java设计模式之工厂方法模式

public interface Sender {
 
 public void Send();
 
}

public class MailSender implements Sender {
 @Override
 public void Send() {
  System.out.println("this is mailsender!");
 }
}

public class SmsSender implements Sender {
 @Override
 public void Send() {
  System.out.println("this is sms sender!");
 }
}

public class SendFactory {
 
 public Sender produce(String type) {
  if ("mail".equals(type)) {
   return new MailSender();
  } else if ("sms".equals(type)) {
   return new SmsSender();
  } else {
   System.out.println("请输入正确的类型!");
   return null;
  }
 }
}

public class FactoryTest {
 
 public static void main(String[] args) {
  SendFactory factory = new SendFactory();
  Sender sender = factory.produce("sms");
  sender.Send();
 }
}

public class SendFactory {
 
 public Sender produceMail(){
  return new MailSender();
 }
 
 public Sender produceSms(){
  return new SmsSender();
 }
}

public class FactoryTest {
 
 public static void main(String[] args) {
  SendFactory factory = new SendFactory();
  Sender sender = factory.produceMail();
  sender.Send();
 }

public class SendFactory {
 
 public static Sender produceMail(){
  return new MailSender();
 }
 
 public static Sender produceSms(){
  return new SmsSender();
 }
}

public class FactoryTest {
 
 public static void main(String[] args) { 
  Sender sender = SendFactory.produceMail();
  sender.Send();
 }
}