工厂模式定义：提供创建对象的接口public class Factory{
public static Sample creator(int which){
//getClass 产生Sample 一般可使用动态类装载装入类。 if (which==1) return new SampleA(); else if (which==2) return new SampleB(); } }
如果要实例化Sample时.就使用
Sample sampleA=Factory.creator(1);
在工厂类上进行拓展，工厂类也有继承它的实现类concreteFactorypublic abstract class Factory{
public abstract Sample creator();
public abstract Sample2 creator(String name);
}
public class SimpleFactory extends Factory{
public Sample creator(){ ......... return new SampleA }
public Sample2 creator(String name){ ......... return new Sample2A }
}
public class BombFactory extends Factory{
public Sample creator(){ ...... return new SampleB }
public Sample2 creator(String name){ ...... return new Sample2B }
}
