设计模式 建造者模式

先写一个建造者的抽象类

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

namespace BuildPattern
{
    abstract class PersonBuilder
    {
        protected Graphics g;
        protected Pen p;


        public PersonBuilder(Graphics g, Pen pen)
        {
            this.g = g;
            this.p = pen;
        }

        public abstract void BuildHead();
        public abstract void BuildBody();
        public abstract void BuildArmLeft();
        public abstract void BuildArmRight();
        public abstract void BuildLegLeft();
        public abstract void BuildLegRight();
    }


}

在写一个建造者的导演类

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

namespace BuildPattern
{
    class PersonDirector
    {
        private PersonBuilder pb;
        public PersonDirector(PersonBuilder pb)
        {
            this.pb = pb;
        }

        public void CreatePerson()
        {
            pb.BuildHead();
            pb.BuildBody();
            pb.BuildArmLeft();
            pb.BuildArmRight();
            pb.BuildLegLeft();
            pb.BuildLegRight();
        }
    }
}

在写两个类继承建造者类，只需写一些细节。

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

namespace BuildPattern
{
    class PersonThinBuilder:PersonBuilder
    {
        public PersonThinBuilder(Graphics g, Pen p) : base(g, p)
        {

        }

        public override void BuildHead()
        {
            g.DrawEcllipse(p, 50, 20, 30, 30);
        }

        public override void BuildBody()
        {
            g.DrawRectangle(p, 60, 50, 10, 50);
        }

        public override void BuildArmLeft()
        {
            g.DrawLine(p, 60, 50, 40, 100);
        }

        public override void BuildArmRight()
        {
            g.DrawLine(p, 70, 50, 90, 100);
        }

        public override void BuildLegLeft()
        {
            g.DrawLine(p, 60, 100, 45, 150);
        }

        public override void BuildLegRight()
        {
            g.DrawLine(p, 70, 100, 85, 150);
        }
    }
}

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

namespace BuildPattern
{
    class PersonFatBuilder : PersonBuilder
    {
        public PersonFatBuilder(Graphics g, Pen p) : base(g, p)
        {

        }

        public override void BuildHead()
        {
            g.DrawEcllipse(p, 50, 20, 30, 30);
        }

        public override void BuildBody()
        {
            g.DrawRectangle(p, 60, 50, 100, 80);
        }

        public override void BuildArmLeft()
        {
            g.DrawLine(p, 60, 50, 40, 100);
        }

        public override void BuildArmRight()
        {
            g.DrawLine(p, 70, 50, 90, 100);
        }

        public override void BuildLegLeft()
        {
            g.DrawLine(p, 60, 100, 45, 150);
        }

        public override void BuildLegRight()
        {
            g.DrawLine(p, 70, 100, 85, 150);
        }
    }
}

在写测试类

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

namespace BuildPattern
{
    class Program
    {
        static void Main(string[] args)
        {
            Pen p = new Pen(Color.Yellow);
            PersonThinBuilder ptb = new PersonThinBuilder(pictureBox1.CreateGraphics(), p);
            PersonDirector pdThin = new PersonDirector(ptb);
            pdThin.CreatePerson();

            PersonFatBuilder pfd=new PersonFatBuilder(pictureBox1.CreateGraphics(), p);
            PersonDirector pdFat = new PersonDirector(pfb);
            pdFat.CreatePerson();
        }
    }
}