C# 设计模式之 职责链模式

每个职责类包含职责类对象，如果自己处理不了，交给职责类处理

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace DesignPytternDemo{    public abstract class DataTypeHandler    {        protected DataTypeHandler _handler;        public void SetHandler(DataTypeHandler handler)        {            this._handler = handler;        }        public abstract void Handle(object data);    }    public class IntHandler : DataTypeHandler    {        public override void Handle(object data)        {            if (data is int)            {                Console.WriteLine("int handler handle it!");            }            else            {                if (this._handler != null)                {                    this._handler.Handle(data);                }            }        }    }    public class BoolHandler : DataTypeHandler    {        public override void Handle(object data)        {            if (data is bool)            {                Console.WriteLine("BoolHandler handler handle it!");            }            else            {                if (this._handler != null)                {                    this._handler.Handle(data);                }            }        }    }    public class DoubleHandler : DataTypeHandler    {        public override void Handle(object data)        {            if (data is double)            {                Console.WriteLine("double handler handle it!");            }            else            {                if (this._handler != null)                {                    this._handler.Handle(data);                }            }        }    }}            DataTypeHandler bh1 = new IntHandler();            DataTypeHandler bh2 = new BoolHandler();            DataTypeHandler bh3 = new DoubleHandler();            bh1.SetHandler(bh2);            bh2.SetHandler(bh3);            int a = 1;            bool b = true;            double c = 1.2;            bh1.Handle(a);            bh1.Handle(b);            bh1.Handle(c);