Unity数据的存储——XML（一）

XML：

优点：格式统一，符合标准，容易与其他系统进行远程交互，数据共享比较方便

缺点：XML文件庞大，文件格式复杂，传输占带宽；服务器端与客户端解析XML花费较多的资源和时间

Json：

优点：数据格式比较简单，易于读写，格式都是压缩的，占用带宽较小，支持多种语言

缺点：可读性较XML略差

总结：

两者可以相互转换，功能都是相差无几，但是json比xml较好，但是xml更加通用

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

public class ReadXml:MonoBehaviour  {
    
	void Start () {
        CreateXML();
        //AddXML();
        //ReadXML();
        //UpdateXML();
        //DeleteXML();

    }
    //生成XMl文件
    void CreateXML()
    {
        XmlDocument doc = new XmlDocument();
        XmlElement root = doc.CreateElement("team");
        //对这个结构单元添加属性
        root.SetAttribute("name", "Person");
        XmlElement student = doc.CreateElement("student");

        XmlElement name = doc.CreateElement("name");
        name.InnerText = "xiaoming";
        XmlElement age = doc.CreateElement("name");
        age.InnerText = "16";
        XmlElement id = doc.CreateElement("name");
        id.InnerText = "11111111";

        student.AppendChild(name);
        student.AppendChild(age);
        student.AppendChild(id);

        root.AppendChild(student);

        doc.AppendChild(root);
        doc.Save(Application.dataPath + @"/testXML.xml");
        Debug.Log("创建成功");

    }
    //读取XML
    void ReadXML()
    {
        XmlDocument doc = new XmlDocument();
        string xmlfile = Application.dataPath + @"/XML.xml";
        doc.Load(xmlfile);
        //获取根节点XmlElement表示节点（元素）
        XmlNode team = doc.SelectSingleNode("team");
        XmlNodeList personsEle = team.ChildNodes;

        foreach (XmlElement personEle in personsEle)
        {
            Debug.Log(personEle.GetAttribute("student"));

            XmlElement nameEle = personEle.ChildNodes[0] as XmlElement;
            XmlElement ageEle = personEle.ChildNodes[1] as XmlElement;
            XmlElement idEle = personEle.ChildNodes[2] as XmlElement;

            Debug.Log(nameEle.InnerText + "," + ageEle.InnerText + "," + idEle.InnerText);
        }
    }
    //添加XML
    void AddXML()
    {
        XmlDocument doc = new XmlDocument();
        doc.Load(Application.dataPath + @"/XML.xml");

        XmlNode team = doc.SelectSingleNode("team");
        XmlElement newStudent = doc.CreateElement("student");

        XmlElement name = doc.CreateElement("name");
        name.InnerText = "hexin";
        XmlElement age = doc.CreateElement("age");
        age.InnerText = "24";
        XmlElement id = doc.CreateElement("id");
        id.InnerText = "20151208";

        //向新的student中添加属性
        newStudent.AppendChild(name);
        newStudent.AppendChild(age);
        newStudent.AppendChild(id);

        //将student添加到team中
        team.AppendChild(newStudent);

        doc.Save(Application.dataPath+@"/XMLAdd.xml");
    }
    //更新XML
    void UpdateXML()
    {
        XmlDocument doc = new XmlDocument();
        doc.Load(Application.dataPath + @"/XMLAdd.xml");

        XmlNode team = doc.SelectSingleNode("team");
        XmlNodeList personsEle = team.ChildNodes;

        foreach (XmlElement personEle in personsEle)
        {
            XmlNode name = personEle.SelectSingleNode("name");
            if (name.InnerText.Equals("hexin"))
            {
                Debug.Log("更改数据");
                name.InnerText = "HEXIN";
            }
        }
        doc.Save(Application.dataPath + @"/XMLUpdate.xml");
    }
    //删除XML节点
    void DeleteXML()
    {
        XmlDocument doc = new XmlDocument();
        doc.Load(Application.dataPath + @"/XML.xml");

        XmlNode team = doc.SelectSingleNode("team");
        XmlNodeList personsEle = team.ChildNodes;

        foreach (XmlElement personEle in personsEle)
        {
            XmlNode name = personEle.SelectSingleNode("name");
            if (name.InnerText.Equals("Lili"))
            {
                Debug.Log("删除数据");
                team.RemoveChild(personEle);
            }
        }
        doc.Save(Application.dataPath + @"/XMLDelete.xml");
    }

}