GOF23设计模式（四）

GOF设计模式之建造者模式(Builder)

建造者模式

接口方法

飞船接口

public interface AirShipBuilder {
	Engine engineBuilder();
	OrbitalModule orbitaModuleBuilder();
	EscapeTower escapeTowerBuilder();
}

管理（建造）

public interface Director {
	AirShip creatAirShip();
}

继承

继承飞船接口

public class XXAirShipBuilder implements AirShipBuilder{
	@Override
	public Engine engineBuilder() {
		System.out.println("建造引擎");
		return new Engine("XX牌引擎");
	}
	@Override
	public OrbitalModule orbitaModuleBuilder() {
		System.out.println("建造轨道舱");
		return new OrbitalModule("XX牌轨道舱");
	}
	@Override
	public EscapeTower escapeTowerBuilder() {
		System.out.println("建造逃逸塔");
		return new EscapeTower("XX牌逃逸塔");
	}
}

继承建造接口

public class AirShipDirector implements Director{
	private AirShipBuilder builder;
	
	public AirShipDirector(AirShipBuilder builder) {
		this.builder = builder;
	}
	@Override
	public AirShip creatAirShip() {
		Engine e=builder.engineBuilder();
		OrbitalModule d=builder.orbitaModuleBuilder();
		EscapeTower t=builder.escapeTowerBuilder();
		
		AirShip ship=new AirShip();
		ship.setEngine(e);
		ship.setOrbitalModule(d);
		ship.setEscapeTower(t);
		return ship;
	}
}

飞船类与相关组件

/**
 * XX牌飞船
 */
public class AirShip {
	private OrbitalModule orbitalModule; //轨道舱
	private Engine engine; //发动机
	private EscapeTower escapeTower; //逃逸塔
	//这里可以加入相关方法
	
	public OrbitalModule getOrbitalModule() {
		return orbitalModule;
	}
	public void setOrbitalModule(OrbitalModule orbitalModule) {
		this.orbitalModule = orbitalModule;
	}
	public Engine getEngine() {
		return engine;
	}
	public void setEngine(Engine engine) {
		this.engine = engine;
	}
	public EscapeTower getEscapeTower() {
		return escapeTower;
	}
	public void setEscapeTower(EscapeTower escapeTower) {
		this.escapeTower = escapeTower;
	}
}
class OrbitalModule{
	private String name;
	public OrbitalModule(String name) {
		this.name = name;
	}
	public String getName() {
		return name;
	}
}
class Engine{
	private String name;
	public Engine(String name) {
		this.name = name;
	}
	public String getName() {
		return name;
	}
}
class EscapeTower{
	private String name;
	public EscapeTower(String name) {
		this.name = name;
	}
	public String getName() {
		return name;
	}
}

测试

public class Client {
public static void main(String[] args) {
AirShipDirector director=new AirShipDirector(new XXAirShipBuilder());
AirShip ship=director.creatAirShip();
System.out.println(ship.getEngine().getName());
}
}```

结果

建造引擎
建造轨道舱
建造逃逸塔
XX牌引擎