Java设计模式——工厂模式示例

工厂模式

参考内容：工厂模式

1. 简单工厂模

   定义一个工厂类，根据传入的参数不同创建不同的实例

   package factoryPattern.simple;
   public interface Shape{
        void draw();
   }
   

   package factoryPattern.simple;
   // 画圆类
   public class CircleShape implements Shape{
   
       @Override
       public void draw() {
           System.out.println("开始画圆");
   
       }
       
   }
   

   package factoryPattern.simple;
   
   public class RectShape implements Shape{
   
       @Override
       public void draw() {
           System.out.println("绘制矩形");
   
       }
       
   }
   

   package factoryPattern.simple;
   
   public class TangleShape implements Shape{
   
       @Override
       public void draw() {
           System.out.println("绘制三角形");
   
       }
       
   }
   

   package factoryPattern.simple;
   
   public class ShapeFactory{
       public static final String TAG ="ShapeFactory";
       public static Shape getShape(String type){
           if(type.equals("circle")){
               return new CircleShape();
           }
           else if(type.equals("rect")){
               return new RectShape();
           }
           else{
               return new TangleShape();
           }
           
       }
   }
   

   package factoryPattern.simple;
   
   public class Test {
   
       public static void main(String[] args) {
           Shape rectShape = ShapeFactory.getShape("rect");
           rectShape.draw();
   
           Shape circleShape = ShapeFactory.getShape("circle");
           circleShape.draw();
   
           Shape tangleShape = ShapeFactory.getShape("tangle");
           tangleShape.draw();
   
       }
       
   }
   

2. 工厂方法模式

   每个对象都有一个与之对应的工厂

   

   package factoryPattern.factoryMethod;
   
   public interface Read {
       void read();
   }
   

   package factoryPattern.factoryMethod;
   
   public class PngRead implements Read{
       @Override
       public void read() {
           System.out.println("读取Png格式图片");
       }
       
   }
   

   package factoryPattern.factoryMethod;
   
   public class JpgRead implements Read{
       @Override
       public void read() {
           System.out.println("读取Jpg图片");
       }
       
   }
   

   package factoryPattern.factoryMethod;
   
   public interface ReadFactory {
       Read getRead();
       
   }
   

   package factoryPattern.factoryMethod;
   public class GifGetReadFactory implements ReadFactory{
       @Override
       public Read getRead() {
           return new GifRead();
       }
       
   }
   

   package factoryPattern.factoryMethod;
   
   public class PngGetReadFactory implements ReadFactory{
       @Override
       public Read getRead() {
           return new PngRead();
       }
       
   }
   

   package factoryPattern.factoryMethod;
   
   public class JpgGetReadFactory implements ReadFactory{
       @Override
       public Read getRead() {
           return new JpgRead();
       }
       
   }
   

   package factoryPattern.factoryMethod;
   
   public class Test {
       public static void main(String[] args) {
           ReadFactory jpgread = new JpgGetReadFactory();
           Read jRead =jpgread.getRead();
           jRead.read();
           ReadFactory pngread =new PngGetReadFactory();
           Read pRead =pngread.getRead();
           pRead.read();
           ReadFactory gifread =new GifGetReadFactory();
           Read gRead =gifread.getRead();
           gRead.read();
       }
   }
   

3. 抽象工厂模式

   提供一个创建一系列相关或相互依赖对象的接口，而无须指定它们具体的类
   

   package factoryPattern.abstractFactory;
   
   public interface operationController {
       void control();
       
   }
   

   package factoryPattern.abstractFactory;
   
   public interface UiController {
       void display();
       
   }
   

   package factoryPattern.abstractFactory;
   
   public class AndoridOperationFactroy implements operationController{
       @Override
       public void control() {
           System.out.println("Andorid平台操作");
       }
       
   }
   

   package factoryPattern.abstractFactory;
   
   public class AndoridUIController implements UiController{
       @Override
       public void display() {
           System.out.println("Andorid界面");
       }
   }
   

   package factoryPattern.abstractFactory;
   
   public class iosOperationFactory implements operationController{
       @Override
       public void control() {
           System.out.println("ios平台操作");
       }
   }
   

   package factoryPattern.abstractFactory;
   
   public class iosUIController implements UiController{
       @Override
       public void display() {
           System.out.println("ios界面");
       }
   }
   

   package factoryPattern.abstractFactory;
   
   public class WpOperationFactroy implements operationController{
       @Override
       public void control() {
           System.out.println("window平台操作");
       }
       
   }
   

   package factoryPattern.abstractFactory;
   
   public class WpUIController implements UiController{
       @Override
       public void display() {
           System.out.println("window界面");
       }
   }
   

   package factoryPattern.abstractFactory;
   
   public class WpUIController implements UiController{
       @Override
       public void display() {
           System.out.println("window界面");
       }
   }
   

   package factoryPattern.abstractFactory;
   
   public interface SystemFactory {
       public operationController cOperationController();
       public UiController cUiController();
   }
   

   package factoryPattern.abstractFactory;
   
   public class AndoridFactory implements SystemFactory{
   
       @Override
       public operationController cOperationController() {
           return new AndoridOperationFactroy();
       }
   
       @Override
       public UiController cUiController() {
           return new AndoridUIController();
       }
       
   }
   

   package factoryPattern.abstractFactory;
   
   public class iosFactory implements SystemFactory{
       @Override
       public operationController cOperationController() {
           return new iosOperationFactory();
       }
       @Override
       public UiController cUiController() {
           return new iosUIController();
       }
   }
   

   package factoryPattern.abstractFactory;
   
   public class WpFactor implements SystemFactory{
       @Override
       public operationController cOperationController() {
           return new WpOperationFactroy();
       }
       @Override
       public UiController cUiController() {
           return new iosUIController();
       }
       
   }
   

   package factoryPattern.abstractFactory;
   
   public class AndoridFactory implements SystemFactory{
   
       @Override
       public operationController cOperationController() {
           return new AndoridOperationFactroy();
       }
   
       @Override
       public UiController cUiController() {
           return new AndoridUIController();
       }
       
   }
   

   package factoryPattern.abstractFactory;
   
   public class iosFactory implements SystemFactory{
       @Override
       public operationController cOperationController() {
           return new iosOperationFactory();
       }
       @Override
       public UiController cUiController() {
           return new iosUIController();
       }
   }
   

   package factoryPattern.abstractFactory;
   
   public class WpFactor implements SystemFactory{
       @Override
       public operationController cOperationController() {
           return new WpOperationFactroy();
       }
       @Override
       public UiController cUiController() {
           return new iosUIController();
       }
       
   }
   

   package factoryPattern.abstractFactory;
   
   public class Test {
       public static void main(String[] args) {
           SystemFactory systemFactory;
           UiController uiController;
           operationController operationcontroller;
   
           systemFactory = new AndoridFactory();
   
           uiController = systemFactory.cUiController();
           operationcontroller= systemFactory.cOperationController();
           uiController.display();
           operationcontroller.control();
       }
       
   }