Re: AW: Why doesn't this work:
Any idea on how to get rid of this error? Terje K. -- Original Message -- From: Ralph Einfeldt [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] Date: Thu, 31 May 2001 15:46:56 +0200 It looks like request.getParameterValues(paramName) returns a null value on at least one param.
AW: AW: Why doesn't this work:
String[] paramValues = request.getParameterValues(paramName);
if (paramValues == null) {
// Do what you want
} else if (paramValues.length == 1) {
// Do what you want
} else {
// Do what you want
}
-Ursprüngliche Nachricht-
Von: Terje Kristensen [mailto:[EMAIL PROTECTED]]
Gesendet: Freitag, 1. Juni 2001 14:12
An: [EMAIL PROTECTED]
Betreff: Re: AW: Why doesn't this work:
Any idea on how to get rid of this error?
Terje K.
-- Original Message --
From: Ralph Einfeldt [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
Date: Thu, 31 May 2001 15:46:56 +0200
It looks like request.getParameterValues(paramName)
returns a null value on at least one param.
Re: AW: AW: Why doesn't this work:
You have understood it perfectly. To work around it, I put the url with all the parameters in a variable, then ran include on the variable. It worked somewhat, but I got the following output: Title Piping and valve material specification Doc.no. L-SP-200 Operator Sec.no. 6 Material data sheet: VC21 Project.no. Rev.no. D Rev.date 17.03.99 Status: Page: 1 Of: 1 Title Piping and valve material specification Doc.no. L-SP-200 Operator Sec.no. 6 Material data sheet: VC22 Project.no. Rev.no. B Rev.date 01.06.94 Status: Page: 1 Of: 1 Error: 500 Location: /xsql/tek/advanced_section_result.jsp Internal Servlet Error: javax.servlet.ServletException at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:459) at tek._0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fsection_0005fresult_jsp_38._jspService(_0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fsection_0005fresult_jsp_38.java:129) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:177) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404) at org.apache.tomcat.core.Handler.service(Handler.java:286) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484) Root cause: java.lang.NullPointerException at tek._0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fsection_0005fresult_jsp_38._jspService(_0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fsection_0005fresult_jsp_38.java:68) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:177) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404) at org.apache.tomcat.core.Handler.service(Handler.java:286) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484) Any ideas? Terje K.
AW: AW: AW: Why doesn't this work:
Have a look at line 68 of _0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fsecti on_0005fresult_jsp_38.java to find the offendind code the jsp. -Ursprüngliche Nachricht- Von: Terje Kristensen [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 31. Mai 2001 13:38 An: [EMAIL PROTECTED] Betreff: Re: AW: AW: Why doesn't this work: snip/ Root cause: java.lang.NullPointerException at tek._0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspa dvanced_0005fsection_0005fresult_jsp_38._jspService(_0002ftek_ 0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fs ection_0005fresult_jsp_38.java:68) at snip/
Re: AW: AW: AW: Why doesn't this work:
I don't see anything wrong with it. Do you?
