标签：null   shutdown   phone   return   erp   void   sys   str   art   

[设计模式]工厂模式

一、简单工厂模式（静态工厂模式）

• 车的接口

  public interface Car {
      void name();
  }
  

• 车接口的三个实现类

  public class BYD implements Car{
      @Override
      public void name() {
          System.out.println("比亚迪！");
      }
  }
  

  public class NIO implements Car{
      @Override
      public void name() {
          System.out.println("蔚来！");
      }
  }
  

  public class Tesla implements Car{
      @Override
      public void name() {
          System.out.println("特斯拉！");
      }
  }
  

• 车工厂类

  public class CarFactory {
      public static Car getCar(String car){
          if (car.equals("比亚迪")) {
              return new BYD();
          }else if(car.equals("特斯拉")){
              return new Tesla();
          }else if(car.equals("蔚来")){
              return new NIO();
          }
          else {
              return null;
          }
      }
  }
  

• 程序入口

  public class Me {
      public static void main(String[] args) {
          Car car = CarFactory.getCar("比亚迪");
          Car car2 = CarFactory.getCar("特斯拉");
          Car car3 = CarFactory.getCar("蔚来");
  
          car.name();
          car2.name();
          car3.name();
      }
  }
  

• 运行结果

  特斯拉！
  蔚来！
  比亚迪！
  

二、工厂方法模式

• 车的接口

  public interface Car {
      void name();
  }
  

• 车接口的三个实现类

  public class BYD implements Car{
      @Override
      public void name() {
          System.out.println("比亚迪！");
      }
  }
  

  public class NIO implements Car{
      @Override
      public void name() {
          System.out.println("蔚来！");
      }
  }
  

  public class Tesla implements Car{
      @Override
      public void name() {
          System.out.println("特斯拉！");
      }
  }
  

• 车工厂接口

  public interface CarFactory {
      Car getCar();
  }
  

• 车工厂接口的三个实现类

  public class BYDFactory implements  CarFactory{
      @Override
      public Car getCar() {
          return new BYD();
      }
  }
  

  public class NIOFactory implements CarFactory{
  
  
      @Override
      public Car getCar() {
          return new NIO();
      }
  }
  

  public class TeslaFactory implements CarFactory {
      @Override
      public Car getCar() {
          return new Tesla();
      }
  }
  

• 程序入口

  public class Me {
      public static void main(String[] args) {
          Car car1 = new TeslaFactory().getCar();
          Car car2 = new NIOFactory().getCar();
          Car car3 = new BYDFactory().getCar();
  
          car1.name();
          car2.name();
          car3.name();
      }
  }
  

• 运行结果

  特斯拉！
  蔚来！
  比亚迪！
  

三、抽象工厂模式

• 手机产品接口

  public interface PhoneProduct {
      void start();
      void shutdown();
      void callup();
      void sendSMS();
  }
  

• 路由器产品接口

  public interface RouterProduct {
      void start();
      void shutdown();
      void openWifi();
      void setting();
  }
  

• 手机产品接口的两个实现类

  public class XiaomiPhone implements PhoneProduct {
      public void start() {
          System.out.println("开启小米手机");
      }
  
      @Override
      public void shutdown() {
          System.out.println("关闭小米手机");
      }
  
      @Override
      public void callup() {
          System.out.println("小米手机打电话");
      }
  
      @Override
      public void sendSMS() {
          System.out.println("小米手机发短信");
      }
  }
  

  public class HuaweiPhone implements PhoneProduct {
      @Override
      public void start() {
          System.out.println("开启华为手机");
      }
  
      @Override
      public void shutdown() {
          System.out.println("关闭华为手机");
      }
  
      @Override
      public void callup() {
          System.out.println("华为手机打电话");
      }
  
      @Override
      public void sendSMS() {
          System.out.println("华为手机发短信");
      }
  }
  

• 路由器产品的两个实现类

  public class XiaomiRouter implements RouterProduct {
      @Override
      public void start() {
          System.out.println("小米路由器启动");
      }
  
      @Override
      public void shutdown() {
          System.out.println("小米路由器关闭");
      }
  
      @Override
      public void openWifi() {
          System.out.println("小米路由器开启WiFi");
      }
  
      @Override
      public void setting() {
          System.out.println("设置小米路由器");
      }
  }
  

  public class HuaweiRouter implements RouterProduct {
      @Override
      public void start() {
          System.out.println("华为路由器启动");
      }
  
      @Override
      public void shutdown() {
          System.out.println("华为路由器关闭");
      }
  
      @Override
      public void openWifi() {
          System.out.println("华为路由器开启WiFi");
      }
  
      @Override
      public void setting() {
          System.out.println("设置华为路由器");
      }
  }
  

• 产品工厂接口

  public interface ProductFactory {
  
      //生产手机
      PhoneProduct iphoneProduct();
  
      //生产路由器
      RouterProduct routerProduct();
      
  }
  

• 产品工厂接口的两个实现类

  public class XiaomiFactory implements ProductFactory {
      @Override
      public PhoneProduct iphoneProduct() {
          return new XiaomiPhone();
      }
  
      @Override
      public RouterProduct routerProduct() {
          return new XiaomiRouter();
      }
  }
  

  public class HuaiweiFactory implements ProductFactory {
      @Override
      public PhoneProduct iphoneProduct() {
          return new HuaweiPhone();
      }
  
      @Override
      public RouterProduct routerProduct() {
          return new HuaweiRouter();
      }
  }
  

• 程序入口

  public class Client {
  
      public static void main(String[] args) {
  
          System.out.println("-------------小米------------------");
          //小米工厂
          XiaomiFactory xiaomiFactory = new XiaomiFactory();
  
          //生产小米手机
          PhoneProduct xiaomiPhone = xiaomiFactory.iphoneProduct();
          xiaomiPhone.callup();
          xiaomiPhone.sendSMS();
  
          //生产小米路由器
          RouterProduct xiaomiRouter = xiaomiFactory.routerProduct();
          xiaomiRouter.openWifi();
          xiaomiRouter.setting();
  
          System.out.println("-------------华为------------------");
  
          HuaiweiFactory huaiweiFactory = new HuaiweiFactory();
  
          PhoneProduct huaweiPhone = huaiweiFactory.iphoneProduct();
          huaweiPhone.callup();
          huaweiPhone.start();
  
          RouterProduct huaweiRouter = huaiweiFactory.routerProduct();
          huaweiRouter.setting();
          huaweiRouter.shutdown();
      }
  }
  

• 运行结果

  -------------小米------------------
  小米手机打电话
  小米手机发短信
  小米路由器开启WiFi
  设置小米路由器
  -------------华为------------------
  华为手机打电话
  开启华为手机
  设置华为路由器
  华为路由器关闭
  

[设计模式]工厂模式

标签：null   shutdown   phone   return   erp   void   sys   str   art   

原文地址：https://www.cnblogs.com/baihan/p/12996969.html