northfield Sid

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since Aug 08, 2002

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Recent posts by northfield Sid

cannot compile servlet code

>Are you compiling from the command line?
Yes.
>If so, did you add a copy of servlet.jar to %JAVA_HOME%\jre\lib\ext\ ?
No, but I have now, and it works.
I have in previous occasions installed classpath but on latest installations have not since I was advised by many from the forum not to.
Thanks
I will also be hopefully be learning ANT very soon.

22 years ago

Servlets

cannot compile servlet code

In XP you can set the path by rightclicking on my computer - then go to environment vairables and edit the path but I cannot see any for classpath???
What is the easist way yo use the class path?
----------------------------------------------
Thanks Brogdan,
I want to read ANT, but as you said there is a learning curve, so I think I will do in a months time.

22 years ago

Servlets

cannot compile servlet code

I cannot compile Servlet files on my WinXP environment.
my servlet.jar file is located at
c:\tomcat\jakarta-tomcat-3.3.1\common\lib\servlet.jar
what shall I do?
The error messages are only for servlet portion of code?

22 years ago

Servlets

question on web.xml

Do I put the web.xml file in the WEB-INF folder, that is at the same level as classes folder?

22 years ago

JSP

Plz help, code is provided.

>Which is line 133
> // Print out the type and file name of each row. while(ftplrs.next()) {

22 years ago

JSP

Plz help, code is provided.

I am getting this error:
Root cause:
java.lang.NullPointerException
at jsp.portal_0002dproject.processviewfiles_dir_1._jspService(processviewfiles_dir_1.java:133)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Thread.java:536)

This is the code as generated by tomcat:

package jsp.portal_0002dproject;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import portalftp.* ;
public class processviewfiles_dir_1 extends org.apache.jasper.runtime.HttpJspBase {
// begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(7,0);to=(7,72)]
// end
static {
}
public processviewfiles_dir_1( ) {
}
private boolean _jspx_inited = false;
public final synchronized void _jspx_init() throws org.apache.jasper.JasperException {
if (! _jspx_inited) {
_jspx_inited = true;
}
}
public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws java.io.IOException, ServletException {
JspFactory _jspxFactory = null;
PageContext pageContext = null;
HttpSession session = null;
ServletContext application = null;
ServletConfig config = null;
JspWriter out = null;
Object page = this;
String _value = null;
try {
try {
_jspx_init();
_jspxFactory = JspFactory.getDefaultFactory();
response.setContentType("text/html;charset=ISO-8859-1");
pageContext = _jspxFactory.getPageContext(this, request, response,
"", true, 8192, true);
application = pageContext.getServletContext();
config = pageContext.getServletConfig();
session = pageContext.getSession();
out = pageContext.getOut();
// HTML // begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(0,0);to=(6,0)]
out.write("<html>\r\n<head>\r\n <title> processviewfiles_dir.jsp </title>\r\n</head>\r\n<body>\r\n\r\n");
// end
// HTML // begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(6,34);to=(7,0)]
out.write("\r\n");
// end
// begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(7,0);to=(7,72)]
portalftp.PortalFtp ftpbean = null;
boolean _jspx_specialftpbean = false;
synchronized (session) {
ftpbean= (portalftp.PortalFtp)
pageContext.getAttribute("ftpbean",PageContext.SESSION_SCOPE);
if ( ftpbean == null ) {
_jspx_specialftpbean = true;
try {
ftpbean = (portalftp.PortalFtp) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "portalftp.PortalFtp");
} catch (Exception exc) {
throw new ServletException (" Cannot create bean of class "+"portalftp.PortalFtp", exc);
}
pageContext.setAttribute("ftpbean", ftpbean, PageContext.SESSION_SCOPE);
}
}
if(_jspx_specialftpbean == true) {
// end
// begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(7,0);to=(7,72)]
}
// end
// HTML // begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(7,72);to=(9,47)]
out.write("\r\n\r\n<b>The files and folders in the directory path ");
// end
// begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(9,50);to=(9,89)]
out.print( request.getParameter("directorypath") );
// end
// HTML // begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(9,91);to=(11,0)]
out.write(" are: </b><br>\r\n\r\n");
// end
// begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(11,2);to=(43,0)]
String directorypath = null;
PortalParseResult ftplrs = null;
try
{
directorypath = request.getParameter("directorypath");
}
catch(Exception e)
{
out.print("There has been an error with information that has been typed." + "<br>");
out.print("Please check directory path." + "<br>");
out.print("Please check if directory exists." + "<br>");
}
try
{
ftpbean.setDirectory(directorypath);
}
catch(Exception e)
{
out.print("There has been an error with path information." + "<br>");
out.print("Please check directory path and your folder access rights." + "<br>");
}
try{
ftplrs = ftpbean.getDirectoryContent();
}
catch(Exception e)
{
out.print("There has been an error with the file and directories class.");
}
// end
// HTML // begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(43,2);to=(45,0)]
out.write("\r\n<textarea name=\"showDirectoryContent\" rows=\"10\" cols=\"70\">\r\n");
// end
// begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(45,2);to=(68,0)]
// Print out the type and file name of each row.
while(ftplrs.next())
{
int type = ftplrs.getType();
if(type == PortalParseResult.DIRECTORY)
{
out.print("DIR\t");
}
else if(type == PortalParseResult.FILE)
{
out.print("FILE\t");
}
else if(type == PortalParseResult.LINK)
{
out.print("LINK\t");
}
else if(type == PortalParseResult.OTHERS)
{
out.print("OTHER\t");
}
out.println(ftplrs.getName());
}
// end
// HTML // begin [file="C:\\tomcat\\jakarta-tomcat-3.3.1\\webapps\\myJSPs\\jsp\\portal-project\\processviewfiles_dir.jsp";from=(68,2);to=(77,7)]
out.write("\r\n</textarea>\r\n\r\n\r\n<p> Do you wish to <a href=\"processftplogoff.jsp\">log off?</a></p>\r\n\r\n<p> Or use more <a href=\"preferences.jsp\">grid ftp facility?</a></p>\r\n\r\n</body>\r\n</html>");
// end
} catch (Exception ex) {
if (out != null && out.getBufferSize() != 0)
out.clearBuffer();
if (pageContext != null) pageContext.handlePageException(ex);
} catch (Error error) {
throw error;
} catch (Throwable throwable) {
throw new ServletException(throwable);
}
} finally {
if (out instanceof org.apache.jasper.runtime.JspWriterImpl) {
((org.apache.jasper.runtime.JspWriterImpl)out).flushBuffer();
}
if (_jspxFactory != null) _jspxFactory.releasePageContext(pageContext);
}
}
}

