java tomcat 数据问题比较好查，会有以下提示

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org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Unknown database 'datage')

Exception: java.lang.NoSuchMethodError: javax.servlet.ServletRequestEvent.getServletRequest()Ljavax/servlet/ServletRequest;

我把WEB-INF/lib下两个jar删掉，一个是javax.servlet另一哥jstl，页面出现了，但是仍然提示并且没有500错误，加入到原路径中出现500错误

2013-05-15 16:39:10,300 [http-8080-1] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/oddj]- Exception sending request initialized lifecycle event to listener instance of class idv.gsir.utils.listener.MyHttpSessionListener
java.lang.NoSuchMethodError: javax.servlet.ServletRequestEvent.getServletRequest()Ljavax/servlet/ServletRequest;
at idv.gsir.utils.listener.MyHttpSessionListener.requestInitialized(MyHttpSessionListener.java:23)