建造者模式
1、什么是建造者模式2、建造者模式的结构3、建造者模式应用场景4、代码实现
1、什么是建造者模式
Builder模式也叫建造者模式或者生成器模式，是由GoF提出的23种设计模式中的一种。Builder模式是一种对象创建型模式之一，用来隐藏复合对象的创建过程，它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。
2、建造者模式的结构
3、建造者模式应用场景
对象的创建：Builder模式是为对象的创建而设计的模式创建的是一个复合对象：被创建的对象为一个具有复合属性的复合对象关注对象创建的各部分的创建过程：不同的工厂（这里指builder生成器）对产品属性有不同的创建方法
4、代码实现
package com.example.demo01;
/**
* 房子
* @author Guardian
*
*/
public class House {
//地板
private String floor;
//墙
private String wall;
//屋顶
private String housetop;
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;
}
public String getHousetop() {
return housetop;
}
public void setHousetop(String housetop) {
this.housetop = housetop;
}
}
package com.example.demo01;
/**
* 工程队
* @author Guardian
*
*/
public interface HouseBuilder {
//修地板
public void makeFloor();
//修墙
public void makeWall();
//修屋顶
public void makeHousetop();
public House getHouse();
}
package com.example.demo01;
public class HouseDirector {
private HouseBuilder builder;
public HouseDirector(HouseBuilder builder) {
super();
this.builder = builder;
}
public void makeHouse(){
builder.makeFloor();
builder.makeWall();
builder.makeHousetop();
}
}
package com.example.demo01;
/**
* 公寓工程队
* @author Guardian
*
*/
public class GongyuBuilder implements HouseBuilder{
House house = new House();
@Override
public void makeFloor() {
house.setFloor("公寓-->地板");
}
@Override
public void makeWall() {
house.setWall("公寓-->墙");
}
@Override
public void makeHousetop() {
house.setHousetop("公寓-->房顶");
}
@Override
public House getHouse() {
return house;
}
}
package com.example.demo01;
/**
* 平房工程队
* @author Guardian
*
*/
public class PingFangBuilder implements HouseBuilder{
House house = new House();
@Override
public void makeFloor() {
house.setFloor("平房-->地板");
}
@Override
public void makeWall() {
house.setWall("平房-->墙");
}
@Override
public void makeHousetop() {
house.setHousetop("平房-->房顶");
}
@Override
public House getHouse() {
return house;
}
}
package com.example.demo01;
import org.junit.Test;
public class MainClass {
@Test
public void test01(){
//客户直接造房子
House house = new House();
house.setFloor("地板");
house.setWall("墙");
house.setHousetop("屋顶");
}
@Test
public void test02(){
//由工程队来修
HouseBuilder builder = new PingFangBuilder();
builder.makeFloor();
builder.makeHousetop();
builder.makeWall();
House house = builder.getHouse();
System.out.println(house.getFloor());
System.out.println(house.getWall());
System.out.println(house.getHousetop());
}
@Test
public void test03(){
//由工程队来修
HouseBuilder builder = new PingFangBuilder();
//设计者来做
HouseDirector director = new HouseDirector(builder);
director.makeHouse();
House house = builder.getHouse();
System.out.println(house.getFloor());
System.out.println(house.getWall());
System.out.println(house.getHousetop());
//由工程队来修
HouseBuilder builder_gongyu = new GongyuBuilder();
//设计者来做
HouseDirector director_gongyu = new HouseDirector(builder_gongyu);
director_gongyu.makeHouse();
House house_gongyu = builder_gongyu.getHouse();
System.out.println(house_gongyu.getFloor());
System.out.println(house_gongyu.getWall());
System.out.println(house_gongyu.getHousetop());
}
}