please help???
I have been unable to solve this problem now for a very long time.
Below is my JSP which I call processviewfiles_dir.jsp

<html>
<head>
<title> processviewfiles_dir.jsp </title>
</head>
<body>
<%@ page import= "portalftp.* " %>
<jsp:useBean class="portalftp.PortalFtp" id="ftpbean" scope="session" />
<b>The files and folders in the directory path <%= request.getParameter("directorypath") %> are: </b><br>
<%
String directorypath = null;
PortalParseResult ftplrs = null;
try
{
directorypath = request.getParameter("directorypath");
}
catch(Exception e)
{
out.print("There has been an error with information that has been typed." + "<br>");
out.print("Please check directory path." + "<br>");
out.print("Please check if directory exists." + "<br>");
}
try
{
ftpbean.setDirectory(directorypath);
}
catch(Exception e)
{
out.print("There has been an error with path information." + "<br>");
out.print("Please check directory path and your folder access rights." + "<br>");
}
try{
ftplrs = ftpbean.getDirectoryContent();
}
catch(Exception e)
{
out.print("There has been an error with the file and directories class.");
}
%>
<textarea name="showDirectoryContent" rows="10" cols="70">
<%
// Print out the type and file name of each row.
while(ftplrs.next())
{
int type = ftplrs.getType();
if(type == PortalParseResult.DIRECTORY)
{
out.print("DIR\t");
}
else if(type == PortalParseResult.FILE)
{
out.print("FILE\t");
}
else if(type == PortalParseResult.LINK)
{
out.print("LINK\t");
}
else if(type == PortalParseResult.OTHERS)
{
out.print("OTHER\t");
}
out.println(ftplrs.getName());
}
%>
</textarea>
<p> Do you wish to <a href="processftplogoff.jsp">log off?</a></p>
<p> Or use more <a href="preferences.jsp">grid ftp facility?</a></p>
</body>
</html>

I would be grateful for any suggestion, ideas,
and criticism of code. Please let me know if the code be better written etc???

22 years ago

JSP

please help with sincere plea??

I swear I have tried the program at home now three times and each time it works fine.
I am totally lost for ideas, why it should not be working at the other location?

22 years ago

JSP

please help with sincere plea??

I have so far tried many times to make a program work at another location. Now I am totally lost for ideas.
The program works at home but when I try it in a networked computer everything fails. I do not know why.
I would be grateful if someone would look at my code and test it. Please reply to me here so that I could perhaps send the code.
I would be eternally grateful.
Thank you in advance.
Here is the error, which I get only at the deployment location:
Error: 500
Location: /myJSPs/jsp/portal-project/processviewfiles_dir.jsp
Internal Servlet Error:
javax.servlet.ServletException
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:460)
at jsp.portal_0002dproject.processviewfiles_dir_4._jspService(processviewfiles_dir_4.java:163)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Thread.java:536)
Root cause:
java.lang.NullPointerException
at jsp.portal_0002dproject.processviewfiles_dir_4._jspService(processviewfiles_dir_4.java:133)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Thread.java:536)

22 years ago

JSP

The program is not working, urgent help, please

Urgent please help.
I need to solve or I will be in big trouble.
This program works at my home computer.
The hard disk was put onto another computer at another location. Here my program worked but I have tried the same program today but it does not work. Why do I receive this error message???

