外观模式（Facade Pattern）门面模式，隐藏系统的复杂性，并向客户端提供了一个客户端可以访问系统的接口。这种类型的设计模式属于结构型模式，它向现有的系统添加一个接口，来隐藏系统的复杂性。
这种模式涉及到一个单一的类，该类提供了客户端请求的简化方法和对现有系统类方法的委托调用。
用户注册完之后，需要调用阿里短信接口、邮件接口、微信推送接口。
public interface EamilSmsService { public void sendSms(); } public class EamilSmsServiceImpl implements EamilSmsService{ public void sendSms() { System.out.println("发送邮件消息"); } }
//微信消息推送 public interface WeiXinSmsService { public void sendSms(); } public class EamilSmsServiceImpl implements EamilSmsService{ @Override public void sendSms() { System.out.println("发送邮件消息"); } }
//阿里短信消息 public interface AliSmsService { public void sendSms(); } public class AliSmsServiceImpl implements AliSmsService { @Override public void sendSms() { System.out.println("支付宝发送消息..."); } }
门面类
public class Computer { AliSmsService aliSmsService; EamilSmsService eamilSmsService; WeiXinSmsService weiXinSmsService; public Computer() { aliSmsService = new AliSmsServiceImpl(); eamilSmsService = new EamilSmsServiceImpl(); weiXinSmsService = new WeiXinSmsServiceImpl(); } public void sendMsg() { aliSmsService.sendSms(); eamilSmsService.sendSms(); weiXinSmsService.sendSms(); } }
public class Client { public static void main(String[] args) { // AliSmsService aliSmsService= new AliSmsServiceImpl(); // EamilSmsService eamilSmsService= new EamilSmsServiceImpl(); // WeiXinSmsService weiXinSmsService= new WeiXinSmsServiceImpl(); // aliSmsService.sendSms(); // eamilSmsService.sendSms(); // weiXinSmsService.sendSms(); new Computer().sendMsg(); } }
原文：https://www.cnblogs.com/senhelpa-vivo/p/12071496.html