急呀!初学 jsp老是运行出错,郁闷呀!
急呀!初学 jsp老是运行出错,请高手多多指教:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP An error occurred at line: 2 in the jsp file: /class/index.jsp Generated servlet error: [javac] Compiling 1 source file D:\Tomcat 4.1\work\Standalone\localhost\_\class\index_jsp.java:66: package db does not exist db.db cn = null; ^ An error occurred at line: 2 in the jsp file: /class/index.jsp Generated servlet error: D:\Tomcat 4.1\work\Standalone\localhost\_\class\index_jsp.java:68: package db does not exist cn = (db.db) pageContext.getAttribute("cn", PageContext.PAGE_SCOPE); ^ An error occurred at line: 2 in the jsp file: /class/index.jsp Generated servlet error: D:\Tomcat 4.1\work\Standalone\localhost\_\class\index_jsp.java:71: package db does not exist cn = (db.db) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "db.db"); ^ 3 errors at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85) at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:248) at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:315) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:328) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:427) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:142) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187) at javax.servlet.http.HttpServlet.service(HttpServlet.java:809) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948) at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) at java.lang.Thread.run(Thread.java:534)