3、模板方法模式

一、模板方法模式，简单的说就是在一个上层的抽象类中，定义了一些操作的抽象方法，有一个总体的方法组织了怎么去调用这个操作方法，而操作方法的具体实现由子类去实现，达到抽取公共部分放在父类模板中，子实现各自己不对的部分

public abstract class AbstractTemplate
{protected virtual void Init(){Console.WriteLine("init data");}protected abstract void Step1();protected abstract void Step2();protected abstract void Step3();protected virtual void Save(){Console.WriteLine("Save Data");}public void Run(){Init();Step1();Step2();Step3();Save();}
}public class DoA : AbstractTemplate
{protected override void Init(){Console.WriteLine("DoA init data");base.Init();}protected override void Step1(){Console.WriteLine("DoA Step1");}protected override void Step2(){Console.WriteLine("DoA Step2");}protected override void Step3(){Console.WriteLine("DoA Step3");}
}public class DoB : AbstractTemplate
{protected override void Step1(){Console.WriteLine("DoB Step1");}protected override void Step2(){Console.WriteLine("DoB Step2");}protected override void Step3(){Console.WriteLine("DoB Step3");}protected override void Save(){Console.WriteLine("DoB Save data");}
}