思考：工厂方法模式：http://www.cnblogs.com/maggiejyt/p/7561253.html
工厂方法模式UML：
问题：如果这家工厂不止要生产Ball(球),还要还有Sneakers（球鞋）等
则UML图为
当Product有多种类时则是抽象工厂模式
代码（Ball的代码见简单工厂模式：http://www.cnblogs.com/maggiejyt/p/7561253.html）
Sneakers（球鞋抽象类）
package com.maggie.FactoryMethod;
public abstract class Sneakers {
private String name;
public Sneakers(String name) {
super ();
this .name = name;
}
public Sneakers() {
super ();
}
public String getName() {
return name;
}
public void setName(String name) {
this .name = name;
}
public abstract void show();
}
FootSneakers（足球鞋）
package com.maggie.FactoryMethod;
public class FootSneakers extends Sneakers {
@Override
public void show() {
String show = "the sneakers is " + this .getName();
System.out.println(show);
}
public FootSneakers() {
super ();
}
public FootSneakers(String name) {
super (name);
}
}
BasketSneakers（篮球鞋）
package com.maggie.FactoryMethod;
public class BasketSneakers extends Sneakers {
@Override
public void show() {
String show = "the sneakers is "+ this .getName();
System.out.println(show);
}
public BasketSneakers() {
super();
}
public BasketSneakers(String name) {
super(name);
}
}
IFactory(工厂接口)
package com.maggie.FactoryMethod;
public interface IFactory {
public abstract Ball createBall();
public abstract Sneakers createSneakers();
}
FootSneakers（足球工厂）
package com.maggie.FactoryMethod;
public class FootSneakers extends Sneakers {
@Override
public void show() {
String show = "the sneakers is " + this.getName();
System.out.println(show);
}
public FootSneakers() {
super();
}
public FootSneakers(String name) {
super(name);
}
}
BasketFactory（篮球工厂）
package com.maggie.FactoryMethod;
public class BasketFactory implements IFactory {
@Override
public Ball createBall() {
// TODO Auto-generated method stub
return new BasketBall("oranger");
}
@Override
public Sneakers createSneakers() {
return new BasketSneakers("basketball sneakers");
}
}
客户端调用
package com.maggie.FactoryMethod;
public class Client {
public static void main(String[] args) {
IFactory iFactory = null;
iFactory = new FootFactory();
Ball footBall = iFactory.createBall();
Sneakers footSneakers = iFactory.createSneakers();
footBall.play();
footSneakers.show();
iFactory = new BasketFactory();
Ball basketBall = iFactory.createBall();
Sneakers basketSneakers = iFactory.createSneakers();
basketBall.play();
basketSneakers.show();
}
}
结果输出：
the ball‘s color is white+black,I am FootBall the sneakers is football sneakers the ball‘s color is oranger,I am BasketBall the sneakers is basketball sneakers
思考：
每次增加一种产品类，就要改动各种Factory的代码。。。。。
采用的是用简单工厂来改进抽象工厂
代码实现
SportsEquipmentFactory（采用简单工厂模式来改进）
package com.maggie.FactoryMethod;
public class SportsEquipmentFactory {
private static final String STYLE = "basket";
// private static final String STYLE="foot";只需要更改这里的代码配置
public static Ball createBall() {
Ball ball = null;
switch (STYLE) {
case "basket":
ball = new BasketBall("oranger");
break;
case "foot":
ball = new FootBall("white+black");
break;
}
return ball;
}
public static Sneakers createSneakers() {
Sneakers sneakers = null;
switch (STYLE) {
case "basket":
sneakers = new BasketSneakers("basketball sneakers");
break;
case "foot":
sneakers = new FootSneakers("football sneakers");
break;
}
return sneakers;
}
}
客户端调用
package com.maggie.FactoryMethod;
public class Client {
public static void main(String[] args) {
Ball ball = SportsEquipmentFactory.createBall();
ball.play();
Sneakers sneakers = SportsEquipmentFactory.createSneakers();
sneakers.show();
}
}
输出
the ball‘s color is oranger,I am BasketBall the sneakers is basketball sneakers
思考：如果业务又做大，工厂又需要生产网球类的产品，则需要在SportsEquipmentFactory的switch中增加case，这又违反了开放-封闭原则
这时就要考虑反射。。。。
时间： 2024-12-28 00:53:48