can't access class files

[lochem]

Hi!
I use Tomcat 5.5 on WinXp HomeEd.
I cannot use my .class files in my jsp pages.
I tried several locations for the .class files:
{TomcatHome}\shared\classes\
and
{TomcatHome}\webapps\ROOT\MyApplication\WEB-INF\classes\
and
{TomcatHome}\common\classes\
and
{TomcatHome}\server\classes\
and nothing works!
What should I do to make my .class files visible to the server?
hoping for answer.....

 

[sedj]

This directory seems a bit weird :

{TomcatHome}\webapps\ROOT\MyApplication\WEB-INF\classes\


Do you not mean :

{TomcatHome}\webapps\MyApplication\WEB-INF\classes\ ?

In any case, the best practice is to jar up your classes, and put them in your webapp's WEB-INF/lib directory, or if common to many webapps, in TOMCAT_HOME/common/lib .

Seeing as you do not actually provide any errors, or whether the classes are in packages or not etc, there is not a lot else I can offer.


--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[lochem]

Hi!
Tnx sedj for your reply.
Let me give some more details.
I want to use my class called TBean in my jsp page called t.jsp.
This class is not packed (is not a .jar file)
I get this error:

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 13 in the jsp file: /cos/t.jsp
Generated servlet error:
TBean cannot be resolved or is not a type

An error occurred at line: 13 in the jsp file: /cos/t.jsp
Generated servlet error:
TBean cannot be resolved or is not a type


org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
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)

And I put the TBean.class in directories mentioned in my first message.
What's wrong?

 

[sedj]

You cannot use non-packaged classes.

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[sedj]

I should probably be clearer :

Your class should be in a package, eg :

package com.acme;
class TBean {

}

Its best to archive them into a jar file too, but this is optional.

If you must use them as un-jarred, you should put them in :

TOMCAT_HOME/webapps/YOUR_WEBAPP/WEB-INF/classes/com/acme

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[lochem]

Still have a problem.
I defined my TBean like this:

package com.cos;
public class TBean {

}

I compiled it to TBean.class

Then I put TBean.class to TOMCAT_HOME/webapps/MY_WEBAPP/WEB-INF/classes/com/cos

and in my jsp page I have
<%@ page language="java" contentType="text/html; charSet=UTF-8" import="com.cos.TBean"%>

and I get this error:

org.apache.jasper.JasperException: Unable to compile class for JSP

Generated servlet error:
Only a type can be imported. com.cos.TBean resolves to a package

An error occurred at line: 13 in the jsp file: /myapp/t.jsp
Generated servlet error:
TBean cannot be resolved or is not a type

An error occurred at line: 13 in the jsp file: /myapp/t.jsp
Generated servlet error:
TBean cannot be resolved or is not a type


org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
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)

what's that now?

 

[sedj]

Forget this :

<%@ page language="java" contentType="text/html; charSet=UTF-8" import="com.cos.TBean"%>

Use this :

<%@ page import="com.cos.*" %>

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[lochem]

I put <%@ page import="com.cos.*" %> as you advised
but it doesn't work
I get this error:

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 14 in the jsp file: /myapp/t.jsp
Generated servlet error:
TBean cannot be resolved or is not a type

An error occurred at line: 14 in the jsp file: /myapp/t.jsp
Generated servlet error:
TBean cannot be resolved or is not a type


org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
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)

What else can I do?

 

[sedj]

Have you compiled your com.cos.TBean class correctly ?

The package must be in the correct directory structure.
So if you were compiling it from "/usr/java", your class should be in :

/usr
/java
/com
/cos

and you would compile it so :

From /usr/java :

javac com/cos/TBean.java

This is all standard Java package stuff, and you should know all this before attemping to use any non-standard APIs ....

Your class when in Tomcat should also be in the correct directory, eg :

WEB-INF/classes/com/cos

And I really would jar it all up - it really is best practice.

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[lochem]

Finally!!!
I have solved my problem.
Sedj, you have been very helpful.
I wouldn't do it without your hints.
Thanks again.
Bye!