建造者模式_设计模式_java

建造者模式:
顾名思义:是创造型模式
而最重要的是解耦来获得建造者和用户之间的依赖关系
JDK中的StringBuldder就是用的建造者设计模式

类图:

1.House.java

public class House {
  private String baise;
  private String wall;
  private String roofed;
  public String getBaise() {
    return baise;
  }
  public void setBaise(String baise) {
    this.baise = baise;
  }
  public String getWall() {
    return wall;
  }
  public void setWall(String wall) {
    this.wall = wall;
  }
  public String getRoofed() {
    return roofed;
  }
  public void setRoofed(String roofed) {
    this.roofed = roofed;
  }
  
  

}

抽象的建造者
2.HouseBuild.java

public abstract class HouseBuilder {
  protected House house = new House();
  
  //建造的流程
  public abstract void buildBasic();
  
  public abstract void buildWoll();
  
  public abstract void buildroofed();
  
  //建造房子
  public House buildHouse() {
    return house;
  }
}

具体的建造者
3.HouseDircter.java

public class HouseDirector {
  HouseBuilder houseBuilder = null;
  

  //1.构造器
  public HouseDirector(HouseBuilder housebuilder) {
    this.houseBuilder = housebuilder;
  }
  //2.set

  public void setHouseBuilder(HouseBuilder houseBuilder) {
    this.houseBuilder = houseBuilder;
  }
  
  //如何做交给指挥者
  public House constructHouse() {
    houseBuilder.buildBasic();
    houseBuilder.buildroofed();
    houseBuilder.buildWoll();
    return houseBuilder.buildHouse();
  }
  
}

一个普通的建造者`
4.CommonHouse.java

public class CommonHouse extends HouseBuilder{

  @Override
  public void buildBasic() {
    // TODO 自动生成的方法存根
    System.out.println("打地基");
    
  }

  @Override
  public void buildWoll() {
    // TODO 自动生成的方法存根
    System.out.println("砌墙");
  }

  @Override
  public void buildroofed() {
    // TODO 自动生成的方法存根
    System.out.println("建墙");
  }

}

用户
5.client.java

public class Client {
  public static void main(String[] args) {
    CommonHouse commonHouse = new CommonHouse();
    HouseDirector houseDirector = new HouseDirector(commonHouse);
    
    //完成盖房,返回房子
    House house = houseDirector.constructHouse();
    
    }

}

运行结果