Debugging for JSP

I do a remote debugging for my j2ee application.
i want to do debugging for JSP ....like breakpoint etc etc
can you tell any such options available which would be compatible with eclipse .
my server is weblogic.
i heard lomboz is a plugin which does that kind of work.
but when i visited lomboz site ...dont see any such capability of jsp debugging .
does it really work ?
please comment

can you tell any such options available which would
be compatible with eclipse .MyEclipse

Similar Messages

Enable debug for jsp.

Hi,
I have downloaded OEPE for Eclipse Galileo and I am able to keep break points in the jsp. when ever it comes to that line it says attach source which i don't have as it is looking for a .class file. Or if I have made changes to an existing jsp after the server is started, it says jsp is out of sync. :( every time i make changes to a jsp I have to restart the server which takes 30 minutes. I want to do hot code replacement like how its done for java for jsps and xmls. We are using struts and weblogic 9.2 MP3.Please help.
Regards,
Acharya

Hi Raj,
Thanks for ur response. I am able to keep break points etc in my jsp but i am not able to watch or inspect any java variable. I have also tried the keep generated and attached the generated code under admin server, tried attaching the web content alone in the add source, no use .. can you tell me what cold be the issue? atleast i am prepared to copy paste my jsp anywhere so that the change is reflected. every time i make changes I need to take a build deploy it which is very irritating.
Another major major issue I face is if i land in a java file which i havent landed before or made changes, I need to give a space and save or else it is not staying n the break points which is given. this makes this plugin all the more annoying. The Galileo which i downloaded is the one released from eclise and not any of the previous versions.
I am thinkin of movin out of oepe. before I was using com.bea.weblogic.eclipse_1.1.1 a plugin i fond some where and thats better. only issue i face is out of sync wfor which i need to restart the server.
am I missing something? I downloaded the eclipse 5.0, i downloaded oepe-previewgalileo-11.1.1.1.1.200904131351 as it is from the server provider itself I installed oepe-previewgalileo-11.1.1.1.1.200904131351 successfully and i have so many issues?
Please advice & help....
Regards,
Acharya

Debugging Tool for JSP

Is there any debugging tool for JSP, which point out the line number where the error is. currently I am using notepad for JSP coding. It takes too much time for error finding.
Usman

You can use WebSphere Studio Application developer, which would probably be over kill if you are just doing JSPs because it does so much more. You may want to look at its open source verison eclipse at eclipse.org.
Good Luck,
J.Clancey

Remte JSP debugging for standalong OC4J 10.3.x not working

Follow the next steps:
1. Copying the ojc.jar, jdev-rt.jar and jdev-remote.jar to the OC4J_HOME/lib
directory
2. Add the next lines to the application.xml file
< !-- Remote Debug settings -->
< library path="../../../lib/jdev-rt.jar" />
< library path="../../../lib/ojc.jar" />
< library path="../../../lib/ojmisc.jar" />
3. Change the global-web-application.xml in a text editor.
From the following section:
< orion-web-app
jsp-cache-directory="./persistence"
servlet-webdir="/servlet"
development="false"
>
Change development="false" to development="true" to enable servlet
debugging.
4. In the global-web-application.xml file, modify the jsp servlet tags to be:
< servlet>
< servlet-name>jsp< /servlet-name>
< servlet-class>oracle.jsp.runtimev2.JspServlet< /servlet-class>
< init-param>
< param-name>debug_mode< /param-name>
< param-value>true< /param-value>
< /init-param>
< init-param>
< param-name>developer_mode< /param-name>
< param-value>true< /param-value>
< /init-param>
< init-param>
< param-name>encode_to_java< /param-name>
< param-value>true< /param-value>
< /init-param>
< init-param>
< param-name>emit_debuginfo< /param-name>
< param-value>true< /param-value>
< /init-param>
< init-param>
< param-name>jspjavacompiler< /param-name>
< param-value>oracle.jdevimpl.jsp.JspOjcCompiler< /param-value>
< /init-param>
< load-on-startup>0< /load-on-startup>
< /servlet>
5. Start the oc4j using the next command:
java -hotspot -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=4000 -jar oc4j.jar
6. Deploy the application
7. Select the Remote Debugging and Profiling option in the Run Configuration
for the project with the jsp to debug.
8. In the Debugger/Remote section of the run Configuration set the host, port
and timeout to the correct ones (name of the computer where you are running
the application).
When trying to run the jsp you are going to get the error:
STACK ERROR:
07/12/28 11:56:56
....\j2ee\home\application-deployments\MyJ2eeApp\MyJ2eeApp\persistence\_pages\_MyPage
error #552: illegal forward reference
07/12/28 11:56:56 /*@lineinfo:filename=/MyPage.jsp*/
07/12/28 11:56:56
2007-12-28 11:56:57.703 NOTIFICATION J2EE JSP-0008 Unable to dispatch JSP
Page : oracle.classloader.util.AnnotatedClassNotFoundException:
Missing class: _MyPage
Dependent class: oracle.jsp.runtimev2.JspPageInfo
Loader: oc4j:10.1.3
Code-Source: ..../j2ee/home/lib/ojsp.jar
Configuration: < code-source> in META-INF/boot.xml in ....\j2ee\home\oc4j.jar
This load was initiated at MyJ2eeAppInfo.web.MyJ2eeAppInfo.jsp26687282:0.0.0 using the loadClass() method.
The missing class is not available from any code-source or loader in the system.
at oracle.classloader.PolicyClassLoader.handleClassNotFound
(PolicyClassLoader.java:2068) [/C:/sw/oracle/oc4j101330/j2ee/home/lib/pcl.jar
(from system property java.class.path), by sun.misc.Launcher$AppClassLoader@9627532]
Reproduced the problem with the next products:
JDev OC4J Reproduced?
10.1.3.3.0 10.1.3.2.0 YES
10.1.3.3.0 10.1.3.3.0 YES
10.1.3.2.0 10.1.3.2.0 YES
When i try not use the following tags section
< init-param>
< param-name>emit_debuginfo< /param-name>
< param-value>true< /param-value>
< /init-param>
everything is working, but ojc not generate debug information for compiled JSP page and debugger doesn't stop at break points.
When i try use thise tags section, i got the next instructions for compiler in MyPage.java (it is generated from MyPage.jsp):
/*@lineinfo:filename=/MyPage.jsp*/
/*@lineinfo:generated-code*/
and compiler is generating next message in console:
error #552: illegal forward reference
07/12/28 11:56:56 /*@lineinfo:filename=/MyPage.jsp*/
and doesn't want to compile MyPage.java.
I need help with this problem! And i don't have any ideas how to solve it. People, help me, please!

