工厂设计模式--简单工厂、抽象工厂、工厂方法

向右看齐 2022-05-04 09:57 365阅读 0赞

### 简单工厂模式 ###

public interface Car {
    	public void drive();
    }
    
    public class Benz implements Car {
    	public void drive() {
    		System.out.println("今天我开奔驰");
    	}
    }
    
    public class BMW implements Car {
    	public void drive() {
    		System.out.println("今天我开宝马");
    	}
    }
    
    public class Driver {
            public static Car driverCar(String c) {
                    if(c.equalsIgnoreCase("Benz")) {
                            return new Benz(); 
                    }else if(c.equalsIgnoreCase("BMW")){
                            return new BMW();
                    }
                    return null;
            }
    }
    
    public static void main(String[] args) {
    	Car car=Driver.driverCar("benz");
    	car.drive();
    }

console：今天我开奔驰

### 工厂方法 ###

interface IProduct {
            public void productMethod();
    }
     
    class Product implements IProduct {
            public void productMethod() {
                    System.out.println("产品");
            }
    }
     
    interface IFactory {
            public IProduct createProduct();
    }
     
    class Factory implements IFactory {
            public IProduct createProduct() {
                    return new Product();
            }
    }
     
    public class Client {
            public static void main(String[] args) {
                    IFactory factory = new Factory();
                    IProduct prodect = factory.createProduct();
                    prodect.productMethod();
            }
    }

![抽象工厂][70]

### 抽象工厂 ###

interface IProduct1 {
            public void show();
    }
    interface IProduct2 {
            public void show();
    }
     
    class Product1 implements IProduct1 {
            public void show() {
                    System.out.println("这是1型产品");
            }
    }
    class Product2 implements IProduct2 {
            public void show() {
                    System.out.println("这是2型产品");
            }
    }
     
    interface IFactory {
            public IProduct1 createProduct1();
            public IProduct2 createProduct2();
    }
    class Factory implements IFactory{
            public IProduct1 createProduct1() {
                    return new Product1();
            }
            public IProduct2 createProduct2() {
                    return new Product2();
            }
    }
     
    public class Client {
            public static void main(String[] args){
                    IFactory factory = new Factory();
                    factory.createProduct1().show();
                    factory.createProduct2().show();
            }
    }

console：这是1型产品

[70]: /images/20220504/b8c893bb46f948669aa6856e0a6462f2.png