java errore che vul dire?

[texerasmo]

Ho fatto una semplice jsp,l'ho messa sotto tomcat mi ha compilato la mia jsp creandomi la servlet.
Ora mi avevano detto....

Che se prendevo questa servlet (ovvero la mia jsp compilata) la posizionavo sotto la root della mia web-application potevo invocarla come servlet.
Ma non funge.

Questo è il messaggio di errore

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Cannot allocate servlet instance for path /upload/servlet/showpar_jsp
at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:435)
at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:534)


root cause

java.lang.NoClassDefFoundError: showpar_jsp (wrong name: org/apache/jsp/showpar_jsp)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1679)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:968)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1409)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1289)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:885)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:668)
at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:416)
at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:534)

[kingv]

devi creare la struttura di directory che coincide coi package della servlet, cioè:
org/apache/jsp/


ma a cosa serve?

[texerasmo]

in pratica dovrei offuscare il codice delle mie pagine jsp.
allora ho pensato di muovermi in questo modo.
Tu che ne dici è da pazzi?
ci sono altre strade?

[texerasmo]

ho provato a creare un struttura org/apache/jsp sotto la mia web-application ma non mi funge.

cmq questa è mia servlet

// Decompiled by DJ v3.4.4.74 Copyright 2003 Atanas Neshkov Date: 16/11/2004 10.24.52
// Home Page : http://members.fortunecity.com/neshkov/dj.html - Check often for new version!
// Decompiler options: packimports(3)
// Source File Name: showpar_jsp.java

package org.apache.jsp;

import java.io.IOException;
import java.util.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.*;
import org.apache.jasper.runtime.HttpJspBase;

public class showpar_jsp extends HttpJspBase
{

public showpar_jsp()
{
}

public List getIncludes()
{
return _jspx_includes;
}

public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
JspFactory _jspxFactory;
PageContext pageContext;
JspWriter _jspx_out;
_jspxFactory = null;
pageContext = null;
javax.servlet.http.HttpSession session = null;
javax.servlet.ServletContext application = null;
javax.servlet.ServletConfig config = null;
JspWriter out = null;
Object page = this;
_jspx_out = null;
_jspxFactory = JspFactory.getDefaultFactory();
response.setContentType("text/html;charset=ISO-8859-1");
pageContext = _jspxFactory.getPageContext(this, request, response, null, true, 8192, true);
javax.servlet.ServletContext application = pageContext.getServletContext();
javax.servlet.ServletConfig config = pageContext.getServletConfig();
javax.servlet.http.HttpSession session = pageContext.getSession();
JspWriter out = pageContext.getOut();
_jspx_out = out;
out.write("\r\n\r\n");
out.write("<html>\r\n");
out.write("<head>\r\n");
out.write("<title>Verifica parametri");
out.write("</title>\r\n");
out.write("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\">\r\n");
out.write("</head>\r\n\r\n");
out.write("<body bgcolor=\"#FFFFFF\" text=\"#000000\">\r\n ");
out.write("<H1>Parametri ricevuti:");
out.write("</H1>");
out.write("<H3> \r\n ");
Enumeration flds = request.getParameterNames();
out.write("\r\n ");
for(; flds.hasMoreElements(); out.write("</li> \r\n "))
{
String field = (String)flds.nextElement();
String value = request.getParameter(field);
out.write("\r\n ");
out.write("<li>");
out.print(field);
out.write(" = ");
out.print(value);
}

out.write("\r\n ");
out.write("</H3>\r\n");
out.write("</body>\r\n");
out.write("</html>\r\n");
if(_jspxFactory != null)
_jspxFactory.releasePageContext(pageContext);
break MISSING_BLOCK_LABEL_356;
Throwable t;
t;
JspWriter out = _jspx_out;
if(out != null && out.getBufferSize() != 0)
out.clearBuffer();
if(pageContext != null)
pageContext.handlePageException(t);
if(_jspxFactory != null)
_jspxFactory.releasePageContext(pageContext);
break MISSING_BLOCK_LABEL_356;
Exception exception;
exception;
if(_jspxFactory != null)
_jspxFactory.releasePageContext(pageContext);
throw exception;
}

private static Vector _jspx_includes;
}