Dear dvohra, have you ever try yourself the method, which you suggest?
It is not working!
If i try to configure OC4j like in blog, IDE doesn't stop in JSP's break points.
So, I need in 100% working solution for remote debugging on oc4j 10.3.x. The main reason of using remote debug for me is that i have to develop portlets, and i have to invoke my portlets from portal. It is posible only when i deploy my portlet on stand alone oc4j!
I really need remote debug! And i'll be very thankful someone for 100% working solution!

Debug a jsp program in wsad

Hi ,
Plz tell me how to debug a jsp program in wsad and how to add a break point in it.

Try a fresh install of JDeveloper 10.1.3.3
And a new project with this JSP:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page contentType="text/html;charset=windows-1252"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252"/>
<title>untitled1</title>
</head>
<body>
<% String a = "hello";
if(a.equals("shay")){
a="boo";
%>
</body>
</html>breakpoints work for me.
If they still don't work for you try running [jdev-root]\jdev\bin\jdev.exe and let us know if you see any errors on the command line window.

Jdeveloper patches for jsp?

Hi
Is there a patch for jdeveloper 3.0 that makes the debugging of JSPs possible? Right now the line numbers that are shown are way off.
Where can I find the patches on this site?
ORACLE - Isn't it possible that such a big e-business company could design the site so you don't need to ask where the patch pages are located ?
Regards
/Joachim

JDeveloper 3.0 supports JSP (Java Server Pages ) Debugging. No need of any additional patches.
Right now the line numbers that are shown are way off.
(What exactly is the meaning of this , I am not clear, please explain).
In JDeveloper 3.1 it is possible to do the remote debugging of JSP's and Servlets running on another web servers.
One restriction is that
When debugging JSP's (either locally or remotely), any debugging feature which uses expression evaluation will not be available. This includes conditional breakpoints,
expression logging for breakpoint occurrence, and the Run->Evaluate/Modify dialog.
The above is mentined in the Release Notes for Oracle JDeveloper 3.1.
null

Apache for HTML and Tomacat for JSP

I have a linux system. I would want to use Apache as web server ( for HTML file ) and Tomcat as application server ( for JSP file ). I have my sites in dir /var/www/... and I have configurated Apache to "read" these sites... but when I insert a JSP file in these directories Tomcat doesn't work that file.
How I have to do that??

There is a file in $TOMCAT_HOME/conf directory named "server.xml". In this file you should put the following line codes:
<Context path="$APPLICATION_DIRECTORY"
docBase="webapps/$APPLICATION_DIRECTORY"
crossContext="false"
debug="0"
reloadable="true" >
</Context>
The APPLICATION_DIRECTORY is the same that you using in apache config file "httpd.conf".

