java.lang.Error: Unresolved compilation problems:
信息: XML validation disabled
([localhost].[/o3] 3714) Error configuring application listener of class com.o3eie.util.SessionEventListener
java.lang.Error: Unresolved compilation problems: 
The import javax.servlet.ServletContext cannot be resolved
The import javax.servlet.http.HttpSession cannot be resolved
The import javax.servlet.http.HttpSessionEvent cannot be resolved
The import javax.servlet.http.HttpSessionListener cannot be resolved
HttpSessionListener cannot be resolved to a type
ServletContext cannot be resolved to a type
HttpSessionEvent cannot be resolved to a type
HttpSession cannot be resolved to a type
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
context cannot be resolved
HttpSessionEvent cannot be resolved to a type
HttpSession cannot be resolved to a type

at com.o3eie.util.SessionEventListener.<init>(SessionEventListener.java:5)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3712)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4211)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
([localhost].[/o3] 3714) Error configuring application listener of class com.o3eie.util.ApplicationEventListener
java.lang.Error: Unresolved compilation problems: 
The import javax.servlet.ServletContextEvent cannot be resolved
The import javax.servlet.ServletContextListener cannot be resolved
ServletContextListener cannot be resolved to a type
ServletContextEvent cannot be resolved to a type
ServletContextEvent cannot be resolved to a type

at com.o3eie.util.ApplicationEventListener.<init>(ApplicationEventListener.java:11)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccesso