java – 工厂模式动态方法

像下面的例子,如果让我们假设狗鸭正在实施宠物界面,如果许多动物实现宠物界面,我的工厂会很长时间,如果有其他的代码或开关案例,那么明天.有什么办法可以用更多的动态方法解决这个问题吗？

package com.javapapers.sample.designpattern.factorymethod;

//Factory method pattern implementation that instantiates objects based on logic
public class PetFactory {

    public Pet getPet(String petType) {
        Pet pet = null;

        // based on logic factory instantiates an object
        if ("bark".equals(petType))
            pet = new Dog();
        else if ("quack".equals(petType))
            pet = new Duck();
        return pet;
    }

如果动物生长

if ("bark".equals(petType))
    pet = new Dog();
else if ("quack".equals(petType))
    pet = new Duck();
else if ("mno".equals(petType))
    pet = new MNO();
else if ("jkl".equals(petType))
    pet = new JKL();
else if ("ghi".equals(petType))
    pet = new GHI();
else if ("def".equals(petType))
    pet = new DEF();
......
else if ("abc".equals(petType))
    pet = new ABC();
return pet