How to fix 'class' or 'interface' expected for jsp

below is the stack trace
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
/home/sherali/.netbeans/5.5/apache-tomcat-5.5.17_base/work/Catalina/localhost/UVSDataSearch/org/apache/jsp/pager_002ddemo_jsp.java:7: 'class' or 'interface' expected
import java.util.*;
^
Generated servlet error:
/home/sherali/.netbeans/5.5/apache-tomcat-5.5.17_base/work/Catalina/localhost/UVSDataSearch/org/apache/jsp/pager_002ddemo_jsp.java:8: 'class' or 'interface' expected
import java.io.*;
^
2 errors
thanks a lot in advance.
my jsp is
<%@ page session="false" %>
<%@ page import="tauvex.*;" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://jsptags.com/tags/navigation/pager" prefix="pg" %>
<html>
<head>
<title>Tauvex Search Results</title>
<%
* Pager Tag Library
* Copyright (C) 2002 James Klicman <[email protected]>
* The latest release of this tag library can be found at
* http://jsptags.com/tags/navigation/pager/
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
%>
<style type="text/css">
A.nodec { text-decoration: none; }
</style>
</head>
<body bgcolor="#ffffff">
<%
String style = getParam(request, "style", "simple");
String position = getParam(request, "position", "top");
String index = getParam(request, "index", "center");
int maxPageItems = getParam(request, "maxPageItems", 3);
int maxIndexPages = getParam(request, "maxIndexPages", 3);
%>
<%
String query1=(String)request.getAttribute("query1");
String query=(String)request.getAttribute("query");
String ShowFile=(String)request.getAttribute("ShowFile");
String ShowRA=(String)request.getAttribute("ShowRA");
String ShowDEC=(String)request.getAttribute("ShowDEC");
String Telescope=(String)request.getAttribute("Telescope");
String ObservationDates=(String)request.getAttribute("ObservationDates");
String Filter=(String)request.getAttribute("Filter");
String RA=(String)request.getAttribute("RA");
String DEC=(String)request.getAttribute("DEC");
String DATE=(String)request.getAttribute("DATE");
String DATE1=(String)request.getAttribute("DATE1");
String Radious=(String)request.getAttribute("Radious");
String FILTER[]=(String[])request.getAttribute("FILTER");
String OrderBy1=(String)request.getAttribute("OrderBy1");
String OrderBy2=(String)request.getAttribute("OrderBy2");
String OrderBy3=(String)request.getAttribute("OrderBy3");
%>
<%
out.println("<form action=\"PlainSQLQuery\" method=POST>");
out.println("<textarea rows = 5 cols = 40 name=query id=\"query\">");
out.println(query);
out.println("</textarea>");
out.println("<input type = submit value = \"Submit\">");
out.println("<input type = reset value = \"Reset\">");
out.println("</form>");
%>
<center>
<table border="0" width="90%" cellpadding="4">
<tr>
<td colspan="2" align="left" valign="top">
<table border="0" cellspacing="2" cellpadding="0">
<tr><td>Max. Page Items </td>
<td><input type="text" size="4" name="maxPageItems" value="<%= maxPageItems %>" onChange="this.form.submit();"></td></tr>
<tr><td>Max. Index Pages </td>
<td><input type="text" size="4" name="maxIndexPages" value="<%= maxIndexPages %>" onChange="this.form.submit();"></td></tr>
</table>
</td>
</tr>
</table>
<pg:pager
index="<%= index %>"
maxPageItems="<%= maxPageItems %>"
maxIndexPages="<%= maxIndexPages %>"
url="TauvexDataServlet"
export="offset,currentPageNumber=pageNumber"
scope="request">
<%-- keep track of preference --%>
<pg:param name="style"/>
<pg:param name="position"/>
<pg:param name="index"/>
<pg:param name="maxPageItems"/>
<pg:param name="maxIndexPages"/>
<pg:param name="RA"/>
<pg:param name="DEC"/>
<pg:param name="DATE"/>
<pg:param name="DATE1"/>
<pg:param name="Radious"/>
<pg:param name="FILTER"/>
<pg:param name="ShowRA"/>
<pg:param name="ShowDEC"/>
<pg:param name="Telescope"/>
<pg:param name="ObservationDates"/>
<pg:param name="Filter"/>
<pg:param name="OrderBy1"/>
<pg:param name="OrderBy2"/>
<pg:param name="OrderBy3"/>
<%-- save pager offset during form changes --%>
<input type="hidden" name="pager.offset" value="<%= offset %>">
<%-- warn if offset is not a multiple of maxPageItems --%>
<% if (offset.intValue() % maxPageItems != 0 &&
("alltheweb".equals(style) || "lycos".equals(style)) )
%>
<p>Warning: The current page offset is not a multiple of Max. Page Items.
<br>Please
<pg:first><a href="<%= pageUrl %>">return to the first page</a></pg:first>
if any displayed range numbers appear incorrect.</p>
<% } %>
<%-- the pg:pager items attribute must be set to the total number of
items for index before items to work properly --%>
<% if ("top".equals(position) || "both".equals(position)) { %>
<br>
<pg:index>
<% if ("texticon".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/texticon.jsp" flush="true"/>
<% } else if ("jsptags".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/jsptags.jsp" flush="true"/>
<% } else if ("google".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/google.jsp" flush="true"/>
<% } else if ("altavista".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/altavista.jsp" flush="true"/>
<% } else if ("lycos".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/lycos.jsp" flush="true"/>
<% } else if ("yahoo".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/yahoo.jsp" flush="true"/>
<% } else if ("alltheweb".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/alltheweb.jsp" flush="true"/>
<% } else { %>
<jsp:include page="/WEB-INF/jsp/simple.jsp" flush="true"/>
<% } %>
</pg:index>
<% } %>
<hr>
<form action="ZipServlet" method="get" name="download" onsubmit="return Form1_Validator(this)">
<table id="output">
<CAPTION><EM>Fits file Search Results</EM></CAPTION><tr>
<%
out.println("<th>Check Box</th>");
out.println("<th>File Name</th>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<th>RA_START</th>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<th>RA_END</th>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<th>DEC_START</th>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<th>DEC_END</th>");
if(Telescope!=null && "on".equals(Telescope))
out.println("<th>Telescope</th>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println("<th>STARTOBS</th>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println("<th>ENDOBS</th>");
if(Filter!=null && "on".equals(Filter))
out.println("<th>FILTER</th>");
out.println("</tr>");
%>
<%--
<table width="90%" cellspacing="4" cellpadding="4">
Since the data source is static, it's easy to offset and limit the
loop for efficiency. If the data set size is not known or cannot
be easily offset, the pager tag library can count the items and display
the correct subset for you.
The following is an example using an enumeration data source of
unknown size. The pg:pager items and isOffset attributes must
not be set for this example:
--%>
<%
Enumeration myDataList1 = (Enumeration)request.getAttribute("myDataList1");
if (myDataList1 == null)
throw new RuntimeException("myDataList1 is null");
%>
<% while (myDataList1.hasMoreElements()) { %>
<% TauvexData elem = (TauvexData)myDataList1.nextElement(); %>
<pg:item> <%
out.println("<tr>");
%>
<td><input type= "checkbox" name="cb" value="<%=elem.getDownload()%>"></td>
<td><a href="<%= elem.getDownload() %>"><%= elem.Fitsfilename %></a></td>
<%
// out.println("<td> "+elem.Fitsfilename+" </td>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<td> "+elem.RA_START+" </td>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<td> "+elem.RA_END+"</td>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<td> "+elem.DEC_START+" </td>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<td> "+elem.DEC_END+" </td>");
if(Telescope!=null && "on".equals(Telescope))
out.println("<td> "+elem.telescope+" </td>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println("<td> "+elem.STARTOBS+" </td>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println(" <td> "+elem.ENDOBS+" </td>");
if(Filter!=null && "on".equals(Filter))
out.println("<td> "+elem.FILTER+" </td>");
out.println("</tr>");
%> </pg:item>
<% } %>
</table>
<input type="button" name="CheckAll" value="Check All Boxes" onclick="modify_boxes(true,3)">
<input type="button" name="UnCheckAll" value="UnCheck All Boxes" onclick="modify_boxes(false,3)">
<input type="submit" value="Download">
</form>
<hr>
<pg:pages>
<a href="<%= pageUrl %>"><%= pageNumber %></a>
</pg:pages>
<pg:last>
<a href="<%= pageUrl %>">[ Last >| (<%= pageNumber %>) ]</a>
</pg:last>
<% if ("bottom".equals(position) || "both".equals(position)) { %>
<pg:index>
<% if ("texticon".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/texticon.jsp" flush="true"/>
<% } else if ("jsptags".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/jsptags.jsp" flush="true"/>
<% } else if ("google".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/google.jsp" flush="true"/>
<% } else if ("altavista".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/altavista.jsp" flush="true"/>
<% } else if ("lycos".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/lycos.jsp" flush="true"/>
<% } else if ("yahoo".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/yahoo.jsp" flush="true"/>
<% } else if ("alltheweb".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/alltheweb.jsp" flush="true"/>
<% } else { %>
<jsp:include page="/WEB-INF/jsp/simple.jsp" flush="true"/>
<% } %>
</pg:index>
<% } %>
</pg:pager>
</center>
</body>
</html>
<%!
private static int num =1;
private static String getName(){
String str="cb";
str=str+num;
num++;
return str ;
private static final String getParam(ServletRequest request, String name,
String defval)
String param = request.getParameter(name);
return (param != null ? param : defval);
private static final int getParam(ServletRequest request, String name,
int defval)
String param = request.getParameter(name);
int value = defval;
if (param != null) {
try { value = Integer.parseInt(param); }
catch (NumberFormatException ignore) { }
return value;
private static void radio(PageContext pc, String name, String value,
boolean isDefault) throws java.io.IOException
JspWriter out = pc.getOut();
String param = pc.getRequest().getParameter(name);
out.write("<input type=\"radio\" name=\"");
out.write(name);
out.write("\" value=\"");
out.write(value);
out.write("\" onChange=\"this.form.submit();\"");
if (value.equals(param) || (isDefault && param == null))
out.write(" checked");
out.write('>');
%>

Well, putting all that Java code into a JSP was a bad idea in the first place, just on general design principles. But you've done it in such a way that the result of compiling the JSP is malformed Java code. Frankly I would just throw it away and put the Java code into a servlet or some other Java class, where it belongs.
But if you're really working in a place where nobody has learned anything since 2003, and you're forced to support that old junk, then I would point out that the error occurs before the place which generates this line:
import java.util.*;You only need to look at two of the thousand lines of code you posted.

