【GOF23设计模式】建造者模式

来源：http://www.bjsxt.com/ 
一、【GOF23设计模式】建造者模式详解类图关系

建造飞船

package com.test.Builder;

public class AirShip {
    private OrbitalModule orbitalModule;//轨道舱
    private Engine engine;//发动机
    private EscapeTower escapeTower;//逃逸塔

    public void launch(){
        System.out.println("发射！");
    }

    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) {
        super();
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}
class Engine{
    private String name;

    public Engine(String name) {
        super();
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}
class EscapeTower{
    private String name;

    public EscapeTower(String name) {
        super();
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

构造接口

package com.test.Builder;

public interface AirShipBuilder {
    OrbitalModule buildOrbitalModule();
    Engine builderEngine();
    EscapeTower builderEscapeTower();
}

组装接口

package com.test.Builder;

public interface AirShipDirector {
    /**
     * 组装飞船对象
     */
    AirShip directAirShip();
}

构造实现类

package com.test.Builder;
/**
 * StringBuilder，以后学习XML解析中，JDOM库中的类：DomBuilder,SaxBuilder
 */
public class SxtAirShipBuilder implements AirShipBuilder{

    @Override
    public OrbitalModule buildOrbitalModule() {
        System.out.println("构建sxt轨道舱");
        return new OrbitalModule("sxt轨道舱");
    }

    @Override
    public Engine builderEngine() {
        System.out.println("构建sxt发动机");
        return new Engine("sxt发动机");
    }

    @Override
    public EscapeTower builderEscapeTower() {
        System.out.println("构建sxt逃逸塔");
        return new EscapeTower("sxt逃逸塔");
    }
}

组装实现类

package com.test.Builder;

public class SxtAirShipDirector implements AirShipDirector{

    private AirShipBuilder builder;

    public SxtAirShipDirector(AirShipBuilder builder) {
        super();
        this.builder = builder;
    }

    @Override
    public AirShip directAirShip() {
        OrbitalModule o = builder.buildOrbitalModule();
        Engine e = builder.builderEngine();
        EscapeTower et = builder.builderEscapeTower();

        AirShip ship = new AirShip();
        ship.setOrbitalModule(o);
        ship.setEngine(e);
        ship.setEscapeTower(et);
        return ship;
    }
}

package com.test.Builder;

public class Client {
    public static void main(String[] args) {
        AirShipDirector director = new SxtAirShipDirector(new SxtAirShipBuilder());
        AirShip ship = director.directAirShip();
        System.out.println(ship.getEngine().getName());
        ship.launch();
    }
}