1. 复杂对象创建，包含多步骤
2. 建造流程相对固定
代码实现：造车
模型：
namespace BuilderPattern.Models
{
public class Engine
{
public string Name { get; set; }
}
public class Wheel
{
public string Name { get; set; }
}
public class Light
{
public string Name { get; set; }
}
public class Car
{
public Car(Engine engine,Wheel wheel,Light light)
{
}
public string Name { get; set; }
}
}
建造者：
public abstract class AbstractBuilder
{
public abstract void BuildEngine();
public abstract void BuildWheel();
public abstract void BuildLight();
public abstract Car BuildCar();
}
public class BuilderTesla:AbstractBuilder
{
private Engine _engine = null;
private Wheel _wheels = null;
private Light _lights = null;
public override void BuildEngine()
{
_engine = new Engine(){Name = "Tesla_Engine"};
Console.WriteLine($"{this.GetType().Name} build {_engine.Name}");
}
public override void BuildWheel()
{
_wheels = new Wheel() { Name = "Tesla_Wheels" };
Console.WriteLine($"{this.GetType().Name} build {_wheels.Name}");
}
public override void BuildLight()
{
_lights = new Light() { Name = "Tesla_Light" };
Console.WriteLine($"{this.GetType().Name} build {_lights.Name}");
}
public override Car BuildCar()
{
var car = new Car(_engine,_wheels,_lights) { Name = "Tesla_Model Y" };
Console.WriteLine($"{this.GetType().Name} build {car.Name}");
return car;
}
}
导演：
public class Director
{
private readonly AbstractBuilder _abstractBuilder;
public Director(AbstractBuilder abstractBuilder)
{
_abstractBuilder = abstractBuilder;
}
public Car GetCar()
{
_abstractBuilder.BuildEngine();
_abstractBuilder.BuildWheel();
_abstractBuilder.BuildLight();
var car = _abstractBuilder.BuildCar();
return car;
}
}
上层调用：
class Program
{
static void Main(string[] args)
{
BuilderTesla builderTesla = new BuilderTesla();
Director director = new Director(builderTesla);
director.GetCar();
}
}
结果：
原文：https://www.cnblogs.com/YourDirection/p/14067560.html