Unable to run JSP file in TOmcat

My Tomcat is running when i type http://localhost:8080/index.jsp , i'm able to see home page
CLASSPATH=C:\j2sdk1.4.2_08\bin;E:\Grinder;E:\Grinder\lib\grinder.jar;C:\Program Files\Java\j2re1.4.2_08\lib\grinder.jar;
JAVA_HOME=C:\j2sdk1.4.2_08
I tried both pointing to JAVA_HOME C:\Program Files\Java\j2re1.4.2_08
When i try to run the JSP file under C:\Tomcat 5.0\webapps\ROOT\add.jsp. I'm getting following error.
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
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:97)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:346)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:414)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
     org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:106)
     org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:935)
     org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:764)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:382)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

I know the same.
But problem is that whenever I am creating a new file containing single line say 'Hello world' and then try to run,
the similar type of error msg comes.

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C:\Tomcat 4.0\work\localhost\_\qms1_src\blank$jsp.java:64: Class org.apache.jsp.DBSession not found.
sess = (DBSession) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "DBSession");
^
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Confused yet.
Here's the deal. Every Java class is in a package. If it is not declared the it is the default package but the default package is based on the directory it is in.
The DBSession class is in WEB-INF/classes and the jsp gets compiled into a class file that is placed in a different directory. Since the two class files are in different directories they are in different default packages. Thus the import.
Most people don't run into this because they put their tags into packages and import the packages.
To make everybody happy, put your tag in a package, recompile it and then import the package.

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Hello friends i am new to JSP programming.
I recently designed a application to enter values of certain field in a database (Using SQL Server Database)
i used a file name Register.jsp, so when the action is performed by clicking submit button it use to call another file named Register_DB.jsp in which database insertion is performed this 2nd file includes another .java file which is actually creating the JDBC ODBC connection drivers
but whenever i use to run the programme using tomcat-5.5 i use to get certain error as below ------------------->
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 load class for JSP
     org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:591)
     org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:137)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
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root cause
java.lang.ClassNotFoundException: org.apache.jsp.Registration_jsp
     java.net.URLClassLoader$1.run(Unknown Source)
     java.security.AccessController.doPrivileged(Native Method)
     java.net.URLClassLoader.findClass(Unknown Source)
     org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:158)
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     org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:589)
     org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:137)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.
Apache Tomcat/5.5.9***********************************************************************************************************
So can anybody tell me what should i do to resolve this error
here is the code what i have written
File Name Registration.jsp

<%@ import="Login.connectionBean" %>
<%@ language="java" %>
<%@ import="java.io.*" %>
<%@ import="java.sql.*" %>
<%@ import="javax.sql.*" %>
<jsp:useBean id="sq" scope="page" class="Login.connectionBean" type="connectionBean"/>
     <jsp:setProperty name="sq" property="*"/>
<html>

     <head>
          
          <title>Registration Form</title>
     </head>
     <body>
          <form name="Test" action="Registration_DB.jsp" method="get">
               <table width="100%" border="0">
                 <tr>
                    <td colspan="5"></td>
                 </tr>
                 <tr>
                    <td width="10%" height="250"></td>
                    <td width="90%" colspan="4"><div align="center">
                      <table width="437" border="1">
                           <tr>
                              <td><div align="center">User ID </div></td>
                              <td> </td>
                              <td><div align="center">
                                     <input name="User_ID" type="text" size="25" maxlength="25" />
                              </div></td>
                           </tr>
                           <tr>
                              <td><div align="center"></div></td>
                              <td> </td>
                              <td><div align="center"></div></td>
                           </tr>
                           <tr>
                              <td width="149"><div align="center">User name </div></td>
                              <td width="27"> </td>
                              <td width="239"><div align="center">
                                   <input name="User_Name" type="text" size="25" maxlength="25" />
                              </div></td>
                           </tr>
                           <tr>
                              <td><div align="center"></div></td>
                              <td><div align="center"></div></td>
                              <td><div align="center"></div></td>
                           </tr>
                           <tr>
                              <td><div align="center">Password</div></td>
                              <td> </td>
                              <td><div align="center">
                                    <input name="Password" type="text" size="25" maxlength="25" />
                                   </div>
                              </td>
                           </tr>
                           <tr>
                              <td><div align="center"></div></td>
                              <td> </td>
                              <td><div align="center"></div></td>
                           </tr>
                           <tr>
                              <td><div align="center">
                                <input name="Button_Reset" type="reset" value="Reset Fields" />
                              </div></td>
                              <td> </td>
                              <td><div align="center">
                                   <input name="Button_Submit" type="reset" value="Submit Details" />
                                               <%
          String User_Id=request.getParameter("User_Id")
          String User_Name="";
          String Password="";
          %>
          <%
          try
          sq.connect();
          if(user_Id!==null && User_Id!="")
          ResultSet rs2.sq.execQuery("select User_Name FROM User_Login where User_Id='"+User_Id+"'");
          catch(Exception e)
               out.println("Exception Caught" +e);
               e.printStackTrace();
          %>
                                   </div></td>
                           </tr>
                           </table>
                    </div></td>
                 </tr>
               </table>
          </form>
     </body>
</html>***********************************************************************************************************
File Name Registration_DB.jsp

