依赖注入和流畅设计

(建筑商是单身)

@Component
public class houseBuilder{

     private WindowMaker windowMaker;
     private DoorMaker doorMaker;
     private RoofMaker roofMaker;

     @Autowired
     public houseBuilder(WindowsMaker wm, DoorMaker dm, RoofMaker rm){
            this.windowMaker = wm;
            this.doorMaker = dm;
            this.roofMaker = rm;
     }

     //Other methods omitted for brevity

}

Foundation foundation = new Foundation();

HouseBuilder hb = new HouseBuilder(foundation)
.windowMaker(args)
.doorMaker(args)
.roofMaker(args);