基于Struts+Spring+JDBC架构的课程设计实训教学示例项目——《网上银行账户管理系统》——在项目中实现对XML文件进行解析的各种功能

1、基于Struts+Spring+JDBC架构的课程设计实训教学示例项目网上银行账户管理系统在项目中实现对XML文件进行解析的各种功能在项目中实现对XML文件进行解析的各种功能1、添加一个对XML进行解析的JavaBean组件的接口及实现类（1）接口名称为XMLInformationConfig，包名称为（2）设计该接口package com.px1987.webbank.util;import com.px1987.webbank.exception.*;public interface XMLInformationConfig public void xmlInit(String confi

2、gFilePathAndName) throws WebBankException;2、为上面的接口提供一个实现类（1）添加SAXInformationConfig类类名称为SAXInformationConfig，包名称为，基类为tHandler（采用SAX技术）。（2）编程该SAXInformationConfig类package com.px1987.webbank.util;import org.xml.sax.helpers.DefaultHandler;import com.px1987.webbank.exception.WebBankException;import java.

3、io.*;import org.xml.sax.Attributes;ion;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;public class SAXInformationConfig extends DefaultHandler implements XMLInformationConfigprivate String marqueeText = ;public String getMarqueeText()return marqueeText;public SAXInforma

4、tionConfig()/* * 读取配置文件信息，并设置相关参数。 * param configFileName String 配置文件路径及文件名。 */public void xmlInit(String configFilePathAndName) throws WebBankExceptionSAXParserFactory saxParserFactory = null;SAXParser saxParser = null;saxParserFactory = SAXParserFactory.newInstance(); /获取SAX工厂对象saxParserFactory.se

5、tNamespaceAware(false);saxParserFactory.setValidating(false);trysaxParser = saxParserFactory.newSAXParser(); /创建出SAX解析/*将解析器和解析对象XMLDOMData.xml联系起来,同时指定事件回调方法的对象开始解析*/saxParser.parse(new File(configFilePathAndName), this);catch (javax.xml.parsers.ParserConfigurationException pe)throw new WebBankExce

6、ption(在SAXInformationConfig类中的xmlInit方法中出现ParserConfigurationException);catch (SAXException se)throw new WebBankException(在SAXInformationConfig类中的xmlInit方法中出现SAXException);catch (java.io.IOException ioe)throw new WebBankException(在SAXInformationConfig类中的xmlInit方法中出现IOException);catch (Exception ex)t

7、hrow new WebBankException(在SAXInformationConfig类中的xmlInit方法中出现Exception);finallysaxParserFactory = null;saxParser = null;private String tagElementName = null;/定义开始解析元素的方法. 这里是将中的名称xxx提取出来.public void startElement(String uri, String localName, String qName, Attributes attributes)throws SAXExceptionth

8、is.tagElementName = qName; /获得该标签的名称/这里是将之间的标签体的值加入到currentValuepublic void characters(char ch, int start, int length) throws SAXExceptionString tagBodyText = new String(ch, start, length); /获得标签体的文字串内容if (this.tagElementName.equals(marquee-text) & !tagBodyText.trim().equals()marqueeText = tagBodyTe

9、xt;3、为SAXInformationConfig实现类提供一个工厂类XMLInformationConfigFactory（1）用来统一创建XMLInformationConfig接口的对象实例名称为XMLInformationConfigFactory类，包名称为 ，并且从类继承。（2）编程该XMLInformationConfigFactory类package com.px1987.webbank.factory;import java.util.Observable;import com.px1987.webbank.config.ClassNameConfig;ebbank.exc

10、eption.WebBankException;import com.px1987.webbank.util.*;public class XMLInformationConfigFactory extends Observable public XMLInformationConfigFactory() public XMLInformationConfig newXMLInformationConfigBean(String xmlInformationConfigImpleClassName) throws WebBankExceptionXMLInformationConfig one

11、XMLInformationConfigImple=null;Class oneClass=null;try oneClass = Class.forName(xmlInformationConfigImpleClassName); catch (ClassNotFoundException e)int logImpleKind=Integer.parseInt(ClassNameConfig.getProperty(logImpleKind);this.addObserver(LogInfoFactory.newLogInstance(logImpleKind);this.setChange

12、d(); /注意要设置变化点notifyObservers(e);/当出现异常时将通知各个观察者throw new WebBankException(不能正确地获得+xmlInformationConfigImpleClassName+类);try oneXMLInformationConfigImple = (XMLInformationConfig)oneClass.newInstance(); catch (InstantiationException e)int logImpleKind=Integer.parseInt(ClassNameConfig.getProperty(logI

