报错信息
严重: Error configuring application listener of class [com.wondersgroup.console.common.ActiveSessionListener]
java.lang.ClassNotFoundException: com.wondersgroup.console.common.ActiveSessionListener
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1360)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1182)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:546)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:527)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:150)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4621)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5165)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1412)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1402)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
web.xml代码
<listener>
<listener-class>com.wondersgroup.console.common.ActiveSessionListener</listener-class>
</listener>
相应的ActiveSessionListerner类的代码
public class ActiveSessionListener implements HttpSessionListener, HttpSessionAttributeListener {
/**
* @see javax.servlet.http.HttpSessionListener#sessionCreated(javax.servlet.http.HttpSessionEvent)
*/
public void sessionCreated(HttpSessionEvent event) {
}
/**
* @see javax.servlet.http.HttpSessionListener#sessionDestroyed(javax.servlet.http.HttpSessionEvent)
*/
public void sessionDestroyed(HttpSessionEvent event) {
HttpSession session = event.getSession();
ServletContext application = session.getServletContext();
Vector<HttpSession> activeSessions = (Vector<HttpSession>) application.getAttribute("activeSessions");
if (activeSessions != null) {
activeSessions.remove(session);
application.setAttribute("activeSessions", activeSessions);
}
}
在项目上右键选择Properties，然后再弹出的框中选择Java Build Path看看这里面的内容有没有错误的提示，一般出现这个问题就是classpath生成的不对，需要重新生成下，重新编译下程序，我用的MyEclipse开发工具