session防止重复登临报错 严重:Session event listener threw exception java.lang.NullPointerExceptioat com.xyt.interceptor.WuserListener.sessionDestroyed(WuserListener.java:36)\x05at org.apache.catalina.session.StandardSession.expire(StandardS
来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/14 06:48:30
session防止重复登临报错 严重:Session event listener threw exception java.lang.NullPointerExceptioat com.xyt.interceptor.WuserListener.sessionDestroyed(WuserListener.java:36)\x05at org.apache.catalina.session.StandardSession.expire(StandardS
session防止重复登临报错 严重:Session event listener threw exception java.lang.NullPointerExceptio
at com.xyt.interceptor.WuserListener.sessionDestroyed(WuserListener.java:36)
\x05at org.apache.catalina.session.StandardSession.expire(StandardSession.java:702)
\x05at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:592)
\x05at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:682)
\x05at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:667)
\x05at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1316)
\x05at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
\x05at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
\x05at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
\x05at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
\x05at java.lang.Thread.run(Thread.java:619)
session防止重复登临报错 严重:Session event listener threw exception java.lang.NullPointerExceptioat com.xyt.interceptor.WuserListener.sessionDestroyed(WuserListener.java:36)\x05at org.apache.catalina.session.StandardSession.expire(StandardS
应该在登录成功验证页面加一个seession,用户合法的话旧直接跳到欢迎界面 不合法的话就重新跳回登录界面 这个可以通过对session中参数的比较（equals（））来实现