package tek;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.util.Vector;
import org.apache.jasper.runtime.*;
import java.beans.*;
import org.apache.jasper.JasperException;
import java.util.*;
public class
_0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fsection_0005fresult_jsp_42
extends HttpJspBase {
static {
}
public
_0002ftek_0002fadvanced_0005fsection_0005fresult_0002ejspadvanced_0005fsection_0005fresult_jsp_42(
) {
}
private static boolean _jspx_inited = false;
public final void _jspx_init() throws JasperException {
}
public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws 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 {
if (_jspx_inited == false) {
_jspx_init();
_jspx_inited = true;
}
_jspxFactory = JspFactory.getDefaultFactory();
response.setContentType(text/html;charset=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:\\xsql\\tek\\advanced_section_result.jsp;from=(0,32);to=(8,0)]
out.write(\r\n\r\nhtml\r\n\thead\r\n\t\ttitleLSP200 - Section
Selection - Result/title\r\n\t/head\r\n\tlink rel=\STYLESHEET\
type=\text/css\ href=\includes/stylesheet.css\/\r\n\tbody
style=\font-family:Tahoma;font-size:8pt;\\r\n);
// end
// begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(8,2);to=(18,4)]
String opn = request.getParameter(opn);
Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()) {
String paramName = (String)paramNames.nextElement();
String[] paramValues = request.getParameterValues(paramName);
if (paramValues.length == 1) {
String paramValue = paramValues[0];
int length = paramValue.length();
String fil = advanced_result_ + paramName +
.xsql?opn= + opn + + paramName + = + paramValue.substring(1,length) + +
paramName + R= + paramValue.substring(0,1);
// end
// HTML // begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(18,6);to=(19,5)]
out.write(\r\n\t\t\t \t);
// end
// begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(19,5);to=(19,50)]
{
String _jspx_qStr = ;
pageContext.include( fil + _jspx_qStr);
}
// end
// HTML // begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(19,50);to=(20,0)]
out.write(\r\n);
// end
// begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(20,2);to=(23,3)]
if (paramValue.length() == 0) {
// end
// HTML // begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(23,5);to=(23,10)]
out.write(error);
// end
// begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(23,12);to=(29,4)]
}
} else {
for(int i=0; iparamValues.length; i++) {
int length = paramValues[i].length();
String fil = advanced_result_ + paramName +
.xsql?opn= + opn + + paramName + = + paramValues[i].substring(1,length) +
+ paramName + R= + paramValues[i].substring(0,1);
// end
// HTML // begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(29,6);to=(30,5)]
out.write(\r\n\t\t\t \t);
// end
// begin
[file=C:\\xsql\\tek\\advanced_section_result.jsp;from=(30,5);to=(30,50)]
Re: AW: AW: AW: Why doesn't this work:
Title: Re: AW: AW: AW: Why doesn't this work:
2 comments:
1. you can insert a
% try { %
at the beginning of your jsp and then
% } catch (NullPointerException npe)
{
System.err.println(***);
npe.printStackTrace();
}
%
at the end of your code.
This will give you the exact line in the jsp. The line number given in the 'root cause' was not the same for the null pointer that I had.
2. The line
String[] paramValues = request.getParameterValues(paramName);
can return null(if there are no values), and your next line, if (paramValues.length == 1), could be throwing the null pointer exception since paramValues is null.
Charlie
-Original Message-
From: Terje Kristensen [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 31, 2001 9:37 AM
To: [EMAIL PROTECTED]
Subject: Re: AW: AW: AW: Why doesn't this work:
I don't see anything wrong with it. Do you?
AW: Why doesn't this work:
It looks like request.getParameterValues(paramName) returns a null value on at least one param. -Ursprüngliche Nachricht- Von: Terje Kristensen [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 31. Mai 2001 15:37 An: [EMAIL PROTECTED] Betreff: Re: AW: AW: AW: Why doesn't this work: I don't see anything wrong with it. Do you?
AW: Why doesn't this work:
Are there no log messages from tomcat ? How do you know that the jsp:include ../ is not working? It might be working and the error is in the included page. To verify that, you could strip down the included page to something like: % log(this.getClass().getName() + : I'm included); % and see if this message makes it to the log. Another thing you can check is, if there is a generated java file and it's compiled version for your included jsp. -Ursprüngliche Nachricht- Von: Terje Kristensen [mailto:[EMAIL PROTECTED]] Gesendet: Mittwoch, 30. Mai 2001 09:30 An: '[EMAIL PROTECTED]' Betreff: Why doesn't this work: Could anyone tell my why the jsp:include doesn't work? I'm getting an 500 error. snip/
Re: AW: Why doesn't this work:
I did what you asked me, and the files did get included, but it doesn't tell me much.
