【GOF23设计模式】_建造者模式详解_类图关系JAVA232

最新推荐文章于 2022-06-15 18:07:31 发布

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最新推荐文章于 2022-06-15 18:07:31 发布

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分类专栏： JAVA 文章标签： GOF23设计模式建造者模式 java

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本文通过构建飞船的例子详细解释了建造者模式的设计理念及其在实际应用中的实现方式。介绍了飞船各个部件如轨道舱、发动机和逃逸塔的具体创建过程，并展示了如何通过建造者模式将这些部件组装成一个完整的飞船。

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来源：http://www.bjsxt.com/
一、S03E232_01【GOF23设计模式】建造者模式详解类图关系

建造者模式1

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();
    }
}

建造者模式2

建造者模式3