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<listener>
<listener-class>packname.classname</listener-class>
</listener>
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OnLineDemo.java
package demo;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
/*
* <listener> <listener-class>demo.OnLineDemo</listener-class>
* </listener>
*/
public class OnlineDemo implements ServletContextListener, HttpSessionListener,
HttpSessionAttributeListener {
// ÉùÃ÷Ò»¸öServletContext¶ÔÏó
private ServletContext application = null;
public void contextInitialized(ServletContextEvent sce) {
// ÈÝÆ÷³õʼ»¯Ê±£¬ÏòapplicationÖдæ·ÅÒ»¸ö¿ÕµÄÈÝÆ÷
this.application = sce.getServletContext();
this.application.setAttribute
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public class TestCar1 {
public static final int Ok=1; //Õý³£Çé¿ö
public static final int Wrong=2; //Òì³£Çé¿ö
public int run(){
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