Hi,

I am using Hibernate in a Struts based webapplication. I've created all the mappings, and when I try to use Hibernate in a normal Java program, it works great.

Now I'm trying to use the hibernate capabilities in my web application, but each time a get an error. I went looking in the error log of my server, and there it says that it cant found my jdbc Driver class.

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

I am using eclipse, and imported the .jar file of my database connector as an external jar file. As mentioned above, this works in a normal java program. Why doesnt this work in a webapplication ? Doesn 't the external jar file get deployed or something ? I must say, I'm not much of a java build path guru, so i guess it has to do something with that.

Any suggestions ?

put the driver jar file in your web container's libraries folder and restart the container.
for eg: in case of tomcat it may be TOMCATDIR/commons/lib

It's usually a bad idea to add anything to the web container COMMON library directory (mostly to avoid version conflicts).

Use the web application's own library directory instead, unless the common directory is needed to make the web container's connection pooling mechanism pick up the driver (which may well be the case).

thanks jwenting for the info .

allright ! thx

Apparently externally imported jar files in eclipse dont get deployed when using the eclipse deploy options. Stupid eclipse.

That does sound logical. Eclipse likely assumes those jars are not to be deployed else they'd have been made part of the project.

This could for example be j2ee.jar which in a webapp would be provided internally by the application server, or junit which doesn't need to be deployed with the application because the testcases aren't supposed to be run after deployment.