Unable to compile class for JSP

Please can anyone help me to solve this.
Actually,this is the condition.
In my db,there is a table called UserPassword, which has 4
fields(empNo,UserName,password,level). Now I want to do these things:
When the user submits the data to create a new account via HTML form, it submits the data to the file called CreateAcc.jsp. In this file it perform some logic,here are they.
1)To check the empNo,if it is already exist in the DB,
     if empNo =exist then display error.(record already exist)
     if empNo =notexist then do task 2).
2)check the UserName,if it is already exist in the db,
     if UserName=exist then display error.(because it's a primary key)
     if UserName=notexist then do task 3).
3)Create a new user account and save it to the db.
To do these tasks,I never create a new objects for the tasks 1) and 2).
only for task 3)create an object.
Is it the right way?
Here is the file CreateAcc.jsp
<%@ page language="java" %>
<%@ page import="core.UserAccManager" %>
<%@ page import="data.UserPassword" %>
<jsp:useBean id="UserAccManager" class="core.UserAccManager" scope="session"/>
<jsp:setProperty name="UserAccManager" property="*"/>
<jsp:useBean id="UserPassword" class="data.UserPassword" scope="session"/>
<jsp:setProperty name="UserPassword" property="*"/>
<%
String nextPage ="MainForm.jsp";
if(UserPassword.verifyEmpno()){
     if(UserPassword.verifyUsername()){
          if(UserPassword.createAcc()) nextPage ="MsgAcc.jsp";
      }else{
           nextPage="UserNameExist.jsp";
      else{
          nextPage="UserAccError.jsp";
%>
<jsp:forward page="<%=nextPage%>"/>The directory structure:
UserPassword.java- F:/Project/core/data/UserPassword.java
UserAccManager.java - F:/Project/core/UserAccManager.java
Now both are compiling.I put the class files into the TOMCAT,as follows.
UserAccManager.class - webapps/mySystemName/WEB-INF/classes/core/
UserPassword.class - webapps/mySystemName/WEB-INF/classes/core/data/
Here is the full code of the file UserAccManager.java.
package core;               //Is this right?
import data.UserPassword;     //Is this right?
import java.io.*;
import java.sql.*;
import java.util.*;
import javax.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public final class UserAccManager{
   private static final String DRIVER = "com.mysql.jdbc.Driver";
   private static final String URL = "jdbc:mysql://localhost:3306/superfine";
   private static Connection connection;
   private static PreparedStatement pstmt1;
   private static PreparedStatement pstmt2;
   private static PreparedStatement pstmt3;
   private UserAccManager(){
   // Initializes the connection and statements
   public static void initConnection() {
      if (connection == null) {
         try {
            String sql;
            // Open the database
            Class.forName(DRIVER).newInstance();
            connection = DriverManager.getConnection(URL);
            // Prepare the statements
           sql = "SELECT * FROM UserPassword where empNo= ?";
           pstmt1 = connection.prepareStatement(sql);
            sql = "SELECT UserName FROM UserPassword where UserName= ?";
            pstmt2 = connection.prepareStatement(sql);
         sql ="INSERT INTO UserPassword VALUES(?,?,?,?)";
         pstmt3 = connection.prepareStatement(sql);
         catch (Exception ex) {
            System.err.println(ex.getMessage());
   // Closes the connection and statements
   // Method to be called by main class when finished with DB
   public void closeConnection() {
      //same as previous
   public static boolean verifyEmpno(int empno) {
      boolean emp_no_select_ok = false;
      int emp = -1;
      initConnection();
     try {
      pstmt1.setInt(1, empno);
         ResultSet rs1 = pstmt1.executeQuery();
     while(rs1.next()){
          emp=rs1.getInt("empNo");
     if(emp>0)
          emp_no_select_ok = false;
     } else{
          emp_no_select_ok = true;
        rs1.close();
     pstmt1.close();
      catch (Exception ex) {
         System.err.println(ex.getMessage());
      return emp_no_select_ok;
   public static boolean verifyUsername(String username) {
      boolean user_name_select_ok = false;
      String user = "xxxx";
      initConnection();
      try {
      pstmt2.setString(1, username);
         ResultSet rs2 = pstmt2.executeQuery();
        while(rs2.next()){
          user=rs2.getString("UserName");
           if(!user.equals("xxxx"))
          user_name_select_ok = false;
        } else{
          user_name_select_ok = true;
       rs2.close();
      catch (Exception ex) {
         System.err.println(ex.getMessage());
      return user_name_select_ok;
     public static boolean createAcc(int empno, String username, String password, int
level){
          boolean create_acc_ok = false;
          initConnection();
          try{
                  //create a new object,from the UserPassword table.
               UserPassword useraccount = new UserPassword();
               useraccount.setEmpno(empno);
               useraccount.setUsername(username);
               useraccount.setPassword(password);
               useraccount.setLevel(level);
               //assign value for ???
               pstmt3.setInt(1, useraccount.getEmpno());
               pstmt3.setString(2, useraccount.getUsername());
               pstmt3.setString(3, useraccount.getPassword());
               pstmt3.setInt(4, useraccount.getLevel());
               if(pstmt3.executeUpdate()==1) create_acc_ok=true;
               pstmt3.close();
                       //con.close();
            catch(SQLException e2){
                       System.err.println(e2.getMessage());
          return create_acc_ok;
}here is the bean (part of it)
package data;               //is it right?
import java.io.*;
import java.sql.*;
import java.util.*;
import javax.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class UserPassword
     private int empno;
     private String username;
     private String password;
     private int level;
     // Constructor
     public UserPassword()
          this.empno = empno;
          this.username = username;
          this.password = password;
          this.level = level;
     // setters and getters are here.
//     public boolean verifyEmpno() {
//               return UserAccManager.verifyEmpno(empno);
//      public boolean verifyUsername(String username) {
//           return UserAccManager.verifyUsername(username);
     // These 2 methods not compile with or without para's.So I leave that job for the
     //controll class UserAccManager.java.
Now my problem is this: When I submit data, there is an error;org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: -1 in the jsp file: null
Generated servlet error:
[javac] Compiling 1 source file
C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:8:
cannot access core.data.UserPassword
bad class file: C:\Program Files\Apache Group\Tomcat
4.1\webapps\HRM\WEB-INF\classes\core\data\UserPassword.class
class file contains wrong class: data.UserPassword
Please remove or make sure it appears in the correct subdirectory of the classpath.
import core.data.UserPassword;
^
1 error
Are there any mistakes? If so tell me where is it and how to change them.Please help.

