抽象工厂模式

抽象工厂模式（Abstract Factory Pattern）是围绕一个超级工厂创建其他工厂。该超级工厂又称为其他工厂的工厂。这种类型的设计模式属于创建型模式，它提供了一种创建对象的最佳方式。
在抽象工厂模式中，接口是负责创建一个相关对象的工厂，不需要显式指定它们的类。每个生成的工厂都能按照工厂模式提供对象。

/** * 创建一个接口 * @author fan * */public interface Car {  public void driver();}/** * 接口实现类 * @author fan * */public class Bc implements Car{    @Override    public void driver() {        // TODO Auto-generated method stub        System.out.println("driver Bc");    }/** * 接口实现类 * @author fan * */public class Bmw implements Car{    @Override    public void driver() {        // TODO Auto-generated method stub        System.out.println("driver bmw");    }}public interface Color {    public void print();}public class Green implements Color {    @Override    public void print() {        // TODO Auto-generated method stub      System.out.println("green");    }}public class Red implements Color {    @Override    public void print() {        // TODO Auto-generated method stub      System.out.println("red");    }}/** * 创建抽象工厂 * @author fan * */public abstract class AbstractFactory {    abstract Color GetColors(String color);    abstract Car GetCar(String car);}/** *  创建工厂 * @author fan * */public class ColorFactory extends AbstractFactory{    @Override    public Color GetColors(String color) {        // TODO Auto-generated method stub        if (color == null) {            return null;        }        if (color.equalsIgnoreCase("GREEN")) {            return new Green();        } else if (color.equalsIgnoreCase("RED")) {            return new Red();        }        return null;    }    @Override    Car GetCar(String car) {        // TODO Auto-generated method stub        return null;    }}/** * 创建工厂 * @author fan * */public class CarFactory  extends AbstractFactory{    @Override    Color GetColors(String color) {        // TODO Auto-generated method stub        return null;    }    @Override    Car GetCar(String car) {        // TODO Auto-generated method stub        // TODO Auto-generated method stub        if (car == null) {            return null;        }        if (car.equalsIgnoreCase("BMW")) {            return new Bmw();        } else if (car.equalsIgnoreCase("BC")) {            return new Bc();        }        return null;    }}/** * 工厂生成器 * @author fan * */public class FactoryProducer {    public static AbstractFactory getFactory(String choice) {        if (choice.equalsIgnoreCase("COLOR")) {            return new ColorFactory();        } else if (choice.equalsIgnoreCase("CAR")) {            return new CarFactory();        }        // TODO Auto-generated method stub        return null;    }}public class Test {  public static void main(String[] args) {   AbstractFactory carFactory = FactoryProducer.getFactory("CAR");   AbstractFactory colorfactory = FactoryProducer.getFactory("COLOR");    Car bwm = carFactory.GetCar("bmw");    Car bc = carFactory.GetCar("bc");    bwm.driver();    bc.driver();    Color green = colorfactory.GetColors("GREEN");    Color red = colorfactory.GetColors("RED");    green.print();    red.print();}}