Problem compiling simple servlet

I am trying to compile a very simple servlet.
When I do, I get the following error message:
Package javax.servlet does not exist
I am using the Java 2 SDK, Standard Edition Version 1.3.1.
I have downloaded the servlet api (zip file servletapi2_1_1win.zip)
from Sun's site. I unzipped these files in my lib directory; there are two folders,
one called api and the other called src. Api and Src directories have their own
sub-folders, javax/servlet/http etc.
I am using W2K ; I had to create a CLASSPATH system variable in the environment
variables section of control panel since there was none defined.
I added the following line:
C:\jdk1.3.1_01\lib\api\javax\servlet;C:\jdk1.3.1_01\lib\api\javax\servlet\http;
I also did this for the PATH statement..
My servlet looks like this:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class howdy extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<HTML>");
out.println("<HEAD><TITLE>Hello World </TITLE></HEAD>");
out.println("<BODY>");
out.println("<BIG>Hello World </BIG>");
out.println("</BODY></HTML>");

Thanks. I was able to figure it out by specifying the
full classpath
at the command line, like this:
C:> javac -classpath
C:\jdk1.3.1_01\lib\servletapi2_1_1-win.zip\MyServlet.ja
a
Apparantly the system doesn't acknowledge the
environmental variable that
I created in the control panel; also I have no
autoexec.bat file...so it
looks like I have to write out the full path whenever
I need to compile
something. Kind of bothersome, but at least it
works.
You shouldn't have to do this. What operating system are you using?
If you are using win2000, winNT or winxp, you should set the classpath in your system environment varialbes. You can also make a config.bat file and put everything in there. Then just run this config.bat file to set up your environment once for every session.
Here's a file that I have set up on one of our NT machines. I just double click the icon for this file on my shortcut, and it gives me the window where I can compile my java programs.
Hope this helps.
Kamran
=========== File SetJava.bat ============
set PATH=%PATH%;m:\jdk1.3\bin
set CLASSPATH=m:\jdk1.3\jre\lib;m:\jdk1.3\jaxp-1.1\jaxp.jar;m:\jdk1.3\jaxp-1.1\crimson.jar;m:\jdk1.3\jaxp-1.1\xalan.jar;.
cd cis235
%SystemRoot%\system32\cmd.exe

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==========
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========
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sun-web.xml
===========
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 8.0 Servlet 2.4//EN" "http://www.sun.com/software/appserver/dtds/sun-web-app_2_4-0.dtd">
<sun-web-app xmlns="http://java.sun.com/xml/ns/j2ee">
<context-root>/HelloWorldApp</context-root>
<session-config>
<session-manager persistence-type="memory">
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<store-properties/>
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<session-properties/>
<cookie-properties/>
</session-config>
<cache enabled="false" max-entries="4096" timeout-in-seconds="30">
<default-helper/>
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<jsp-config/>
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C:\Sun\AppServer\domains\domain1\applications\j2ee-modules\HelloWorldApp\
|
|
|               |               |               |
|               |               |               |
META-INF          WEB-INF          HelloWorld.java          index.html
               |
               |
          |          |          |          |
          |          |          |          |
     classes          sun-web.xml     web.xml          sun-j2ee-ri-project
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     |
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Yes, you need to add a servlet -mapping element and adjust your form to submit to the appropriate URL mapping.
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Having problems compiling *.java with import javax.servlet.jsp......

I've been trying to do the tutorials in a book titled Apache Jakarta-Tomcat as part of my introduction to JSP. I'm new to Java but do know the basics. I have on my machine Java 1.3, Java 1.4, Java FrameWorks 2.1 and Jython 2.1 on Win2000 Pro. So enough about my configuration. I have never worked with packages also.
I downloaded the files from the books site due to the fact I make a lot of typos when hand coding Java (I've become a pretty good debugger of my own code). But everytime I go to compile the *.java I get error messages. So below you will find HelloTag.java and beneath that the error messages that are thrown when I try and compile it. I tested other bits of *.java and have had no problem compiling them. Is there a JSP module I'm missing?
Am I doing something wrong or am I missing something from my configuration.
Marijan Madunic
package chapter2;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.TagSupport;
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public void HelloTag() {
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try {
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catch (Exception e) {
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// a Tag Body
return SKIP_BODY;
public void release() {
// Call the parent's release to release any resources
// used by the parent tag.
// This is just good practice for when you start creating
// hierarchies of tags.
super.release();
D:\Java\JDK 1.3\bin>javac HelloTag.java
HelloTag.java:3: cannot resolve symbol
symbol : class JspException
location: package jsp
import javax.servlet.jsp.JspException;
^
HelloTag.java:4: cannot resolve symbol
symbol : class JspTagException
location: package jsp
import javax.servlet.jsp.JspTagException;
^
HelloTag.java:5: cannot resolve symbol
symbol : class TagSupport
location: package tagext
import javax.servlet.jsp.tagext.TagSupport;
^
HelloTag.java:7: cannot resolve symbol
symbol : class TagSupport
location: class chapter2.HelloTag
public class HelloTag extends TagSupport
^
HelloTag.java:14: cannot resolve symbol
symbol : class JspException
location: class chapter2.HelloTag
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^
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symbol : variable pageContext
location: class chapter2.HelloTag
pageContext.getOut().print("Hello");
^
HelloTag.java:24: cannot resolve symbol
symbol : class JspTagException
location: class chapter2.HelloTag
throw new JspTagException(e.getMessage());
^
HelloTag.java:28: cannot resolve symbol
symbol : variable SKIP_BODY
location: class chapter2.HelloTag
return SKIP_BODY;
^
HelloTag.java:37: cannot resolve symbol
symbol : variable super
location: class chapter2.HelloTag
super.release();
^
9 errors

