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Java建造者模式

时间:2018-12-15 15:50:14      阅读:161      评论:0      收藏:0      [点我收藏+]

标签:讲解   class   返回   res   部分   接口   setname   工厂模式   main   

建造者模式

建造者模式适用场景:

  建造一个复杂的对象适用,将构建对象的过程分开,每个类单独构造对象的一部分,最后组装起来,返回我们需要的对象。

下面的例子主要讲解构造一个飞船

Demo: 

//要获得的对象,但是各个组件要拆分开,让对应的类去实现

class AirShip {
  private OrbitaModule orbitaModule;//轨道舱
  private Engine engine; //发动机
  private EscapeTower escapeTower;//逃逸塔
  public OrbitaModule getOrbitaModule() {
    return orbitaModule;
  }
  public void setOrbitaModule(OrbitaModule orbitaModule) {
    this.orbitaModule = orbitaModule;
  }
  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 OrbitaModule{

  private String name;

  public String getName() {

    return name;

  }

  public void setName(String name) {

    this.name = name;

  }

  public OrbitaModule(String name) {

    super();

  this.name = name;

  }

}

class Engine{

  private String name;

  public String getName() {

    return name;

  }

  public void setName(String name) {

    this.name = name;

  }

  public Engine(String name) {

    super();

    this.name = name;

  }

}

class EscapeTower{

  private String name;

  public String getName() {

    return name;

  }

  public void setName(String name) {

    this.name = name;

  }

  public EscapeTower(String name) {

    super();

    this.name = name;

  } 

}

 

public interface AirShipBuilder {

 

  Engine builderEngine();
  OrbitaModule builderOrbitaModule();
  EscapeTower builderEscapeTower();
}

//创建返回对象的接口

public interface AirShipDirector {
  AirShip directAirShip();
}

//组装对象的实现类

public class AirShipBuilderImpl implements AirShipBuilder{

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

  @Override
  public OrbitaModule builderOrbitaModule() {
    System.out.println("构建逃逸塔");
    return new OrbitaModule("逃逸塔");
  }

  @Override
  public EscapeTower builderEscapeTower() {
    System.out.println("构建轨道舱");
    return new EscapeTower("轨道舱");
  }
}

//返回对象的实现类

public class AirShipDirectorImpl implements AirShipDirector{

  //创建一个构造组件的接口对象,此处可以使用工厂模式进行修改

  private AirShipBuilder airShipBuilder;

  public AirShipDirectorImpl(AirShipBuilder airShipBuilder) {
    super();
    this.airShipBuilder = airShipBuilder;
  }
  @Override
  public AirShip directAirShip() {
    Engine builderEngine = airShipBuilder.builderEngine();
    OrbitaModule builderOrbitaModule = airShipBuilder.builderOrbitaModule();
    EscapeTower builderEscapeTower = airShipBuilder.builderEscapeTower();
    AirShip ship = new AirShip();
    ship.setEngine(builderEngine);
    ship.setEscapeTower(builderEscapeTower);
    ship.setEscapeTower(builderEscapeTower);
    return ship;
  }
}

//客户端调用

public class Client {

  public static void main(String[] args) {
    AirShipDirector airShipDirector = new AirShipDirectorImpl(new AirShipBuilderImpl());
    AirShip directAirShip = airShipDirector.directAirShip();
    System.out.println(directAirShip);
  }
}

建造者模式主要就是将建造飞船的过程简单的拆分开,让构建飞船的不同的组件让不同的类去完成,此处就可以和工厂模式和单例模式相结合,让开发变得更加清晰。

 

Java建造者模式

标签:讲解   class   返回   res   部分   接口   setname   工厂模式   main   

原文地址:https://www.cnblogs.com/zl96291/p/10123375.html

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