I try it that way, but it don't compile.
Error:core\data\UserPassword.java:package javax.servlet does not exist
import javax.servlet.*;
core\data\UserPassword.java:package javax.servlet.http does not exist
import javax.servlet.http.*;
So,I comment them only in the UserPassword.java file,and compile it again.
Then it compile well.I goto the directory to get the .class files.
But there is only UserPassword.class inside the data folder. There is not
UserAccManager.class in the core folder.
Then I try this way,I put my 2 java files in to a new folder,
F:\SystemName\com
When I try it that way, but it don't compile.
javac -classpath . -d . com\*.javaError:com\UserPassword.java:package javax.servlet does not exist
import javax.servlet.*;
com\UserPassword.java:package javax.servlet.http does not exist
import javax.servlet.http.*;
So,I comment them only in the UserPassword.java file,and compile it again.
Now both are compiling well.There was 2 class files.
I put them in to the WEB-INF/classes/com directory.
Start the server.But it gave errors:
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:68: cannot resolve symbol
symbol : variable empno
location: class org.apache.jsp.CreateAcc_jsp
if(UserPassword.verifyEmpno(empno)){
                            ^
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:69: cannot resolve symbol
symbol : variable username
location: class org.apache.jsp.CreateAcc_jsp
     if(UserAccManager.verifyUsername(username)){
                                         ^
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:69: non-static method
verifyUsername(java.lang.String) cannot be referenced from a static context
     if(UserAccManager.verifyUsername(username)){
                         ^
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable empno
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                            ^
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable username
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                                   ^
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable password
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                                            ^
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable level
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                                                     ^
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: non-static method
createAcc(int,java.lang.String,java.lang.String,int) cannot be referenced from a static
context
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                 ^
8 errorsTo solve the problem non-static method,I goto the UserAccManager.java file and do these
things.
package com;
import java.io.*;
import java.sql.*;
import java.util.*;
import javax.sql.*;
//import javax.servlet.*;               //otherwise it tells an error.(package
                              //javax.servlet does not exist)
//import javax.servlet.http.*;
public class UserAccManager {
   private static final String DRIVER = "com.mysql.jdbc.Driver";
   private static final String URL = "jdbc:mysql://localhost:3306/superfine";
   private static Connection connection;
   private static PreparedStatement pstmt1;
    private static PreparedStatement pstmt2;
      private static PreparedStatement pstmt3;
   private UserAccManager() {
   // Initializes the connection and statements
   private static void initConnection() {
         //same
   // Closes the connection and statements
   // Method to be called by main class when finished with DB
   public static void closeConnection() {
     //same
   public static boolean verifyEmpno(int empno) {
      // same.
   public static boolean verifyUsername(String username) {
     //same.
     public static boolean createAcc(int empno, String username, String password, int
level){
          //same
package com;
import java.io.*;
import java.sql.*;
import java.util.*;
import javax.sql.*;
//import javax.servlet.*;
//import javax.servlet.http.*;
public class UserPassword {
     // same
Again compile those files and put .class filses into the WEB-INF/classes/com directory.
When i submits the data via the form it generates an error:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
Generated servlet error:
    [javac] Compiling 1 source file
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:68: cannot resolve symbol
symbol : variable empno
location: class org.apache.jsp.CreateAcc_jsp
if(UserAccManager.verifyEmpno(empno)){
                              ^
An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
Generated servlet error:
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:69: cannot resolve symbol
symbol : variable username
location: class org.apache.jsp.CreateAcc_jsp
     if(UserAccManager.verifyUsername(username)){
                                         ^
An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
Generated servlet error:
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable empno
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                            ^
An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
Generated servlet error:
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable username
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                                   ^
An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
Generated servlet error:
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable password
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                                            ^
An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
Generated servlet error:
C:\Program Files\Apache Group\Tomcat
4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
symbol : variable level
location: class org.apache.jsp.CreateAcc_jsp
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
                                                                     ^
6 errorshere is the CreateAcc.jsp file
<%@ page language="java" %>
<%@ page import="com.UserAccManager" %>
<%@ page import="com.UserPassword" %>
<jsp:useBean id="userPassword" class="com.UserPassword" scope="request"/>
<jsp:setProperty name="userPassword" property="*" />
<%
String nextPage ="MainForm.jsp";
if(UserAccManager.verifyEmpno(empno)){
     if(UserAccManager.verifyUsername(username)){
          if(UserAccManager.createAcc(empno, username,password,level)) nextPage
="MsgAcc.jsp";
      }else{
           nextPage="UserNameExist.jsp";
      else{
          nextPage="UserAccError.jsp";
%>
<jsp:forward page="<%=nextPage%>"/>Please, anyone know how to send these parameters to the java file.
Thanks.

How can I set up breakpoints in eclipse for jsp?

I saw somebody can set up breakpoints in eclipse for jsp.
But I can not do that on my eclipse.
What's the difference?
Thanks.