<%@ language="java" %>
<%@ import="Login.connectionBean" %>
<%@ import="java.sql.*" %>
<%@ import="javax.sql.*" %>
<%@ import="java.io.*" %>
<jsp:useBean id="sq" scope="page" class="Login.connectionBean" type="connectionBean"/>
     <jsp:setProperty name="sq" property="*"/>
<html>
     <head>
          <title>Untitled Document</title>
     </head>
<body>
          <%
          String Button_Submit = request.getParameter("Button_Submit");
          String User_Id = request.getParameter("User_Id");
          String User_Name = request.getParameter("User_Name");
          String Password = request.getParameter("Password");
          %>
          <%!
          ResultSet rs1=null;
          ResultSet rs2=null;
          %>
          <%
          try
               sq.connect();
               if(Button_Submit!=null && Button_Submit!="")
                    String qry="INSERT INTO User_Login (User_Id, User_Name, Password) VALUES('"+User_Id+"','"+User_Name+"','"+Password+"')";
                    int i=sq.executeUpdae(qry);
                    if (i>0)
                         response.sendRedirect("Registration.jsp");
          catch(Exception e)
               out.println("Exception Caught" +e);
               e.printStackTrace();
%>
     </body>
</html>***********************************************************************************************************
File name connectionBean.java
package Login;
import java.sql.*;
public class connectionBean
     private Connection con;
     public connectionBean()
          super();
     public boolean connect() throws ClassNotFoundException, SQLException
           Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
           con=DriverManager.getConnection("jdbc:odbc:JAVA"," "," ");
           return true;
     public void close() throws SQLException
          con.close();
     public ResultSet execQuery(String qry) throws SQLException
          Statement stmt=con.createStatement();
          ResultSet rs=stmt.executeQuery(qry);
          return(rs==null)?null:rs;
     public int execUpdae(String qry) throws SQLException
          Statement stmt=con.createStatement();
          int i=stmt.executeUpdate(qry);
          return(i==0)?0:i;
}

hi
here the problem is tat the server culdnt find the class for u page,
check u hav deployed it properly or not,
check the tomcat installation and is it working fine,
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46:
47:
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50: Transport trans = sess.getTransport();
51: Message msg = new MimeMessage(sess);
52: msg.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
53: msg.setFrom(new InternetAddress(this.email));
54: msg.setSubject(this.nam);
An error occurred at line: 51 in the jsp file: /Mailer1.jsp
MimeMessage cannot be resolved to a type
48: //sess = Session.getDefaultInstance(props);
49: //sess.setDebug(true);
50: Transport trans = sess.getTransport();
51: Message msg = new MimeMessage(sess);
52: msg.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
53: msg.setFrom(new InternetAddress(this.email));
54: msg.setSubject(this.nam);
An error occurred at line: 51 in the jsp file: /Mailer1.jsp
sess cannot be resolved
48: //sess = Session.getDefaultInstance(props);
49: //sess.setDebug(true);
50: Transport trans = sess.getTransport();
51: Message msg = new MimeMessage(sess);
52: msg.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
53: msg.setFrom(new InternetAddress(this.email));
54: msg.setSubject(this.nam);
An error occurred at line: 52 in the jsp file: /Mailer1.jsp
Message.RecipientType.TO cannot be resolved to a type
49: //sess.setDebug(true);
50: Transport trans = sess.getTransport();
51: Message msg = new MimeMessage(sess);
52: msg.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
53: msg.setFrom(new InternetAddress(this.email));
54: msg.setSubject(this.nam);
55: msg.setContent(suggestion, "text/plain");
An error occurred at line: 52 in the jsp file: /Mailer1.jsp
InternetAddress cannot be resolved to a type
49: //sess.setDebug(true);
50: Transport trans = sess.getTransport();
51: Message msg = new MimeMessage(sess);
52: msg.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
53: msg.setFrom(new InternetAddress(this.email));
54: msg.setSubject(this.nam);
55: msg.setContent(suggestion, "text/plain");
An error occurred at line: 53 in the jsp file: /Mailer1.jsp
InternetAddress cannot be resolved to a type
50: Transport trans = sess.getTransport();
51: Message msg = new MimeMessage(sess);
52: msg.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
53: msg.setFrom(new InternetAddress(this.email));
54: msg.setSubject(this.nam);
55: msg.setContent(suggestion, "text/plain");
56: trans.connect();
Stacktrace:
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:93)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:435)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:298)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
i m unable to find out the solution,
please help me to resolve it.
thnaks.

