普通工厂

Factorypublic calss SenderFactory{    //根据具体类型创建对象    public sender getInstance(String type){        if(\"email\".equals(type))){             return new EmailSender();             }else if(\"sms\".equals(type))){             return new SmsSender();        }else{            Systems.out.println(\"请输入具体类型才有对应对象\")                }        }

InterfaceAPIpublic interface Sender {    public void Send();}

ImplBpublic interface Sender {    public void Send();}

ImplApublic interface Sender {    public void Send();}

Clientpublic static void main(String[] args){}