創建者模式，主要針對某些產品有類似的生產步驟，且有需要有先後順序的進行各個部件的生成。

　　一、示例展示：

　　通過學習及總結，以下是我完成的創建者模式的示例：

　　1.創建產品類：Laptop

public class Laptop
{
    ArrayList LaptopParts = new ArrayList();
    public void AddParts(string PartName)
    {
        LaptopParts.Add(PartName);
    }

    public void ShowPartList()
    {
        
 
foreach (string part in LaptopParts)
        {
            Console.WriteLine(part);
        }
    }
}

　　2. 創建抽象創建者角色：AbstractBuilder

public abstract class AbstractBuilder
{
    public abstract void CreateCPU();
    public abstract void CreateScreen();
    public abstract void CreateKeyboard();
    
 
public abstract Laptop GetLaptop();
}

　　3. 創建具體創建者角色：AppleLaptopBuilder

public class AppleLaptopBuilder : AbstractBuilder
{
    private Laptop laptop = new Laptop();
    public override void CreateCPU()
    {
        laptop.AddParts("Apple CPU is very fast!");
    }

    public override
 
 void CreateKeyboard()
    {
        laptop.AddParts("The experience of apple Keyboard is wouderful!");
    }

    public override void CreateScreen()
    {
        laptop.AddParts("The experience of apple screen is really amazing!");
    }

    public override Laptop GetLaptop()
    {
        return laptop;
    }
}

　　4. 創建具體創建者角色：LenovoLaptopBuilder

public class LenovoLaptopBuilder : AbstractBuilder
{
    private Laptop laptop = new Laptop();
    public override void CreateCPU()
    {
        laptop.AddParts("Lenovo CPU is very good!");
    }

    public override void CreateKeyboard()
    {
        laptop.AddParts("Lenovo Keyboard looks amazing!");
    }

    public override void CreateScreen()
    {
        laptop.AddParts("Lenovo screen is wounderful!");
    }

    public override Laptop GetLaptop()
    {
        return laptop;
    }
}

　　5. 創建指導者角色：Director

public class Director
{
    public void Construct(AbstractBuilder builder)
    {
        builder.CreateCPU();
        builder.CreateKeyboard();
        builder.CreateScreen();
        builder.GetLaptop();
    }
}

　　6. 定義客戶端調用：

class Program
{
    static void Main(string[] args)
    {
        Director director = new Director();

        AppleLaptopBuilder alBuilder = new AppleLaptopBuilder();
        director.Construct(alBuilder);
        Laptop AppLaptop = alBuilder.GetLaptop();
        AppLaptop.ShowPartList();

        LenovoLaptopBuilder llBuilder = new LenovoLaptopBuilder();
        director.Construct(llBuilder);
        Laptop LnLaptop = llBuilder.GetLaptop();
        LnLaptop.ShowPartList();
        Console.ReadLine();
    }
}

　　二、創建者模式設計理念：

　　通過抽象創建者角色來限制及規範產品的結構，且針對產品的每個部件都需要相應的建構方法。具體的創建者角色負責創建產品的實例，在這個過程中間，指導者的角色負責創建產品的實例的具體步驟(可以隨產品的具體創建步驟而增加或減少)。

　　三、角色及關系：

設計模式學習總結（五）創建者模式(Builder)