I don't think this had a keyboard shortcut even before (checked in CS6). There's an alternative though.
1. Create a JSFL file with following code and save it in the commands folder as 'Remove Tween'.
fl.getDocumentDOM().getTimeline().setFrameProperty('tweenType', 'none');
2. Now goto Edit Menu > Keyboard Shortcuts..
3. Search for 'Remove Tween' and assign a keyboard shortcut to it.
Now everytime you press the assigned key - jsfl script is executed which essentially removes the tween from selected frame. (works for Classic and Shape tween but not Motion Tweens)

How to enable remote debugging for a session other than the current one

Hi all,
I am trying to figure out how to enable remote debugging for a session other than the one I am currently using.
More specifically, we have an application that is making database calls to Oracle 11gR2. Something is causing an exception during this invocation. My system is currently not set up to recompile said application, so I can't just add the debug call to the code and recompile. Therefore I would like to be able to log into the database (as sys, if necessary) and invoke dbms_debug_jdwp.connect_tcp on the desired session.
The docs indicate that I should be able to do so:
dbms_debug_jdwp.connect_tcp(
host IN VARCHAR2,
port IN VARCHAR2,
session_id IN PLS_INTEGER := NULL,
session_serial IN PLS_INTEGER := NULL,
debug_role IN VARCHAR2 := NULL,
debug_role_pwd IN VARCHAR2 := NULL,
option_flags IN PLS_INTEGER := 0,
extensions_cmd_set IN PLS_INTEGER := 128);
But when I try (even as sys), I get the following:
exec dbms_debug_jdwp.connect_tcp('1.2.3.4',5678,<session id>,<session serial>);ORA-00022: invalid session ID; access denied
ORA-06512: at "SYS.DBMS_DEBUG_JDWP", line 68
ORA-06512: at line 1
00022. 00000 - "invalid session ID; access denied"
*Cause: Either the session specified does not exist or the caller
does not have the privilege to access it.
*Action: Specify a valid session ID that you have privilege to access,
that is either you own it or you have the CHANGE_USER privilege.
I've tried granting the 'BECOME USER' privilege for the relevant users, but that didn't help. I read something about having to set some kind of ACL as of 11gR1, but the reference documentation was very confusing.
Would someone be able to point me in the right direction? Is this even possible, or did I misread the documentation?

Interesting deduction, that would be very useful indeed. I hate recompiling just to add the debug call, and it can't be done in our production environment. But it seems unlikely to me it would be implemented this way.
I would cross-post this in the SQL AND PL/SQL forum though, as this is really a database issue, not with the SQL Developer tool. Do add the links to the other posts in each.
Regards,
K.

[SOLVED] Enabling debug for ath9k in compat-drivers-patched from AUR

Wireless card: TP-LINK TL-WN951N. lspci says that it is an Atheros AR5416 adapter [AR5008].
Some background: I'm having the same issues as the OP in this thread, which references this bug report. The problem is that I get a 2000 ms ping every 30 seconds. So 2 seconds of inactivity every 30 seconds. I have the same wireless PCI card, as well. I need to fix this, because it's making online gaming impossible. I should also note that the card is working just fine in Windows 8, however. I am using net-auto-wireless. I have tried using wicd, enabling ath9k's nohwcrypt option, toggling the card's power save, installing the latest compat-drivers-patched from the AUR, toggling different settings in my motherboard's BIOS, and removing the antennae from the card. But nothing has made a significant difference.
I think I'm really close now. I just have to disable ANI. But in order to do that, it seems that I need to enable debugging for ath9k. But this means that I need to either recompile a custom kernel, or somehow enable debug for ath9k in compat-drivers-patched from the AUR. I'd prefer the latter, as that means that I will have a more bleeding-edge driver. That, and I won't have to touch the kernel as much. What I want is described on this page. But it seems too complicated to me. Please let me explain.
I've installed things from the AUR before, as mentioned above, and have properly configured my makepkg.conf for my system. So I'd like to use the CFLAGS and such that I've set. I don't understand how everything works in the PKGBUILD; I don't have much experience with sed and awk and regular expressions, and haven't done much shell scripting at all. It seems that at some point in the PKGBUILD, I need to enable debugging for ath9k before it is compiled. Apparently on the last page I linked to, I need to add:
export CONFIG_ATH_DEBUG=y
export CONFIG_ATH9K_DEBUG=y
export CONFIG_ATH9K_DEBUGFS=y
to some config.mk file. I can only get access to the config.mk file after I install the package with pacman. I've tried adding those lines to my /etc/profile file, and checked, after a reboot, with "set", that those variables are indeed set. But the thing is, with these variables set in /etc/profile, when I run makepkg, makepkg fails with an error 2. I tried again and got the same error. I removed those lines from my /etc/profile, rebooted, tried makepkg again, and everything worked. So putting those lines in my /etc/profile is not the solution, and I feel like I'm doing something very stupid. What am I doing wrong?
I should also note that I've tried to read the wiki page on compiling a custom kernel using ABS, but it seems to just say "get your custom configuration files" and then just continue (so it assumes that I should already be familiar with the configuration part). The PKGBUILD and Creating Packages wiki pages also seem to be a little... too advanced for me at this point in time.
So how do I enable debugging for ath9k in compat-drivers-patched from the AUR? I'd prefer to stick with only editing the PKGBUILD and using makepkg, if possible.
I've really tried to search the web and the arch forums on how to fix this problem myself, but alas, it seems that I need help this time. I greatly appreciate your time for reading my long post.
UPDATE:
I've made a lot of progress. I ended up removing the AUR package with pacman by invoking "pacman -Rsn compat-drivers-patched".
Instructions for [almost] success: First, download compat-drivers-patched from AUR. Then move it to the "builds" directory (or "local", if using ABS). Extract the tarball. After the new directory is created, cd into it. Now here's the important part: run
$ makepkg -so
Then cd into src, cd into the directory inside src, then edit the config.mk file. Make sure these lines are uncommented (or created, if not already there):
export CONFIG_CFG80211_DEBUGFS=y
export CONFIG_MAC80211_DEBUGFS=y
export CONFIG_ATH_DEBUG=y
export CONFIG_ATH9K_DEBUG=y
export CONFIG_ATH9K_DEBUGFS=y
(source)
Now run "cd ../.." to go back up two directories. Now run:
$ makepkg -e
# pacman -U <file that was produced>
And I ran "mkinitcpio -p linux" just in case, but I'm not sure if that is necessary at all. I'm... not touching the kernel, right?
Now I ran:
echo 1 > /sys/kernel/debug/ieee80211/phy0/ath9k/disable_ani
But bash would say that the file or directory doesn't exist. Even if I prepend it with "sudo", I get the same results. I was only able to get the command to work if I logged in as root. I even put the line in my /etc/profile. The 2000 ms ping every 30 seconds is now GONE. HOWEVER! If I reboot and log in as a normal user, the problem is there again. If I reboot and log in as root, the problem is gone. If I then log out and then log back in as a normal user, the problem does not come back.
So really, I can avoid the problem if I first log in as root, log out, and then log back in as a normal user. But this is a great inconvenience. I would much prefer if I could just log in as a normal user right after boot, and have everything working.
Now, how do I get the command to automatically run at boot as root (without me having to log in as root), and work?
UPDATE 2:
I got it working. Putting the line in /etc/profile is not the solution. I created a custom systemd .service file.
Put this into /etc/systemd/service (name it "disable_ani.service"):
EDIT: Wow. I made a glaring typo here. It should be /etc/systemd/system/disable_ani.service
[Unit]
Description=disable_ani
[Service]
Type=oneshot
ExecStart=/bin/sh -c "echo 1 > /sys/kernel/debug/ieee80211/phy0/ath9k/disable_ani"
[Install]
WantedBy=multi-user.target
Then make sure to "sudo chmod 755 /etc/systemd/service/disable_ani.service", since root owns this file.
Then run "sudo systemctl enable disable_ani.service".
EDIT: It has been brought to my attention that there is a much simpler way than creating a custom service.
Using a tmpfile:
/etc/tmpfiles.d/disable_ani.conf
w /sys/kernel/debug/ieee80211/phy0/ath9k/disable_ani - - - - 1
Done.
Now ANI is persistently disabled between boots, even if I log in as a normal user right after boot.
Thanks for reading.
Last edited by vyu223 (2013-03-12 10:20:19)

