面试题复习-常用设计模式-简单工厂模式

Posted 2022-05-27 caizhiqin

手写一个简单工厂模式

产品接口：

package com.ajax.pattern.simplefactory;

public interface Fruit 
    void desc();

产品1：

package com.ajax.pattern.simplefactory;

public class Apple implements Fruit 
    @Override
    public void desc() 
        System.out.println("苹果");
    

产品2：

package com.ajax.pattern.simplefactory;

public class Orange implements Fruit 
    @Override
    public void desc() 
        System.out.println("橙子");
    

工厂：

package com.ajax.pattern.simplefactory;

public class SimpleFactory 
    public static Fruit getFruit(String name) 
        switch (name) 
            case "apple":
                return new Apple();
            case "orange":
                return new Orange();
            default:
                return null;
        
    

运行：

package com.ajax.pattern.simplefactory;

public class Run 
    public static void main(String[] args) 
        SimpleFactory.getFruit("apple").desc();