对象,对象集合的简单Xml序列化与反序列化

本文描述如何使用CLR中的StringWriter,XmlSerializer将对象, 对象集合序列化为Xml格式的字符串, 同时描述如何进行反序列化.

C#版本: C# 3.0
开发环境: VS 2008

主要方法:

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  System.IO;
using  System.Xml;
using  System.Xml.Serialization;

namespace  ConsoleApplication2
{
    public class SimpleSerializer
    {
        /**//// <summary>
        /// 序列化对象
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="t">对象</param>
        /// <returns></returns>
        public static string Serialize<T>(T t) {
            using (StringWriter sw = new StringWriter()) {
                XmlSerializer xz = new XmlSerializer(t.GetType());
                xz.Serialize(sw, t);
                return sw.ToString();
            }
        }
        
        /**//// <summary>
        /// 反序列化为对象
        /// </summary>
        /// <param name="type">对象类型</param>
        /// <param name="s">对象序列化后的Xml字符串</param>
        /// <returns></returns>
        public static object Deserialize(Type type, string s) {
            using(StringReader sr = new StringReader(s)) {
                XmlSerializer xz = new XmlSerializer(type);
                return xz.Deserialize(sr);
            }
        }
    }
}

定义一个用于测试的实体类: UserInfo

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  System.Xml.Serialization;

namespace  ConsoleApplication2
{
    [Serializable]
    public class UserInfo
    {
        private int m_UserId;

        [XmlElement("userId")]
        public int UserId
        {
            get { return m_UserId; }
            set { m_UserId = value; }
        }
        private string m_UserName;

        [XmlElement("userName")]
        public string UserName
        {
            get { return m_UserName; }
            set { m_UserName = value; }
        }
    }
}

编写测试子程序:

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;

namespace  ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            Program.TestOne();
            Console.WriteLine(string.Empty);

            Program.TestTwo();
            Console.WriteLine(string.Empty);

            Program.TestThree();
            Console.WriteLine(string.Empty);

            Program.TestFour();
        }
        public static void TestOne() {
            UserInfo info = new UserInfo() { UserId = 1, UserName = "Guozhijian" };
            Console.WriteLine(SimpleSerializer.Serialize<UserInfo>(info));
        }
        public static void TestTwo() {
            List<UserInfo> list = new List<UserInfo>();
            list.Add(new UserInfo() { UserId = 1, UserName = "Guozhijian" });
            list.Add(new UserInfo() { UserId = 2, UserName = "Zhenglanzhen" });
            Console.WriteLine(SimpleSerializer.Serialize<List<UserInfo>>(list));
        }
        public static void TestThree() {
            string s = SimpleSerializer.Serialize<UserInfo>(new UserInfo() { UserId = 1, UserName = "Guozhijian" });
            UserInfo info = SimpleSerializer.Deserialize(typeof(UserInfo), s) as UserInfo;
            Console.WriteLine(info.UserId.ToString() + ", " + info.UserName);
        }
        public static void TestFour() {
            List<UserInfo> list = new List<UserInfo>();
            list.Add(new UserInfo() { UserId = 1, UserName = "Guozhijian" });
            list.Add(new UserInfo() { UserId = 2, UserName = "Zhenglanzhen" });
            string s = SimpleSerializer.Serialize<List<UserInfo>>(list);
            List<UserInfo> newList = SimpleSerializer.Deserialize(typeof(List<UserInfo>), s) as List<UserInfo>;
            foreach (var info in newList) {
                Console.WriteLine(info.UserId.ToString() + ", " + info.UserName);
            }
        }
    }
}

输出结果为:

<?xml version="1.0" encoding="utf-16"?>
<UserInfo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http:
//www.w3.org/2001/XMLSchema">
  <userId>1</userId>
  <userName>Guozhijian</userName>
</UserInfo>

<?xml version="1.0" encoding="utf-16"?>
<ArrayOfUserInfo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd
="http://www.w3.org/2001/XMLSchema">
  <UserInfo>
    <userId>1</userId>
    <userName>Guozhijian</userName>
  </UserInfo>
  <UserInfo>
    <userId>2</userId>
    <userName>Zhenglanzhen</userName>
  </UserInfo>
</ArrayOfUserInfo>

1, Guozhijian

1, Guozhijian
2, Zhenglanzhen