建造者模式:
也叫生成器模式。用来隐藏复合对象的创建过程,他把复合对象的创建过程加以抽象,通过子类继承和重载的方式,动态地创建具有复合属性的对象。
总结一句就是封装一个对象的构造过程,并允许按步骤构造。
产品:
public class House{
private String floor;
private String wall; public String getFloor(){
return floor;
}
public void setFloor(String floor){
this.floor=floor;
}
public String getWall(){
return wall;
}
public void setWall(String wall){
this.wall=wall;
}
}
建造者接口
public interface HouseBuilder{
public void makeFloor();
public void makeWall();
public House getHouse();
}
具体建造者类(实现建造者接口):
public class BigHouseBuilder implements HouseBuilder{
House house=new House();
public void makeFloor(){
house.setFloor("建bighouse的地板");
}
public void makeWall(){
house.setWall("建bighouse的墙");
}
public House getHouse(){
return house;
}
}
指挥具体建造者的设计师:
public class HouseDirector{
private HouseBuilder builder;
public HouseDirector(HouseBuilder builder){
this.builder=builder;
}
public void make(){
builder.makeFloor();
builder.makeWall();
}
}
客户端程序:
public class Main{
public static void main(String []args){
HouseBuilder builder=new BigHouseBuilder();
HouseDirector director=new HouseDirector(builder);
House house=builder.getHouse();
System.out.println(house.getFloor());
System.out.println(house.getWall());
}
}