建造者模式也叫做生成器模式
1.需要建房子：这一过程为打桩、砌墙、封顶
2.房子有各种各样的，比如普通房，高楼、别墅，各种房子的过程虽然一样，但是要求不相同。
3.请编写程序，完成需求。
package com.builder;
public abstract class AbstractHouse {
//打地基
public abstract void buildBasic();
//砌墙
public abstract void buildWalls();
//封顶
public abstract void roofed();
//依次调用者三个方法
public void build(){
buildBasic();
buildWalls();
roofed();
}
}
package com.builder;
public class CommonHouse extends AbstractHouse {
@Override
public void buildBasic() {
System.out.println("普通房子打地基");
}
@Override
public void buildWalls() {
System.out.println("普通房子砌墙");
}
@Override
public void roofed() {
System.out.println("普通房子封顶");
}
}
package com.builder;
public class HighHouse extends AbstractHouse {
@Override
public void buildBasic() {
System.out.println("高楼房子打地基");
}
@Override
public void buildWalls() {
System.out.println("高楼房子砌墙");
}
@Override
public void roofed() {
System.out.println("高楼房子封顶");
}
}
package com.builder;
public class Client {
public static void main(String[] args) {
CommonHouse commonHouse = new CommonHouse();
commonHouse.build();
}
}
运行结果:
普通房子打地基
普通房子砌墙
普通房子封顶
package com.builder.improve;
//产品---->product
public class House {
private String base;
private String wall;
private String roofed;
public String getBase() {
return base;
}
public void setBase(String base) {
this.base = base;
}
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;
}
}
package com.builder.improve;
//抽象的建造者
public abstract class HouseBuilder {
protected House house=new House();
//将建造的流程写好，抽象的方法
public abstract void buildBase();
public abstract void buildWalls();
public abstract void buildRoofed();
//建造号房子之后，将产品（房子）返回
public House buildHouse(){
return house;
}
}
package com.builder.improve;
/**
* 下面的建造顺序我是可以根据自己的需要进行改动的
*/
public class CommonHouse extends HouseBuilder {
@Override
public void buildBase() {
System.out.println("普通房子打地基");
}
@Override
public void buildWalls() {
System.out.println("普通房子砌墙");
}
@Override
public void buildRoofed() {
System.out.println("普通房子封底");
}
}
package com.builder.improve;
public class HighBuilding extends HouseBuilder {
@Override
public void buildBase() {
System.out.println("高楼打地基");
}
@Override
public void buildWalls() {
System.out.println("高楼浇筑混凝土墙体");
}
@Override
public void buildRoofed() {
System.out.println("高楼封底了");
}
}
package com.builder.improve;
/**
* 创建指挥者 指挥具体的建造流程
* 当然，这里的指挥者是可以有多个的，指挥者可以自己制定建造房子的具体流程
* 但是使用之前的那种继承方式就不行了
*/
public class HouseDirector {
HouseBuilder houseBuilder=null;
//构造器传入 houseBuilder
public HouseDirector(HouseBuilder houseBuilder) {
this.houseBuilder = houseBuilder;
}
//通过setter方法 传入 houseBuilder
public void setHouseBuilder(HouseBuilder houseBuilder) {
this.houseBuilder = houseBuilder;
}
//如何处理建造房子的流程，交给指挥者
public House constructHouse(){
houseBuilder.buildBase();
houseBuilder.buildWalls();
houseBuilder.buildRoofed();
return houseBuilder.buildHouse();
}
}
package com.builder.improve;
public class Client {
public static void main(String[] args) {
//盖普通房子
CommonHouse commonHouse = new CommonHouse();
HouseDirector houseDirector = new HouseDirector(commonHouse);
House house = houseDirector.constructHouse();
}
}
运行结果;
普通房子打地基
普通房子砌墙
普通房子封底
原文：https://www.cnblogs.com/dongyaotou/p/15172591.html