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原则：依赖倒转原则：针对接口编程，依赖于抽象而不依赖于具体；
一、创建接口：发送消息
package Factory; public interface Sender{ public void Send(); }
二、创建两个实现类
1、发送邮箱
package Factory; public class MailSend implements Sender{ @Override public void Send() { System.out.println("mailsend"); } }
2、发送短信
package Factory; public class SMSSend implements Sender{ @Override public void Send() { // TODO Auto-generated method stub System.out.println("SMSSender"); } }
三、创建工厂类
package Factory; public class Sendfactory { public Sender produce(String type){ if("mail".equals(type)){ return new MailSend(); }else if("sms".equals(type)){ return new SMSSend(); }else{ System.out.println("请输入正确参数"); return null; } } }
四、应用场景类
package Factory; public class FactoryTest { public static void main(String[] args) { // TODO Auto-generated method stub Sendfactory factory = new Sendfactory(); Sender send = factory.produce("sms"); send.Send(); } }
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原文地址：http://www.cnblogs.com/pingzhanga/p/4673637.html