So zsh is telling you that the command didn't work, since it claims that there is no such file or directory. I had a lot of trouble with getting the echo command to work, as well. I found that if out of these lines:
export CONFIG_CFG80211_DEBUGFS=y
export CONFIG_MAC80211_DEBUGFS=y
export CONFIG_ATH_DEBUG=y
export CONFIG_ATH9K_DEBUG=y
export CONFIG_ATH9K_DEBUGFS=y
If the first and second line above were not uncommented in the config.mk file, I couldn't leave the last line above uncommented as well, or else makepkg would fail and give me an error. So originally I had only the 3rd and 4th lines above uncommented/inserted in my config.mk. With that configuration, I could not get the echo command to work, no matter what. Have you uncommented or inserted all of the above 5 lines into your config.mk?
After making sure all of the above 5 lines were in my config.mk, the echo command still didn't work, even if I preceded the command with sudo, or entered a su session. Bash would tell me that there was no such file or directory. I found that if I actually logged out of my normal user, and then logged back into the computer as root, the command would work. If your shell does not give you any feedback (particularly, "no such file or directory"), then the command worked. In order to get the command to run every time the computer boots, I used a systemd service, so that the command is issued as root. For some reason, it doesn't work if you put the command into /etc/profile.
Oh, and it would probably be helpful to mention that for the compat-drivers-patched package from the AUR, the PKGBUILD checks to see what your _selected_drivers variable is before compilation. If you set _selected_drivers=ath9k, your compile times will be much shorter.

How to disable debugging for a program or FM ?

Hi,
Is-it possible to disable the debugging functionality for a particular program or FM ? It must be done in the production system and without removing the debugging for all programs/FM.
Thanks a lot
KIndly regards
Thierry De Longueville

Hi,
This can be done by BASIS Guys. Contact your BASIS guys. However i am not sure whether it can be limited only to few programs/transactions/FM.
Please refer this thread :
Disable Debugging Mode
Best regards,
Prashant
PS : Please reward all helpful answers

Unable to compile class for JSP. apache-tomcat-6. What could be wrong?

Hello, I am new to JSP and I am trying a very basic jsp and class file on Windows XP. I get the Unable to compile class for JSP.
Steps that I have done:
javac ch06_01.java , placed the ch06_01.class under
C:\Apps\apache-tomcat-6.0.16\webapps\ch06\WEB-INF\classes
Then grabbed the ch06_02.jsp and placed it under
C:\Apps\apache-tomcat-6.0.16\webapps\ch06\
When I run it (by placing this into Explorer or Firefox URL
http://localhost:8080/ch06/ch06_02.jsp) I get the error further
below. Things I have done and made sure they are in place are:
set up JAVA_HOME to C:\Apps\jdk1.6.0_06
Using CATALINA_BASE: C:\Apps\apache-tomcat-6.0.16
Using CATALINA_HOME: C:\Apps\apache-tomcat-6.0.16
Using CATALINA_TMPDIR: C:\Apps\apache-tomcat-6.0.16\temp
Using JRE_HOME: C:\Apps\jre1.6.0_06
I did a google on the error and I found people saying to place the
tools.jar from the jsk into the lib directory under CATALINA_HOME. But
the examples still don't work. What step could I be missing? Your help is greatly
appreciated.
This is the simple jsp file:
<%@ page import="ch06_01" %>
<HTML>
<HEAD>
<TITLE>Using a JavaBean</TITLE>
</HEAD>
<BODY>
<H1>Using a JavaBean</H1>
<% ch06_01 messager = new ch06_01(); %>
The message is: <%= messager.msg() %>
</BODY>
</HTML>
this is the simple ch6_01 java file:
public class ch06_01
public ch06_01()
public String msg()
return "Hello from JSP!";
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: 6 in the generated java file
The import ch06_01 cannot be resolved
An error occurred at line: 9 in the jsp file: /ch06_02.jsp
ch06_01 cannot be resolved to a type
6: <BODY>
7: <H1>Using a JavaBean</H1>
8:
9: <% ch06_01 messager = new ch06_01(); %>
10:
11: The message is: <%= messager.msg() %>
12:
An error occurred at line: 9 in the jsp file: /ch06_02.jsp
ch06_01 cannot be resolved to a type
6: <BODY>
7: <H1>Using a JavaBean</H1>
8:
9: <% ch06_01 messager = new ch06_01(); %>
10:
11: The message is: <%= messager.msg() %>
12:
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:423)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:316)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:294)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:281)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
Edited by: indikon1 on Jun 12, 2008 1:18 PM
I just updated the directories of the variables to reflect the current status of my system.

