大家好,又见面了,我是你们的朋友全栈君。
public class Adapter extends Adaptee implements Target { public void request() { specificRequest(); } }
public class Adapter extends Target { private Adaptee adaptee; public Adapter(Adaptee adaptee) { this.adaptee=adaptee; } public void request() { adaptee.specificRequest(); } }
public class Bird
{
public void tweedle()
{
System.out.println("鸟儿叽叽叫!");
}
public void fly()
{
System.out.println("鸟儿快快飞!");
}
}
2.BirdAdapter.java
public class BirdAdapter extends Bird implements Robot
{
public void cry()
{
System.out.print("机器人模仿:");
super.tweedle();
}
public void move()
{
System.out.print("机器人模仿:");
super.fly();
}
}
3.Client.java
public class Client
{
public static void main(String args[])
{
Robot robot=(Robot)XMLUtil.getBean();
robot.cry();
robot.move();
}
}
4.Dog.java
public class Dog
{
public void wang()
{
System.out.println("狗汪汪叫!");
}
public void run()
{
System.out.println("狗快快跑!");
}
}
5.DogAdapter.java
public class DogAdapter extends Dog implements Robot
{
public void cry()
{
System.out.print("机器人模仿:");
super.wang();
}
public void move()
{
System.out.print("机器人模仿:");
super.run();
}
}
6.Robot.java
public interface Robot
{
public void cry();
public void move();
}
7.XMLUtil.java
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;
import java.io.*;
public class XMLUtil
{
//该方法用于从XML配置文件中提取具体类类名,并返回一个实例对象
public static Object getBean()
{
try
{
//创建文档对象
DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = dFactory.newDocumentBuilder();
Document doc;
doc = builder.parse(new File("config.xml"));
//获取包含类名的文本节点
NodeList nl = doc.getElementsByTagName("className");
Node classNode=nl.item(0).getFirstChild();
String cName=classNode.getNodeValue();
//通过类名生成实例对象并将其返回
Class c=Class.forName(cName);
Object obj=c.newInstance();
return obj;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
}
}
8.config.xml
<?xml version="1.0"?>
<config>
<className>BirdAdapter</className>
</config>
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