Error: 500
Location: /myJSPs/jsp/portal-project2/processviewfiles_dir.jsp
Internal Servlet Error:
javax.servlet.ServletException
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:460)
at jsp.portal_0002dproject2.processviewfiles_dir_1._jspService(processviewfiles_dir_1.java:162)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Thread.java:536)
Root cause:
java.lang.NullPointerException
at jsp.portal_0002dproject2.processviewfiles_dir_1._jspService(processviewfiles_dir_1.java:132)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Thread.java:536)

22 years ago

JSP

Need help with web.xml file

I want to create an web.xml page
I frequently access a servlet page with this command:
response.sendRedirect("http://localhost:8080/myJSPs/servlet/portalftp.ServletFaillogin");
Is it possible to avoid typing this tedious line by using the web.xml file?
Here is what I have tried:

so thus the code now becomes:
response.sendRedirect("http://localhost:8080/myJSPs/servlet/faillog");
2nd question:
I have put the web.xml file at this location:
C:\tomcat\jakarta-tomcat-3.3.1\webapps\myJSPs-XML\WEB-INF
The file ServletFaillogin.java and rest of Java pages are at:
C:\tomcat\jakarta-tomcat-3.3.1\webapps\myJSPs-XML\WEB-INF\classes\portalftp
and all my HTML and JSP pages are at:
C:\tomcat\jakarta-tomcat-3.3.1\webapps\myJSPs-XML\jsp\portal-project

22 years ago

Servlets

How can I call a Servlet from a JSP page?

Okay I have tried 3 version. I have managed to make one version work using the redirect as suggested but not with the other two why???
response.sendRedirect("http://localhost:8080/myJSPs/servlet/portal.ServletSetDirectoryError");
This works. But the others do not why???
When I do
request.getRequestDispatcher("http://localhost:8080/myJSPs/servlet/portal.ServletSetDirectoryError").forward(request, response);
I get a blank file in the browser and in the status bar the word "DONE"
I have also tried another style:
<jsp:forward page="/myJSPs/servlet/portal.ServletSetDirectoryError" />
Here is get the same blank file and in the status bar the word "DONE"
Why???

22 years ago

JSP

How can I call a Servlet from a JSP page?

Okay I have changed the line of code to:

I think this could be becuase of the line
" "
All my html and JSP pages are at:
C:\tomcat\jakarta-tomcat-3.3.1\webapps\myJSPs-XML\jsp\portal-project
My class files are at:
C:\tomcat\jakarta-tomcat-3.3.1\webapps\myJSPs-XML\WEB-INF\classes\portal
within the folder portal I have the class:
"ServletFaillogin.java"
But then there is an error loggin into system it does not display my ServletFaillogin page. Instead gives me:
HTTP 404 - File not found
Internet Explorer
Why is this???

22 years ago

JSP

How can I call a Servlet from a JSP page?

I am using jsp:forward as an JSP tag but getting errors:
Please help

Here is the error:
org.apache.jasper.JasperException: Unable to compile Note: sun.tools.javac.Main has been deprecated.
C:\tomcat\jakarta-tomcat-3.3.1\work\DEFAULT\myJSPs\jsp\portal_0002dproject\processftplogin_1.java:94: Missing term.
{
^
C:\tomcat\jakarta-tomcat-3.3.1\work\DEFAULT\myJSPs\jsp\portal_0002dproject\processftplogin_1.java:95: Missing term.

^
C:\tomcat\jakarta-tomcat-3.3.1\work\DEFAULT\myJSPs\jsp\portal_0002dproject\processftplogin_1.java:95: Missing term.

^
C:\tomcat\jakarta-tomcat-3.3.1\work\DEFAULT\myJSPs\jsp\portal_0002dproject\processftplogin_1.java:95: ';' expected.

^
4 errors, 1 warning

22 years ago

JSP

How can I call a Servlet from a JSP page?

Thank you

22 years ago

JSP

How can I call a Servlet from a JSP page?

How do I call a Servlet from a JSP page?
I have an JSP page that does a few things but when there is an error I need the JSP page to call a Servlet but do not know how to do it.
I want to call a ServletFailLogin from a JSP page how can I do it?
<html><head>
<title> Login Page </title>
</head>
<body>
<%@ page import= "portal.* " %>
<jsp:useBean class="portal.PortalSystem" id="bean" scope="session" />
<% try
{
String servername = request.getParameter("servername");
String username = request.getParameter("username");
String password = request.getParameter("password");
ftpbean.ftpConnect(servername, username, password);
}
catch(Exception e)
{
"http://localhost:8080/test/servlet/ServletFaillogin";
}
%>
...
<h1> You have successfully logged in. </h1>
...
</body>
</html>

22 years ago

JSP