利用反射构造工厂

青旅半醒 2022-06-05 09:25 178阅读 0赞

using System;
    using System.Reflection;
    
    namespace Reflex.factory
    {
        class Program
        {
            static void Main(string[] args)
            {
                //普通工厂
                Ikess fk1 = FactoryManage.fnGetIkess("kess");
                fk1.write();
    
                Ikess fk2 = FactoryManage.fnGetIkess("kess2");
                fk2.write();
    
                Ikess fk3 = FactoryManage.fnGetIkess("kess3");
                fk3.write();
    
                //反射工厂
                string mNamespace = "Reflex.factory";
                Ikess k1 = ReflexFactoryManage.fnGetIkess(mNamespace,"kess");
                k1.write();
    
                Ikess k2 = ReflexFactoryManage.fnGetIkess(mNamespace, "kess2");
                k2.write();
    
                Ikess k3 = ReflexFactoryManage.fnGetIkess(mNamespace, "kess3");
                k3.write();
    
                ReflexFactoryManage fy = new ReflexFactoryManage(mNamespace);
                Ikess k4 = fy.fnGetIkess("kess4");
                k4.write();
    
                Console.ReadKey();
            }
        }
    
        /// <summary>
        /// 普通工厂，需要修改
        /// </summary>
        internal class FactoryManage
        {
            internal static Ikess fnGetIkess(string mClassName)
            {
                ///每次添加新类都要修改此处
                switch (mClassName)
                {
                    case "kess":
                        return new kess();
                    case "kess2":
                        return new kess2();
                    case "kess3":
                        return new kess3();
                    case "kess4":
                        return new kess4();
                    default:
                        throw new Exception("不存在此工厂");
                }
            }
        }
    
    
        /// <summary>
        /// 反射工厂，不需要修改
        /// </summary>
        internal class ReflexFactoryManage
        {
            string mNamespace = "";
            internal ReflexFactoryManage(string mNamespace)
            {
                this.mNamespace = mNamespace;
            }
    
            internal Ikess fnGetIkess(string mClassName)
            {
                return Assembly.Load(mNamespace).CreateInstance(mNamespace + "." + mClassName) as Ikess;
            }
    
            internal static Ikess fnGetIkess(string mNamespace, string mClassName)
            {
                return Assembly.Load(mNamespace).CreateInstance(mNamespace + "." + mClassName) as Ikess;
            }
    
        }
    
    
        internal interface Ikess
        {
            void write();
        }
    
        internal class kess : Ikess
        {
            public void write()
            {
                Console.WriteLine("is kess");
            }
        }
    
        internal class kess2 : Ikess
        {
            public void write()
            {
                Console.WriteLine("is kess2");
            }
        }
    
        internal class kess3 : Ikess
        {
            public void write()
            {
                Console.WriteLine("is kess3");
            }
        }
        internal class kess4 : Ikess
        {
            public void write()
            {
                Console.WriteLine("is kess4");
            }
        }
    }