What is wrong is that you are using an "old" jsp tutorial :-)
Since Java 1.4, JSPs have been unable to access classes in the "default" package.
What you need to do:
Put the java class ch06_01 in a package.
Steps to do this
- Edit ch06_01 and add the following to the very top of the file (without the quotes): "package mypackage;"
- create a folder "mypackage"
- move ch06_01.java into that folder
- compile that class (now in the mypackage package)
- place ch06_01.class under C:\Apps\apache-tomcat-6.0.16\webapps\ch06\WEB-INF\classes\mypackage
In your jsp:
<%@ page import="mypackage.ch06_01" %>
I would suggest using a more up-to-date tutorial that uses JSTL.
Take a look at this [Apache Tomcat tutorial|http://www.coreservlets.com/Apache-Tomcat-Tutorial/index.html]

Unable to compil class for jsp

error is
HTTP Status 500 -
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: 6 in the generated java file
Syntax error on token ".", Identifier expected after this token
An error occurred at line: 7 in the generated java file
Syntax error on token ".", Identifier expected after this token
An error occurred at line: 9 in the jsp file: /travel/issue.jsp
LibraryStudent cannot be resolved to a type
6: <BODY>
7: <H1>issue books</H1>
8: <CENTER>
9: <jsp:useBean id="student"
10: type="LibraryStudent"
11: scope="session" />
12: student name:
An error occurred at line: 9 in the jsp file: /travel/issue.jsp
LibraryStudent cannot be resolved to a type
6: <BODY>
7: <H1>issue books</H1>
8: <CENTER>
9: <jsp:useBean id="student"
10: type="LibraryStudent"
11: scope="session" />
12: student name:
An error occurred at line: 13 in the jsp file: /travel/issue.jsp
LibraryStudent cannot be resolved to a type
10: type="LibraryStudent"
11: scope="session" />
12: student name:
13: <jsp:getProperty name="student" property="studentName" />
14:
15: book name:
16: <jsp:getProperty name="student" property="bookName" />
An error occurred at line: 16 in the jsp file: /travel/issue.jsp
LibraryStudent cannot be resolved to a type
13: <jsp:getProperty name="student" property="studentName" />
14:
15: book name:
16: <jsp:getProperty name="student" property="bookName" />
17:
18: <jsp:getProperty name="student"
19: property="issueData" />
An error occurred at line: 18 in the jsp file: /travel/issue.jsp
LibraryStudent cannot be resolved to a type
15: book name:
16: <jsp:getProperty name="student" property="bookName" />
17:
18: <jsp:getProperty name="student"
19: property="issueData" />
20: </FORM>
21: </CENTER>LibraryStudent.java is
import java.util.*;
import java.text.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.util.*;
public class LibraryStudent {
private String emailAddress, s,password, sname,bname;
private String date,value;
public String getStudentName() {
return(sname);
public void setStudentName(String sname) {
this.sname = sname;
public String getEmailAddress() {
return(emailAddress);
public void setEmailAddress(String emailAddress) {
this.emailAddress = emailAddress;
public String getPassword() {
return(password);
public void setPassword(String password) {
this.password = password;
public String getBookName() {
return(bname);
public void setBookName(String bname) {
this.bname = bname;
public String getDate() {
return(date);
public void setDate(String date) {
this.date = date;
public String getIssueData() //method that create connection withh database
throws ServletException,IOException{
try{
getDate();                   //and add a entry in database
getBookName();
getStudentName();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:db2");
Statement st=con.createStatement();
String sql =
    "insert into table1 (bookname,studentname,date) values(bname,sname,date)";
st.executeUpdate(sql);
System.out.println(sql);
String s= "your book has been issued ";
return(s);
catch(Exception e)
e.printStackTrace();
return "failed";
public String getSumbitData()
throws ServletException,IOException{
try
getBookName();
getStudentName();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:db2");
Statement st=con.createStatement();
String sql =
    "delete from db2 where bookname='bname' and studentname=sname";
st.executeUpdate(sql);
System.out.println(sql);
String s="your book has been sumbitted ";
return(s) ;
catch(Exception e)
e.printStackTrace();
return "failed";
public static int findStudent    //to validate customer
(String emailAddress,
String password) throws ServletException,IOException{
try
if (emailAddress == null) {
return(0);
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:user");
Statement st=con.createStatement();
String sql="select * from user where name='"+emailAddress+"' and password='"+password+"'";
System.out.println(sql);
ResultSet rs=st.executeQuery(sql);
if(rs.next())
return(1);
else
return(0);
}catch(Exception e)
e.printStackTrace();
return (0);}
to be continued.............

and Library.java is import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Library extends HttpServlet {
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
String emailAddress = request.getParameter("emailAddress");//use to email&pass
String password = request.getParameter("password");//from html page
LibraryStudent student = new LibraryStudent();//Make a student Object
int a=LibraryStudent.findStudent(emailAddress, password);//to validate student
if (a==0) {
gotoPage("/library/accounts.jsp", request, response);
else
student.setStudentName(request.getParameter("sname"));//use to sent other textbox
student.setBookName(request.getParameter("bname"));//data in librarystudent
student.setDate(request.getParameter("date"));//class after validation
HttpSession session = request.getSession(true);
session.putValue("student", student);
//for moving different page
if (request.getParameter("issue") != null) {
gotoPage("/travel/issue.jsp",
request, response);
} else if (request.getParameter("sumbit") != null) {
gotoPage("/travel/sumbit.jsp",
request, response);
} else if (request.getParameter("search") != null) {
gotoPage("/travel/search.jsp",
request, response);
} else if (request.getParameter("account") != null) {
gotoPage("/travel/EditAccounts.jsp",
request, response);
} else {
gotoPage("/travel/IllegalRequest.jsp",
request, response);
private void gotoPage(String address,
HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
RequestDispatcher dispatcher =
getServletContext().getRequestDispatcher(address);
dispatcher.forward(request, response);
}    issue.jsp is
   <%@page import="java.io.,java.util.,java.sql.*"%>
<HTML>
<HEAD>
<TITLE>issue books</TITLE>
</HEAD>
<BODY>
<H1>issue books</H1>
<CENTER>
<jsp:useBean id="student"
type="LibraryStudent"
scope="session" />
student name:
<jsp:getProperty name="student" property="studentName" />
book name:
<jsp:getProperty name="student" property="bookName" />
<jsp:getProperty name="student"
property="issueData" />
</FORM>
</CENTER>
</BODY>
</HTML> plz solve my problem .i m new to servlet and jsp and i have keen desire to learn this topic

Debugging for JSP

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