一、概述
1.抽象工厂：当情况是需要产生一系列产品，若需更换产品，则要求一系列产品一起换，且要控制一系列产品的产生过程，此时可考虑抽象工厂模式。例：小明装修屋子，把电视、冰箱都替换掉，他这次需要把电视、冰箱换成三星的，下次装修可能要换成海尔的。此时可设计抽象类Telveison及Fridge负责产生产品,抽象工厂AbstractFactory负责产生一系列产品
PS:抽象工厂与普通工厂各自的优缺点：
(1)普通工厂容易在产品维度进行扩展，但产生系列产品时不方便，且易造成工厂类泛滥
(2)抽象工厂增加新产品时，要修改AbstractFactory等多处地方
二、类结构
1.Televison.java
2.Fridge.java
3.SamsumgTelevison.java
4.SamsungFridge.java
5.HaierTevevison.java
6.HaierFridge.java
7.AbstractFactory.java
8.SamsungFactory.java
9.HaierFactory.java
三、代码
1.Televison.java
public abstract class Televison {
abstract void show();
}
2.Fridge.java
public abstract class Fridge {
abstract void cool();
}
3.SamsumgTelevison.java
public class SamsungTelevison extends Televison {
@Override
public void show(){
System.out.println("SamsungTelevison showing...........");
}
}
4.SamsungFridge.java
public class SamsungFridge extends Fridge {
@Override
void cool() {
System.out.println("SamsungFridge cooling");
}
}
5.HaierTevevison.java
public class HaierTelevison extends Televison {
@Override
void show() {
System.out.println("海尔电视 showinng...........");
}
}
6.HaierFridge.java
public class HaierFridge extends Fridge {
@Override
void cool() {
System.out.println("海尔冰箱冷却中............");
}
}
7.AbstractFactory.java
public abstract class AbstractFactory {
abstract Televison createTelevison();
abstract Fridge createFridge();
}
8.SamsungFactory.java
public class SamsungFactory extends AbstractFactory {
@Override
Televison createTelevison() {
return new SamsungTelevison();
}
@Override
Fridge createFridge() {
return new SamsungFridge();
}
}
9.HaierFactory.java
public class HaierFactory extends AbstractFactory {
@Override
Televison createTelevison() {
return new HaierTelevison();
}
@Override
Fridge createFridge() {
return new HaierFridge();
}
}
10.Test.java
public class Test {
@org.junit.Test
public void test(){
AbstractFactory factory = new SamsungFactory();
Televison tv = factory.createTelevison();
Fridge fridge = factory.createFridge();
tv.show();
fridge.cool();
System.out.println("=======================================");
factory = new HaierFactory();
tv = factory.createTelevison();
fridge = factory.createFridge();
tv.show();
fridge.cool();
}
}
运行结果：