Well, it looks like you've not got the servlet development kit JAR on your classpath. I think it'll probably be called servlet.jar on your system. Add that to the classpath if it's not already there.
Incidentally, you've bumped into one of the areas Java's slightly lenient - declaring a method that looks like a constructor:
public HelloTag() { }
public void HelloTag() { }The first is a constructor, the second is a normal method. I'm assuming you intended to have the former instead of the latter.
Anyway, hope this helps.

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C:\Programmi\Apache Software Foundation\Tomcat 6.0\webapps\ROOT\WEB-INF\classes>
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import javax.servlet.*;
import java.io.*;
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public class BeanRicercaUtente
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i would be glad to get help about it...! :) thanks!

i am sorry, but in the first class i have not written "import JavaBean.BeanRicercaUtente;"
i have only these imports...
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;

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ok
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import javax.servlet.*;
import javax.servlet.http.*;
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public void init(ServletConfig config) throws ServletException
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Senthil Babu J

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at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled
Code)
Mon Jul 24 12:13:13 PDT 2000:<E> <ServletContext-General> Servlet failed
with Ex
ception
I dont think there were any problems in the classpath or
servletpath;Basically WeblogicServer was able to locate the servlet but when
it tried to load the servlet it gave this exception.
I would appreciate any ideas/suggestions.
Thanks,
Sravan

