结构型模式-适配器模式

　　有两种适配器模式：类的适配器和对象的适配器

　　类的适配器是继承要适配的类，对象的适配器是关联要适配的类的对象，类的适配器继承了要适配的类，就不能继承其它类了，而对象的适配器不但能继承其它类，还能适配其子类，所以觉得对象的适配器适用范围要大一些，下面就说说对象的适配器模式

　　一个人到德国旅行，带了个国标的充电器，但德国要用德标的充电器，所以他又带了一个适配器

package constructional.pattern.adapter; public interface DBSocketInterface { void output(); } package constructional.pattern.adapter; public class DBSocket implements DBSocketInterface { @Override public void output() { System.out.println("two round Angle output current, charge German equipment."); } } package constructional.pattern.adapter; public interface GBSocketInterface { void output(); } package constructional.pattern.adapter; public class GBSocket implements GBSocketInterface { @Override public void output() { System.out.println("three plat angle output current. charge China equipment."); } } package constructional.pattern.adapter; public class SocketAdapter implements DBSocketInterface { private GBSocketInterface gBSocketInterface; public SocketAdapter(GBSocketInterface gBSocketInterface) { this.gBSocketInterface = gBSocketInterface; } @Override public void output() { System.out.println("insert into two round hole and three plat" + " angle can be inserted to output current."); gBSocketInterface.output(); } } package constructional.pattern.adapter; public class Hotel { private DBSocketInterface dbSocketInterface; public Hotel(DBSocketInterface dbSocketInterface) { super(); this.dbSocketInterface = dbSocketInterface; } public void charge() { dbSocketInterface.output(); } }

　　适配器继承了德标的接口，但用来适配国标的充电器，即把国标的充电器和德标的标准结合起来

　　下面看一下测试代码

package constructional.pattern.adapter; public class TestSocketClass { public static void main(String[] args) { // 1.德国电器 DBSocketInterface dbSocket = new DBSocket(); Hotel hotel = new Hotel(dbSocket); hotel.charge(); System.out.println("----------------------------------------------------------------"); // 2.中国电器 GBSocketInterface gBSocket = new GBSocket(); SocketAdapter socketAdapter = new SocketAdapter(gBSocket); Hotel hotel2 = new Hotel(socketAdapter); hotel2.charge(); } }

　　运行结果如下

 

转载于:https://www.cnblogs.com/liunianfeiyu/p/10115081.html