To try an clear what I am trying to do:
I want this url:
http://localhost:8080/xsql/tek/advanced_section_result.jsp?opn=1PCS=0AC10APCS=AAC10A
To do this:
(info 1)
jsp:include page=advanced_result_PCS.xsql flush=true
jsp:param name=opn value=1/
jsp:param name=PCS value=AC10A/
jsp:param name=PCSR value=0/
/jsp:include
jsp:include page=advanced_result_PCS.xsql flush=true
jsp:param name=opn value=1/
jsp:param name=PCS value=AC10A/
jsp:param name=PCSR value=A/
/jsp:include
By doing so:
(info 2)
%@ page import=java.util.* %
%
String opn = request.getParameter(opn);
Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()) {
String paramName = (String)paramNames.nextElement();
String[] paramValues = request.getParameterValues(paramName);
if (paramValues.length == 1) {
String paramValue = paramValues[0];
if (paramValue.length() == 0) {
%error%
}
} else {
for(int i=0; iparamValues.length; i++) {
int length = paramValues[i].length();
String fil = advanced_result_ + paramName + .xsql;
%
jsp:include page=%= fil % flush=true
jsp:param name=opn value=%= opn %/
jsp:param name=%= paramName % value=%=
paramValues[i].substring(1,length) %/
jsp:param name=%= paramName %R value=%=
paramValues[i].substring(0,1) %/
/jsp:include
%
}
}
} %
This gets me an error. If i type in info 1 it works perfectly, but when i try to do
info 2 gives me an error.
What to do?
Terje
snip
-- Original Message --
From: Ralph Einfeldt [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
Date: Wed, 30 May 2001 10:31:00 +0200
Are there no log messages from tomcat ?
How do you know that the jsp:include ../ is not working?
It might be working and the error is in the included page.
To verify that, you could strip down the included page
to something like:
%
log(this.getClass().getName() + : I'm included);
%
/snip
AW: AW: Why doesn't this work:
Sorry, but I'm not shure that I understand right.
To verify that I unstood well so far:
- Your code sniplet (info 2) is from the source
advanced_section_result.jsp
- info 1 is the desired effect of the for loop
in advanced_section_result.jsp
- If you directly use the sniplet info 1 instead of the
loop everything works
- If you remove the inside the include, the code
that is generated looks like info 1 without
BTW:
int length = a.length();
a.substring(1,length);
is equivalent with
a.substring(1);
-Ursprüngliche Nachricht-
Von: Terje Kristensen [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 30. Mai 2001 14:25
An: [EMAIL PROTECTED]
Betreff: Re: AW: Why doesn't this work:
I did what you asked me, and the files did get included, but
it doesn't tell me much. To try an clear what I am trying to do:
I want this url:
http://localhost:8080/xsql/tek/advanced_section_result.jsp?opn
=1PCS=0AC10APCS=AAC10A
To do this:
(info 1)
jsp:include page=advanced_result_PCS.xsql flush=true
jsp:param name=opn value=1/
jsp:param name=PCS value=AC10A/
jsp:param name=PCSR value=0/
/jsp:include
jsp:include page=advanced_result_PCS.xsql flush=true
jsp:param name=opn value=1/
jsp:param name=PCS value=AC10A/
jsp:param name=PCSR value=A/
/jsp:include
By doing so:
(info 2)
%@ page import=java.util.* %
%
String opn= request.getParameter(opn);
Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()) {
String paramName = (String)paramNames.nextElement();
String[] paramValues = request.getParameterValues(paramName);
if (paramValues.length == 1) {
String paramValue = paramValues[0];
if (paramValue.length() == 0) {
%error%
}
} else {
for(int i=0; iparamValues.length; i++) {
int length = paramValues[i].length();
String fil = advanced_result_ +
paramName + .xsql;
%
jsp:include page=%= fil %
flush=true
jsp:param name=opn
value=%= opn %/
jsp:param name=%=
paramName % value=%= paramValues[i].substring(1,length) %/
jsp:param name=%=
paramName %R value=%= paramValues[i].substring(0,1) %/
/jsp:include
%
}
}
} %
This gets me an error. If i type in info 1 it works
perfectly, but when i try to do info 2 gives me an error.
What to do?
Terje