Nice to hear it works!
However, one mistake you have in the configuration you provided:
You put D:\weblogic\BDL\servletclasses in both CLASSPATH and
weblogic.class.path, remove it from CLASSPATH.
Cheers - Wei
Sravan Thella <[email protected]> wrote in message
news:[email protected]...
Hi Michael and Wei,
Thank you very much for the response.
My servlet details:
Name - HelloWorld2.class
package - examples.servlets
Location - d:\weblogic\BDL\servletclasses ---- here BDL is my new folder
where I want to keep my servlets
My CLASSPATH(environment) settings:
D:\weblogic\BDL\servletclasses;d:\weblogic\classes\boot;d:\weblogic\eval\clo
>
udscape\lib\cloudscape.jar;d:\weblogic\lib\poolorb.jar;D:\java\jre\lib\rt.ja
r;
my weblogic classpath settings(set it thru wlconfig)
D:\weblogic\BDL\servletclasses;d:\weblogic\classes\boot;d:\weblogic\eval\clo
>
udscape\lib\cloudscape.jar;d:\weblogic\lib\poolorb.jar;D:\java\jre\lib\rt.ja
r;
My weblogic.policy:
grant codeBase "file:d:/weblogic/-" {
permission java.io.FilePermission "d:${/}weblogic${/}-",
"read,write,delete,execute";
permission java.net.SocketPermission "localhost:1-9000",
"connect,accept,listen,resolve";
permission java.awt.AWTPermission "accessClipboard";
permission java.awt.AWTPermission "accessEventQueue";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner";
permission java.io.SerializablePermission"enableSubclassImplementation";
permission java.io.SerializablePermission "enableSubstitution";
permission java.lang.RuntimePermission "accessClassInPackage.*";
permission java.lang.RuntimePermission "accessDeclaredMembers.*";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "createSecurityManager";
permission java.lang.RuntimePermission "defineClassInPackage.*";
permission java.lang.RuntimePermission "exitVM";
permission java.lang.RuntimePermission "getClassLoader";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "getProtectionDomain";
permission java.lang.RuntimePermission "loadLibrary.*";
permission java.lang.RuntimePermission "modifyThread";
permission java.lang.RuntimePermission "modifyThreadGroup";
permission java.lang.RuntimePermission "readFileDescriptor";
permission java.lang.RuntimePermission "setContextClassLoader";
permission java.lang.RuntimePermission "setFactory";
permission java.lang.RuntimePermission "setIO";
permission java.lang.RuntimePermission "setProtectionDomain";
permission java.lang.RuntimePermission "setSecurityManager";
permission java.lang.RuntimePermission "writeFileDescriptor";
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.net.NetPermission "requestPasswordAuthentication";
permission java.net.NetPermission "setDefaultAuthenticator";
permission java.security.SecurityPermission "getPolicy";
permission java.security.SecurityPermission "setPolicy";
permission java.util.PropertyPermission "*", "read,write";
grant codeBase "file:d:/weblogic/BDL/servletclasses/-" {
permission java.io.FilePermission
"d:${/}weblogic${/}BDL{/}servletclasses{/}-", "read,write,delete,execute";
permission java.net.SocketPermission "localhost:1-9000",
"connect,accept,listen,resolve";
permission java.awt.AWTPermission "accessClipboard";
permission java.awt.AWTPermission "accessEventQueue";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner";
permission java.io.SerializablePermission"enableSubclassImplementation";
permission java.io.SerializablePermission "enableSubstitution";
permission java.lang.RuntimePermission "accessClassInPackage.*";
permission java.lang.RuntimePermission "accessDeclaredMembers.*";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "createSecurityManager";
permission java.lang.RuntimePermission "defineClassInPackage.*";
permission java.lang.RuntimePermission "exitVM";
permission java.lang.RuntimePermission "getClassLoader";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "getProtectionDomain";
permission java.lang.RuntimePermission "loadLibrary.*";
permission java.lang.RuntimePermission "modifyThread";
permission java.lang.RuntimePermission "modifyThreadGroup";
permission java.lang.RuntimePermission "readFileDescriptor";
permission java.lang.RuntimePermission "setContextClassLoader";
permission java.lang.RuntimePermission "setFactory";
permission java.lang.RuntimePermission "setIO";
permission java.lang.RuntimePermission "setProtectionDomain";
permission java.lang.RuntimePermission "setSecurityManager";
permission java.lang.RuntimePermission "writeFileDescriptor";
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.net.NetPermission "requestPasswordAuthentication";
permission java.net.NetPermission "setDefaultAuthenticator";
permission java.security.SecurityPermission "getPolicy";
permission java.security.SecurityPermission "setPolicy";
permission java.util.PropertyPermission "*", "read,write";
I dont know what is wrong here. In the weblogic.policy file,I tried
differrent combinations but it never worked.
I find weblogic documentation for troubleshooting to be pathetic.Notuseful
at all.Documentation looks
good to read ;not for practical purposes.I'm not sure whether others have
similar opinion.
I'm stuck at this thing for the past few days,I still have lot of work todo
to purusue our management team to buy weblogic
but I'm still stuck at this thing.
Thank you very much for your time.
Thanks,
Sravan
"Sravan Thella" <[email protected]> wrote in message
news:[email protected]...
Hi,
I'm new to weblogic server.I'm trying to setup weblogic 510.Everything
was
going fine until I got stuck to this small thing.I'm not able to load a
simple servlet!.
I would appreciate any pointers regarding this.Please Help me!!!
Here is what I tried:
I have installed weblogic510 plug-in for IIS.I could successfully runjsp
files.However I am not able to load simple servlets;It gave an exception
"java.lang.IllegalAccessError: try to access class
weblogic/utils/classloaders/FileSource from class
weblogic/servlet/internal/WarClassFinder"
Details of my configuration:
WebServer - IIS 4.0
IIS port=80
Weblogic port=7001
I had set it in such a way that all the requests first go to IIS andthen
IIS redirects them to Weblogic.I've followed the steps according to the
document "Installing the Weblogic ISAPI Plug-in".
I've registered the servlet in weblogic.properties as following:
weblogic.httpd.register.hello=examples.servlets.HelloWorld2
I tested the servlet by URL http://localhost:7001/hello
Following is the eact text for the exception I got in the WeblogicServer
window:
Mon Jul 24 12:13:13 PDT 2000:<E> <ServletContext-General> Error loading
servlet:
examples.servlets.HelloWorld2
java.lang.IllegalAccessError: try to access class
weblogic/utils/classloaders/Fi
leSource from class weblogic/servlet/internal/WarClassFinder
at
weblogic.servlet.internal.WarClassFinder.getSource(WarClassFinder.jav
a, Compiled Code)
at
weblogic.servlet.internal.WarClassFinder.getClassSource(WarClassFinde
r.java:110)
at
weblogic.utils.classloaders.GenericClassLoader.findLocalClass(Generic
ClassLoader.java:381)
at
weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
cClassLoader.java, Compiled Code)
at
weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$Slave.
loadClass(RecursiveReloadOnModifyClassLoader.java:234)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:146)
at
weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader.findLo
calClass(RecursiveReloadOnModifyClassLoader.java:109)
at
weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
cClassLoader.java, Compiled Code)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:172)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:146)
at
weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubI
mpl.java:291)
at
weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
java:164)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:99)
at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
textImpl.java:742)
at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
textImpl.java:686)
at
weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
ContextManager.java:247)
at
weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
a:361)
at
weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java,Compiled
Code)
Mon Jul 24 12:13:13 PDT 2000:<E> <ServletContext-General> Servlet failed
with Ex
ception
I dont think there were any problems in the classpath or
servletpath;Basically WeblogicServer was able to locate the servlet butwhen
it tried to load the servlet it gave this exception.
I would appreciate any ideas/suggestions.
Thanks,
Sravan

Problem compiling simple servlet

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