Hi shams.hq,
I don't understand how you bother to copy an application in your server directories. It's really piece of cake to deploy with Tomcat.
All you have to do :
- with Netbeans, you build the project : a WAR file will be created in the dist directory of your project;
- launch the server, if it's not running;
- with your web browser, connect to the Tomcat Manager;
- from there, you may upload and deploy the WAR file of your project.
Et voilà ! Tomcat will unzip the WAR and install your classes and libraries at the right place.

Error while running JSP's on tomcat 4.1.18- org.apache.jasper.JasperExcepti

I am getting the following error when I compile the JSP page. I have set my CLASSPATH correctly, still I am getting the error.Where should I place my class file???
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: 0 in the jsp file: /JspSession_NextPage.jsp
Generated servlet error:
[javac] Compiling 1 source file
D:\Program Files\jakarta-tomcat-4.1.18-LE-jdk14\work\Standalone\localhost\_\JspSession_NextPage_jsp.java:41: cannot resolve symbol
symbol : class UserData
location: class org.apache.jsp.JspSession_NextPage_jsp
UserData user = null;
^
An error occurred at line: 0 in the jsp file: /JspSession_NextPage.jsp
Generated servlet error:
D:\Program Files\jakarta-tomcat-4.1.18-LE-jdk14\work\Standalone\localhost\_\JspSession_NextPage_jsp.java:43: cannot resolve symbol
symbol : class UserData
location: class org.apache.jsp.JspSession_NextPage_jsp
user = (UserData) pageContext.getAttribute("user", PageContext.SESSION_SCOPE);
^
An error occurred at line: 0 in the jsp file: /JspSession_NextPage.jsp
Generated servlet error:
D:\Program Files\jakarta-tomcat-4.1.18-LE-jdk14\work\Standalone\localhost\_\JspSession_NextPage_jsp.java:46: cannot resolve symbol
symbol : class UserData
location: class org.apache.jsp.JspSession_NextPage_jsp
user = (UserData) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "UserData");
^
3 errors
     at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:130)
     at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:293)
     at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:340)
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:352)
     at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:474)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:184)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     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:260)
     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$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline$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:432)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
     at java.lang.Thread.run(Thread.java:536)
Apache Tomcat/4.1.18-LE-jdk14

Have you placed the UserData class in the same directory?

How to reference a DatabaseHandler servlet class from a jsp file in Tomcat

Trying to create a database connection in the jsp file in webapps\project folder by referencing the DatabaseHandler class in webapps\project\WEB-INF\classes.
Here is the code in the jsp to make the connection:
DatabaseHandler db = new DatabaseHandler() ;
String sql = "SELECT password FROM cms_users WHERE user =" + userName ;
java.sql.ResultSet rs = db . selectQuery( sql ) ;
Here is the DatabaseHandler class:
import java.sql.*;
public class DatabaseHandler
     // instance variables - replace the example below with your own
private Connection connection;
     * Constructor for objects of class DatabaseHandler
     public DatabaseHandler()
String url = "jdbc:odbc:javadatabase";
// Load the driver to allow connection to the database
try
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
connection = DriverManager.getConnection( url );
catch ( ClassNotFoundException cnfex )
System.err.println( "Failed to load JDBC/ODBC driver." );
cnfex.printStackTrace();
System.exit( 1 ); // terminate program
catch ( SQLException sqlex )
System.err.println( "Unable to connect" );
sqlex.printStackTrace();
public ResultSet selectQuery( String query )
Statement statement;
ResultSet resultSet = null ;
try
statement = connection.createStatement();
resultSet = statement.executeQuery( query );
catch ( SQLException sqlex )
sqlex.printStackTrace();
System . exit( 1 ) ;
return resultSet ;
Here is the error i am getting when i try to run the jsp script:
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: /ValidateLogon.jsp
Generated servlet error:
[javac] Compiling 1 source file
C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\cms\ValidateLogon_jsp.java:47: cannot find symbol
symbol : class DatabaseHandler
location: class org.apache.jsp.ValidateLogon_jsp
DatabaseHandler db = new DatabaseHandler() ;
^

Just like in the class file you need to import any classes that you want to access in the JSP.
http://java.sun.com/products/jsp/tags/11/syntaxref11.fm7.html

Unable to run JSP file in TOmcat

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