设计模式 -- 抽象工厂模式

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参考：http://www.runoob.com/design-pattern/abstract-factory-pattern.html
源码下载：https://github.com/gpqhl0071/pattern.git
这里写图片描述

1. 有多个简单工厂
2. 建立抽象方法获取想要的简单工厂的实例

代码

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory;public interface Color {    void fill();}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory;public interface Shape {    void draw();}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.impl;import com.pattern.abstractFactory.Shape;public class Circle implements Shape {    @Override    public void draw() {        System.out.println("Inside Circle::draw() method.");    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.impl;import com.pattern.abstractFactory.Shape;public class Rectangle implements Shape {    @Override    public void draw() {        System.out.println("Inside Rectangle::draw() method.");    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.impl;import com.pattern.abstractFactory.Shape;public class Square implements Shape {    @Override    public void draw() {        System.out.println("Inside Square::draw() method.");    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.impl;import com.pattern.abstractFactory.Color;public class Blue implements Color {    @Override    public void fill() {        System.out.println("Inside Blue::fill() method.");    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.impl;import com.pattern.abstractFactory.Color;public class Green implements Color {    @Override    public void fill() {        System.out.println("Inside Green::fill() method.");    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.impl;import com.pattern.abstractFactory.Color;public class Red implements Color {    @Override    public void fill() {        System.out.println("Inside Red::fill() method.");    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.factory;import com.pattern.abstractFactory.Color;import com.pattern.abstractFactory.Shape;public abstract class AbstractFactory {    public abstract Color getColor(String color);    public abstract Shape getShape(String shape);}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.factory;import com.pattern.abstractFactory.Color;import com.pattern.abstractFactory.Shape;import com.pattern.abstractFactory.impl.Blue;import com.pattern.abstractFactory.impl.Green;import com.pattern.abstractFactory.impl.Red;public class ColorFactory extends AbstractFactory {    @Override    public Shape getShape(String shapeType) {        return null;    }    @Override    public Color getColor(String color) {        if (color == null) {            return null;        }        if (color.equalsIgnoreCase("RED")) {            return new Red();        } else if (color.equalsIgnoreCase("GREEN")) {            return new Green();        } else if (color.equalsIgnoreCase("BLUE")) {            return new Blue();        }        return null;    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.factory;import com.pattern.abstractFactory.Color;import com.pattern.abstractFactory.Shape;import com.pattern.abstractFactory.impl.Circle;import com.pattern.abstractFactory.impl.Rectangle;import com.pattern.abstractFactory.impl.Square;public class ShapeFactory extends AbstractFactory {    @Override    public Shape getShape(String shapeType) {        if (shapeType == null) {            return null;        }        if (shapeType.equalsIgnoreCase("CIRCLE")) {            return new Circle();        } else if (shapeType.equalsIgnoreCase("RECTANGLE")) {            return new Rectangle();        } else if (shapeType.equalsIgnoreCase("SQUARE")) {            return new Square();        }        return null;    }    @Override    public Color getColor(String color) {        return null;    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.factory;public class FactoryProducer {    public static AbstractFactory getFactory(String choice) {        if (choice.equalsIgnoreCase("SHAPE")) {            return new ShapeFactory();        } else if (choice.equalsIgnoreCase("COLOR")) {            return new ColorFactory();        }        return null;    }}

/**Copyright (c) 2016, gp.inc and/or its affiliates. All rights reserved.*/package com.pattern.abstractFactory.test;import com.pattern.abstractFactory.Color;import com.pattern.abstractFactory.Shape;import com.pattern.abstractFactory.factory.AbstractFactory;import com.pattern.abstractFactory.factory.FactoryProducer;public class AbstractFactoryPatternDemo {    public static void main(String[] args) {        // 获取形状工厂        AbstractFactory shapeFactory = FactoryProducer.getFactory("SHAPE");        // 获取形状为 Circle 的对象        Shape shape1 = shapeFactory.getShape("CIRCLE");        // 调用 Circle 的 draw 方法        shape1.draw();        // 获取形状为 Rectangle 的对象        Shape shape2 = shapeFactory.getShape("RECTANGLE");        // 调用 Rectangle 的 draw 方法        shape2.draw();        // 获取形状为 Square 的对象        Shape shape3 = shapeFactory.getShape("SQUARE");        // 调用 Square 的 draw 方法        shape3.draw();        // 获取颜色工厂        AbstractFactory colorFactory = FactoryProducer.getFactory("COLOR");        // 获取颜色为 Red 的对象        Color color1 = colorFactory.getColor("RED");        // 调用 Red 的 fill 方法        color1.fill();        // 获取颜色为 Green 的对象        Color color2 = colorFactory.getColor("Green");        // 调用 Green 的 fill 方法        color2.fill();        // 获取颜色为 Blue 的对象        Color color3 = colorFactory.getColor("BLUE");        // 调用 Blue 的 fill 方法        color3.fill();    }}

结果

Inside Circle::draw() method.Inside Rectangle::draw() method.Inside Square::draw() method.Inside Red::fill() method.Inside Green::fill() method.Inside Blue::fill() method.

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