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</rotation> |
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</transforms> |
3.添加XML
重复的地方我就不解释拉。
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public void AddXml() |
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{ |
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string filepath = Application.dataPath + @"/my.xml"; |
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if(File.Exists (filepath)) |
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{ |
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XmlDocument xmlDoc = new XmlDocument(); |
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xmlDoc.Load(filepath); |
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XmlNode root = xmlDoc.SelectSingleNode("transforms"); |
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XmlElement elmNew = xmlDoc.CreateElement("rotation"); |
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elmNew.SetAttribute("id","1"); |
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elmNew.SetAttribute("name","yusong"); |
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XmlElement rotation_X = xmlDoc.CreateElement("x"); |
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rotation_X.InnerText = "0"; |
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rotation_X.SetAttribute("id","1"); |
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XmlElement rotation_Y = xmlDoc.CreateElement("y"); |
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rotation_Y.InnerText = "1"; |
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XmlElement rotation_Z = xmlDoc.CreateElement("z"); |
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rotation_Z.InnerText = "2"; |
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elmNew.AppendChild(rotation_X); |
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elmNew.AppendChild(rotation_Y); |
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elmNew.AppendChild(rotation_Z); |
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root.AppendChild(elmNew); |
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xmlDoc.AppendChild(root); |
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xmlDoc.Save(filepath); |
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Debug.Log("AddXml OK!"); |
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} |
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} |
运行结果
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<transforms> |
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<rotation id="1000" name="momo"> |
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<x>0</x> |
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<y>1</y> |
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<z id="1">update00000</z> |
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</rotation> |
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<rotation id="1" name="yusong"> |
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<x id="1">0</x> |
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<y>1</y> |
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<z>2</z> |
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</rotation> |
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</transforms> |
4.删除XML
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public void deleteXml() |
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{ |
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string filepath = Application.dataPath + @"/my.xml"; |
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if(File.Exists (filepath)) |
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{ |
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XmlDocument xmlDoc = new XmlDocument(); |
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xmlDoc.Load(filepath); |
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XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes; |
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foreach(XmlElement xe in nodeList) |
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{ |
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if(xe.GetAttribute("id")=="1") |
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{ |
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xe.RemoveAttribute("id"); |
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} |
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foreach(XmlElement x1 in xe.ChildNodes) |
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{ |
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if(x1.Name == "z") |
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{ |
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x1.RemoveAll(); |
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} |
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} |
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} |
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xmlDoc.Save(filepath); |
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Debug.Log("deleteXml OK!"); |
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} |
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} |
运行结果
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<transforms> |
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<rotation id="1000" name="momo"> |
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<x>0</x> |
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<y>1</y> |
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<z> |
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</z> |
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</rotation> |
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<rotation name="yusong"> |
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<x id="1">0</x> |
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<y>1</y> |
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<z> |
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</z> |
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</rotation> |
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</transforms> |
4.解析与输出上面的XML
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public void showXml() |
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{ |
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string filepath = Application.dataPath + @"/my.xml"; |
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if(File.Exists (filepath)) |
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{ |
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XmlDocument xmlDoc = new XmlDocument(); |
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xmlDoc.Load(filepath); |
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XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes; |
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//遍历每一个节点，拿节点的属性以及节点的内容 |
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foreach(XmlElement xe in nodeList) |
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{ |
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Debug.Log("Attribute :" + xe.GetAttribute("name")); |
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Debug.Log("NAME :" + xe.Name); |
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foreach(XmlElement x1 in xe.ChildNodes) |
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{ |
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if(x1.Name == "y") |
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{ |
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Debug.Log("VALUE :" + x1.InnerText); |
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} |
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} |
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} |
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Debug.Log("all = " + xmlDoc.OuterXml); |
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} |
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} |
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() |
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{ |
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//定义的JSON字符串，注意JSON的格式 |
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string str = @" |
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{ |
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""Name"" : ""yusong"", |
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""Age"" : 26, |
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""Birthday"" : ""1986-11-21"", |
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""Thumbnail"":[ |
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{ |
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""Url"": ""http://xuanyusong.com"", |
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""Height"": 256, |
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""Width"": ""200"" |
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}, |
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{ |
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""Url"": ""http://baidu.com"", |
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""Height"": 1024, |
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""Width"": ""500"" |
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} |
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] |
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}"; |
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//这里是解析，包括整形与字符串 |
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JsonData jd = JsonMapper.ToObject(str); |
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Debug.Log("name = " + (string)jd["Name"]); |
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Debug.Log("Age = " + (int)jd["Age"]); |
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Debug.Log("Birthday = " + (string)jd["Birthday"]); |
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JsonData jdItems = jd["Thumbnail"]; |
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for (int i = 0; i < jdItems.Count; i++) |
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{ |
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Debug.Log("URL = " + jdItems[i]["Url"]); |
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Debug.Log("Height = " + (int)jdItems[i]["Height"]); |
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Debug.Log("Width = " + jdItems[i]["Width"]); |
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} |
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} |
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() |
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{ |
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StringBuilder sb = new StringBuilder (); |
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JsonWriter writer = new JsonWriter (sb); |
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writer.WriteObjectStart (); |
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writer.WritePropertyName ("Name"); |
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writer.Write ("yusong"); |
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writer.WritePropertyName ("Age"); |
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writer.Write (26); |
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writer.WritePropertyName ("Girl"); |
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writer.WriteArrayStart (); |
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writer.WriteObjectStart(); |
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writer.WritePropertyName("name"); |
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writer.Write("ruoruo"); |
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writer.WritePropertyName("age"); |
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writer.Write(24); |
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writer.WriteObjectEnd (); |
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writer.WriteObjectStart(); |
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writer.WritePropertyName("name"); |
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writer.Write("momo"); |
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writer.WritePropertyName("age"); |
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writer.Write(26); |
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writer.WriteObjectEnd (); |
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writer.WriteArrayEnd(); |
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writer.WriteObjectEnd (); |
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Debug.Log(sb.ToString ()); |
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JsonData jd = JsonMapper.ToObject(sb.ToString ()); |
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Debug.Log("name = " + (string)jd["Name"]); |
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Debug.Log("Age = " + (int)jd["Age"]); |
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JsonData jdItems = jd["Girl"]; |
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for (int i = 0; i < jdItems.Count; i++) |
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{ |
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Debug.Log("Girl name = " + jdItems[i]["name"]); |
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Debug.Log("Girl age = " + (int)jdItems[i]["age"]); |
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} |
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} |
运行结果
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