Hi where ist your Database Connection? In the server.xml in the context for your test application.
The jdbc.driver must be placed into the directory common/lib. I hope this will help. Regards Gerlinde > -----Ursprungliche Nachricht----- > Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Gesendet: Dienstag, 11. Marz 2003 22:58 > An: [EMAIL PROTECTED] > Betreff: java.sql.SQLException: Cannot load JDBC driver class 'null' > > > Tomcat version - 4.1.12 > MySQL version - 3.23.55-nt > OS - WinNT > JDK - 1.4.1_01 > > I have researched this problem on the internet and in the > documentation for > Tomcat, and I still haven't resolved this issue. So, I'm looking > for help from > someone from this list. > > Here is my URL that I invoke: http://localhost:8080/dbtest/test.jsp > Here is the error I receive: > > java.sql.SQLException: Cannot load JDBC driver class 'null' at > org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSou > rce.java:529) > > Referencing this URL - > http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-ex > amples-howto.html: > 1. I have a database and table with 1 row of data > 2. Here is the chunk of code that I inserted into my > $CATALINA_HOME/conf/server.xml. > <!-- Database configuration for MySQL --> > <Context path="/DBTest" docBase="DBTest" > debug="5" reloadable="true" crossContext="true"> > > <Logger className="org.apache.catalina.logger.FileLogger" > prefix="localhost_DBTest_log." suffix=".txt" > timestamp="true"/> > > <Resource name="jdbc/TestDB" > auth="Container" > type="javax.sql.DataSource"/> > > <ResourceParams name="jdbc/TestDB"> > <parameter> > <name>factory</name> > > <value>org.apache.commons.dbcp.BasicDataSourceFactory</value> > </parameter> > > <!-- Maximum number of dB connections in pool. > Make sure you > configure your mysqld max_connections large enough to > handle > all of your db connections. Set to 0 for no limit. > --> > <parameter> > <name>maxActive</name> > <value>100</value> > </parameter> > > <!-- Maximum number of idle dB connections to > retain in pool. > Set to 0 for no limit. > --> > <parameter> > <name>maxIdle</name> > <value>30</value> > </parameter> > > <!-- Maximum time to wait for a dB connection to > become available > in ms, in this example 10 seconds. An > Exception is thrown > if > this timeout is exceeded. Set to -1 to wait > indefinitely. > --> > <parameter> > <name>maxWait</name> > <value>10000</value> > </parameter> > > <!-- MySQL dB username and password for dB connections --> > <parameter> > <name>username</name> > <value>bugtracker</value> > </parameter> > <parameter> > <name>password</name> > <value>footin</value> > </parameter> > > <!-- Class name for mm.mysql JDBC driver --> > <parameter> > <name>driverClassName</name> > <value>org.gjt.mm.mysql.Driver</value> > </parameter> > > <!-- The JDBC connection url for connecting to > your MySQL dB. > The autoReconnect=true argument to the url > makes sure that > the > mm.mysql JDBC Driver will automatically > reconnect if mysqld > closed the > connection. mysqld by default closes idle > connections > after 8 hours. > --> > <parameter> > <name>url</name> > <!-- > <value>jdbc:mysql://localhost:3306/javatest?autoReconnect=true</value>--> > <value>jdbc:mysql://localhost:3306/bugtracker</value> > </parameter> > </ResourceParams> > </Context> > 3. Here is my web.xml under $CATALINA_HOME/webapps/dbtest/web-inf/web.xml: > <?xml version="1.0" encoding="ISO-8859-1"?> > <!DOCTYPE web-app PUBLIC > "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" > "http://java.sun.com/dtd/web-app_2_3.dtd";> > <web-app> > <description>MySQL Test App</description> > <resource-ref> > <description>DB Connection</description> > <res-ref-name>jdbc/TestDB</res-ref-name> > <res-type>javax.sql.DataSource</res-type> > <res-auth>Container</res-auth> > </resource-ref> > </web-app> > > 4. Added my DB Driver under > $CATALINA_HOME/webapps/dbtest/lib/org/git/mm/mysql/Driver.class. > I also tried > just putting the jar file under the /lib. > > 5. Created a JSP and class just like in the example above. I just > changed my > select statement inside the class, that's all. > > 6. I have verified that my database is indeed running. > > 7. In my.ini (for MySQL), the port setting is NOT commented. The > bind-address IS > commented out. > > Thanks for any help! > Kevin > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
