设计模式（六）抽象工程模式

概念：抽象工厂模式是工厂方法模式的升级版本，在有多个业务品种、业务分类时，通过抽象工厂模式产生需要的对象是一种非常好的解决方式。

适用于多个细分的部分组成的一个产品的制造工厂。

例子：一个世界级的足球俱乐部，需要伟大的球衣，雄厚的资金，优质的球场草皮

抽象一个足球队的工厂接口，FootBallTeamFactory，里面3个方法接口Player，Money，Place

public interface FootBallTeamFactory {Player createPlayer();Money createMoney();Place createPlace();}

public interface Player {public void play();}

public interface Money {public void pay();}

public interface Place {public void haveLand();}

伟大俱乐部工厂GreatFootBallTeam实现FootBallTeamFactory,并且实现其方法，返回其方法的实现类GoodPlayer，MoreMoney，GoodPlayer

public class GreatFootBallTeam implements FootBallTeamFactory{@Overridepublic GoodPlayer createPlayer() {return new GoodPlayer();}@Overridepublic MoreMoney createMoney() {return new MoreMoney();}@Overridepublic BroadPlace createPlace() {return new BroadPlace();}}

public class GoodPlayer implements Player {@Overridepublic void play() {System.out.println("世界级表现");}}

public class MoreMoney implements Money {@Overridepublic void pay() {System.out.println("资金雄厚");}}

public class BroadPlace implements Place{@Overridepublic void haveLand() {System.out.println("良好的草皮");}}

测试方法如下：

public class ClientTest {public static void main(String[] args) {FootBallTeamFactory factory = new GreatFootBallTeam();Player player = factory.createPlayer();Money money = factory.createMoney();Place place = factory.createPlace();player.play();money.pay();place.haveLand();}}

控制台输出结果为：

世界级表现
资金雄厚
良好的草皮