设计模式-软件体系结构-实验6-中南大学-软件学院

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public interface InvesterObserver { void update(); } import java.util.ArrayList; public abstract class StockSubject { protected ArrayList observerList = new ArrayList(); public void attach(InvesterObserver observer) { observerList.add(observer); } public void detach(InvesterObserver observer) { observerList.remove(observer); } public abstract void notice(); } package util; import java.io.File; import java.io.IOException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; AAAAAA

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import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; public class XMLUtil { public static Object getBean (String tagName) { try { //创建DOM文档对象 DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docFactory.newDocumentBuilder(); Document document = docBuilder.parse(new File(\ //获取包含类名的 文本节点 NodeList nl = document.getElementsByTagName(tagName); Node classNode = nl.item(0).getFirstChild(); String className = classNode.getNodeValue(); //通过类名生成实例对象并将其返回 @SuppressWarnings(\Class clazz = Class.forName(className); Object obj = clazz.newInstance(); return obj; } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); AAAAAA

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} Stock Invester } } catch (InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { } return null; e.printStackTrace();

2. 类图：

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MySubject#+++{abstract} observerList: ArrayListattach (MyObserver myObserver): voiddetach (MyObserver myObserver): voidwarning (): void...Thermosensor+<>warning (): void...MyObserver+update (): void...CautionLightAdapter+update (): void...CautionLight+flicker (): void...AnnunciatorAdapter+update (): void...SecurityDoorAdapter+update (): void...SecurityDoor+open (): void...InsulatedDoorAdapter+update (): void...Annunciator+alarm (): void...InsulatedDoor+close (): void ... 实现代码：

public class Client { public static void main(String[] args) { MySubject subject = new Thermosensor(); MyObserver cautionLight = new CautionLightAdapter(); MyObserver annunciator = new AnnunciatorAdapter(); MyObserver securityDoor = new SecurityDoorAdapter(); MyObserver insulatedDoor = new InsulatedDoorAdapter(); subject.attach(cautionLight); subject.attach(annunciator); subject.attach(securityDoor); subject.attach(insulatedDoor); subject.warning(); } } import java.util.ArrayList; AAAAAA