标签：ati stat 测试结果 红色 ctf sys private print 增加
昨天说好今天写下工厂模式的，主要介绍下简单工厂模式、工厂模式、抽象工厂模式，感觉也不要特别纠结于他们之间的不同，很容易把自己绕晕
简单工厂(通过传入的参数决定调用哪个实现）
定义一个shape接口，有draw（）方法， Circle Rectangle分别实现shape接口
public interface Shape {
public void draw();
}
1 public class Rectangle implements Shape { 2 3 @Override 4 public void draw() { 5 System.out.println("draw Rectangle"); 6 7 } 8 9 }
public class Circle implements Shape { @Override public void draw() { System.out.println("draw Circle"); }
工厂类(这里用了单例模式创造工厂)
public class ShapeFactory { private static ShapeFactory sf; private ShapeFactory(){}; public static ShapeFactory getInstance(){ if(sf == null){ sf = new ShapeFactory(); } return sf; } public Shape getShape(String shapeType){ if(shapeType == null){ return null; } if(shapeType.equals("circle")){ return new Circle(); } if(shapeType.equals("rectangle")){ return new Rectangle(); } return null; } }
测试类
public class Test { public static void main(String[] args) { // TODO Auto-generated method stub ShapeFactory sf = ShapeFactory.getInstance(); Shape s = sf.getShape("circle"); s.draw(); } }
测试结果：draw Circle
工厂模式（不需要参数决定)
shapeFactory不设计成class,设计为Abstract class或者interface 由具体的CircleFactory 或者 RectangleFactory来决定实现哪个工厂 创造哪个形状
public interface ShapeFactory { public Shape getShape(); }
public class CircleFactory implements ShapeFactory{ @Override public Shape getShape() { return new Circle(); } }
public static void factory(){ ShapeFactory sf = new CircleFactory(); Shape s = sf.getShape(); s.draw(); }
测试结果：draw Circle
抽象工厂模式：增加了产品 不再只有Shape 还有Color interface Red/Green 分别实现，嫌麻烦粘在一起了
public interface Color { public void fill(); } //Red实现 public class Red implements Color { @Override public void fill() { System.out.println("fill Red"); } } //Green实现 public class Green implements Color { @Override public void fill() { System.out.println("fill Green"); } }
抽象工厂
public interface AbstractFactory { public Shape getShape(); public Color getColor(); }
生产红色的圆
public class RedCircleFactory implements AbstractFactory { public Shape getShape() { return new Circle(); } public Color getColor() { // TODO Auto-generated method stub return new Red(); } }
测试类就不写 很简单 ，菜鸟教程：http://www.runoob.com/design-pattern/abstract-factory-pattern.html
标签：ati stat 测试结果 红色 ctf sys private print 增加
原文地址：https://www.cnblogs.com/hs5201314tx/p/9532597.html
