简单工厂

最新推荐文章于 2022-03-28 17:38:51 发布

原创最新推荐文章于 2022-03-28 17:38:51 发布 · 198 阅读

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Test类

package com.qf.e_factory;


/**
 * 简单工厂
 * 1.静态工厂---Factory.静态方法()
 * 2.实例工厂---
 * 
 * @author Zhouzilong
 * @date 2019年8月13日
 */
public class Test {
    public static void main(String[] args) {
        //-----1.静态工厂-------
        Animal animal = Factory.getAnimal(Factory.DOG_TYPE);
        System.out.println(animal);
        
        animal = Factory.getAnimal(Factory.PIG_TYPE);
        System.out.println(animal);
        
        //-----2.简单工厂-------
        Factory factory = new Factory();
        animal = factory.getAnimal2(Factory.DOG_TYPE);
        System.out.println(animal);
        
        animal = factory.getAnimal2(Factory.PIG_TYPE);
        System.out.println(animal);
    }
}

Factory类

（Animal类，Dog类和Pig类没有内容就没复制上来）

package com.qf.e_factory;

public class Factory {
    public static final int PIG_TYPE = 0;
    public static final int DOG_TYPE = 1;
	
	//静态工厂
    public static Animal getAnimal(int type) {
        switch (type) {
        case PIG_TYPE:
            return new Pig();
        case DOG_TYPE:
            return new Dog();
        default:
            return null;
        }
    }

	//实例工厂
    public Animal getAnimal2(int type) {
        switch (type) {
        case PIG_TYPE:
            return new Pig();
        case DOG_TYPE:
            return new Dog();
        default:
            return null;
        }
    }
}