Database connection error with JSP

Question

I'm having problems connecting to a mysql database via a helper object in my jsp pages. I've researched this for the last two days and nothing I have tried is yet to make a difference.
My java code is essentially the following (minus try/catch for readability):
     Connection con = null;
     String dsn = "jdbc:odbc:mwtech";
     String user = "root";
     String password = "";
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     con = DriverManager.getConnection(dsn, user, password);When I run this via JBuilder, it connects to my database without a problem. But when I try to use this same object via a jsp I keep getting the error:
java.sql.SQLException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified .
I'm running Tomcat 4.1 as my web-server, my database is named mwtech and has a User DSN registered in the ODBC panel.
I've made the following alterations to my server.xml and web.xml files:
server.xml
<Context path="" reloadable="true" docBase="ROOT" debug="0" >
     <ResourceParams name="jdbc/mwtech">
         <parameter>
                <name>driverClassName</name>
                <value>sun.jdbc.odbc.JdbcOdbcDriver</value>
         </parameter>
         <parameter>
                <name>url</name>
                <value>jdbc:odbc:mwtech</value>
         </parameter>
         <parameter>
                <name>user</name>
                <value>root</value>
         </parameter>
         <parameter>
                <name>password</name>
                <value></value>
         </parameter>
      </ResourceParams>
</Context>
WEB-INF\web.xml<resource-ref>
<res-ref-name>jdbc/odbc</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
I have also tried configuring this to work with the mysql connector/J driver, but that didn't work either (in fact, it made things worse so it won't even run via JBuilder).
Any help would be greatly appreciated.
--Slowly going insane...                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Answer 1

It's not working because you're failing to provide access to the drivers from the application.
ODBC works in your IDE because your IDE is pathed for both J2EE and J2SE.
ODBC does not work in the Servlet container because it is not core there.
Connector/J doesn't work in either because Connector/J is not part of either core J2SE or J2EE. So....
Once again download the Conenctor/J driver (this is the better way to go, trust me on this). Put the mysql-connector-java-xxxx.jar file in the <%WEB_ROOT%>/WEB-INF/lib directory of your application. (replace <%WEB_ROOT%> with your root context). This should now work, both in your IDE and your web-app.