1public class Building {// 建筑物
2
3 // 用来模拟房子组件的堆叠
4 private List<String> buildingComponents = new ArrayList<>();
5
6 public void setBasement(String basement) {// 地基
7 this.buildingComponents.add(basement);
8 }
9
10 public void setWall(String wall) {// 墙体
11 this.buildingComponents.add(wall);
12 }
13
14 public void setRoof(String roof) {// 房顶
15 this.buildingComponents.add(roof);
16 }
17
18 @Override
19 public String toString() {
20 String buildingStr = "";
21 for (int i = buildingComponents.size() - 1; i >= 0; i--) {
22 buildingStr = buildingComponents.get(i);
23 }
24 return buildingStr;
25 }
26
27}
1public interface Builder {//施工方接口
2
3 public void buildBasement();
4
5 public void buildWall();
6
7 public void buildRoof();
8
9 public Building getBuilding();
10
11}
1public class HouseBuilder implements Builder {//别墅施工方
2
3 private Building house;
4
5 public HouseBuilder() {
6 house = new Building();
7 }
8
9 @Override
10 public void buildBasement() {
11 System.out.println("挖地基，部署管道、线缆，水泥加固，搭建围墙、花园。");
12 house.setBasement("╬╬╬╬╬╬╬╬\n");
13 }
14
15 @Override
16 public void buildWall() {
17 System.out.println("搭建木质框架，石膏板封墙并粉饰内外墙。");
18 house.setWall("｜田｜田 田|\n");
19 }
20
21 @Override
22 public void buildRoof() {
23 System.out.println("建造木质屋顶、阁楼，安装烟囱，做好防水。");
24 house.setRoof("╱◥███◣\n");
25 }
26
27 @Override
28 public Building getBuilding() {
29 return house;
30 }
31
32}
1public class ApartmentBuilder implements Builder {// 高层公寓楼施工方
2
3 private Building apartment;
4
5 public ApartmentBuilder() {
6 apartment = new Building();
7 }
8
9 @Override
10 public void buildBasement() {
11 System.out.println("深挖地基，修建地下车库，部署管道、线缆、风道。");
12 apartment.setBasement("╚═════════╝\n");
13 }
14
15 @Override
16 public void buildWall() {
17 System.out.println("搭建多层建筑框架，建造电梯井，钢筋混凝土浇灌。");
18 for (int i = 0; i < 8; i ) {// 此处假设固定8层
19 apartment.setWall("║ □ □ □ □ ║\n");
20 }
21 }
22
23 @Override
24 public void buildRoof() {
25 System.out.println("封顶，部署通风井，做防水层，保温层。");
26 apartment.setRoof("╔═════════╗\n");
27 }
28
29 @Override
30 public Building getBuilding() {
31 return apartment;
32 }
33
34}
1public class Director {//工程总监
2
3 private Builder builder;
4
5 public Director(Builder builder) {
6 this.builder = builder;
7 }
8
9 public void setBuilder(Builder builder) {
10 this.builder = builder;
11 }
12
13 public Building direct() {
14 System.out.println("=====工程项目启动=====");
15 // 第一步，打好地基；
16 builder.buildBasement();
17 // 第二步，建造框架、墙体；
18 builder.buildWall();
19 // 第三步，封顶；
20 builder.buildRoof();
21 System.out.println("=====工程项目竣工=====");
22 return builder.getBuilding();
23 }
24
25}