Bean found at compile but not runtime.

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posted 23 years ago

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I have a jsp which uses a bean. The JSP compiles, but can't find the Bean at runtime. I'm using Tomcat. Perhaps there's a classpath setting that I'm missing, or something?
The jsp is located in d:\java\dev\bg (mapped to localhost\bg)
The Bean (GreenBean) is in package com.intown.bg.beans.
Its class file is located in d:\java\dev\bg\WEB-INF\class\com\intown\bg\beans.

At runtime, I get a "500" error ( javax.servlet.ServletException: Cannot create bean of class GreenBean )
I would appreciate any suggestions.

William Brogden

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posted 23 years ago

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You must give the complete package when naming the class in the useBean tag in addition to importing it. Instead of:
class="GreenBean" />
use
class="com.intown.bg.beans.GreenBean" />
Not every JSP engine seems to require this but Tomcat does.
Bill

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Michael Mendelson

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posted 23 years ago

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Thanks William, that worked.
However, now I'm having the problem that Tomcat does not find some jar files that are present in my development environment. How do I set the classpath there?

William Brogden

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posted 23 years ago

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Tomcat expects to find jar files for a "web application" in a very specific location based on WEB-INF, just like servlet class files.
WEB-INF
+-- classes/ class files go here
+-- lib/ jar files go here
OR if the jar is used by more than one application
tomcat/lib is the place for them.
Tomcat uses specialized loaders for classes, so don't depend on your CLASSPATH environment variable.

Michael Mendelson

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posted 23 years ago

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Thanks, Bill.
That's the problem. In my development environment I have my "general utilities" library in another place.

[This message has been edited by Michael Mendelson (edited February 24, 2001).]

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