13、mpleKind);this.addObserver(LogInfoFactory.newLogInstance(logImpleKind);this.setChanged(); /注意要设置变化点notifyObservers(e);/当出现异常时将通知各个观察者throw new WebBankException(不能正确地创建+xmlInformationConfigImpleClassName+类的对象实例); catch (IllegalAccessException e)int logImpleKind=Integer.parseInt(ClassNameConfig.getPro

14、perty(logImpleKind);this.addObserver(LogInfoFactory.newLogInstance(logImpleKind);this.setChanged(); /注意要设置变化点notifyObservers(e);/当出现异常时将通知各个观察者throw new WebBankException(不能正确地创建+xmlInformationConfigImpleClassName+类的对象实例);return oneXMLInformationConfigImple;4、修改classNameConfig.xml文件以添加对SAXInformation

15、Config类的定义sName5、在WebBankListener类中对上面的SAXInformationConfig类进行使用package com.px1987.webbank.listener;import java.util.ArrayList;import java.util.List;import java.util.Timer;import javax.servlet.ServletContext;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;import

16、javax.servlet. . SessionAttributeListener;import javax.servlet. . SessionBindingEvent;import javax.servlet. . SessionEvent;import javax.servlet. . SessionListener;import com.px1987.webbank.config.ClassNameConfig;import com.px1987.webbank.exception.WebBankException;import com.px1987.webbank.factory.X

17、MLInformationConfigFactory;import com.px1987.webbank.model.vo.UserInfoVO;import com.px1987.webbank.util.OnLineCounter;import com.px1987.webbank.util.WebBankScheduleTask;import com.px1987.webbank.util.XMLInformationConfig;public class WebBankListener implements SessionListener, SessionAttributeListen

18、er, ServletContextListener private String saxXMLPathAndFileName=null;private static List onLineUserList=new ArrayList();/当在线人员数比较多时,开销比较大!private ServletContext oneServletContext=null;public void sessionCreated( SessionEvent arg0) /某用户访问，将增加访问计数总数OnLineCounter.addOneUser();public void sessionDestroy

19、ed( SessionEvent arg0) OnLineCounter.reduceOneUser();/某用户离线，将减少访问计数总数public void attributeAdded( SessionBindingEvent SessionBindingEvent)/识别该用户是否已经登录if( SessionBindingEvent.getName().equals(oneUserInfoVO)UserInfoVO nowLoginUserInfo=(UserInfoVO) SessionBindingEvent.getValue();onLineUserList.add(nowLo

20、ginUserInfo);/* * 一旦该用户登陆成功，将减少“游客”的计数 */ Integer onLineGuest=(Integer)oneServletContext.getAttribute(onLineGuest);int onLineGuestDigit=onLineGValue();oneServletContext.setAttribute(onLineGuest,new Integer(onLineGuestDigit-1)=0?(onLineGuestDigit-1):0);public void attributeRemoved( SessionBindingEven

21、t SessionBindingEvent)if( SessionBindingEvent.getName().equals(oneUserInfoVO)UserInfoVO nowLoginUserInfo=(UserInfoVO) SessionBindingEvent.getValue();onLineUserList.remove(nowLoginUserInfo);/除掉该登陆用户的信息public void attributeReplaced( SessionBindingEvent SessionBindingEvent)public static List getOnLineU

22、serList()return onLineUserList;public void contextDestroyed(ServletContextEvent arg0) scheduletimer.cancel();private Timer scheduletimer = null;public void contextInitialized(ServletContextEvent arg0) oneServletContext=arg0.getServletContext(); XMLInformationConfig xmlSaxInfoBeanID=null;saxXMLPathAn

23、dFileName=oneServletContext.getInitParameter(saxXMLPathAndFileName); String saxXMLFileName=oneServletContext.getRealPath()+saxXMLPathAndFileName; try String xmlInformationConfigImpleClassName=ClassNameConfig.getProperty(xmlInformationConfigImple.className); xmlSaxInfoBeanID=new XMLInformationConfigFactory().newXMLInformationConfigBean(xmlInformationConfigImpleClassName); catch(WebBankException e) e.printStackTrace(); try xmlSaxInfoBeanID.xmlInit(saxXMLFileName); catch (WebBankException e) e.printStackTrace(); System.out.println(在WebBankListener类中的contextInitialized方法出现了We