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Posted to users@tomcat.apache.org by Catherine Shepherd <ca...@imperiumglobal.com> on 2002/06/15 19:35:50 UTC
RE: Urgent : Error connecting to mysql Database from JSP pagedeployed on tomcat server
Firstly perhaps this is a question for a Java forum. However, it seems you
are not instantiating your driver properly. This is a connection test class
that works fine connecting from a Tomcat instance on Win2K to a MySQL
instance on a remote Red Hat 7.2 box using the MM.MySQL driver
(http://mmmysql.sourceforge.net/). Try it out on your system. If you are
using a different driver you'll need to change the DBDRIVER String.
package com.imperiumglobal.tools.db;
import java.sql.*;
public class ConnectionTester {
public static void main(String[] args) {
String DBDRIVER = "org.gjt.mm.mysql.Driver";
String DBURL = "jdbc:mysql://[hostname]/[dbname]";
String DBUSER = "[username]";
String DBPASSWORD = "[db password]";
System.out.println("trying connection...");
try {
Class.forName(DBDRIVER).newInstance();
Connection conn =
DriverManager.getConnection(
DBURL + "?user=" + DBUSER + "&password=" + DBPASSWORD);
System.out.println("good connection");
} catch (Exception e) {
System.out.println("no connection: " + e);
}
}
}
James
-----Original Message-----
From: Jayanta Halder [mailto:JHALDER@dfg.ca.gov]
Sent: 14 June 2002 16:35
To: tomcat-user@jakarta.apache.org
Subject: Urgent : Error connecting to mysql Database from JSP
pagedeployed on tomcat server
While running the application i am getting following error ....
Cannot load JDBC driver class 'null'
java.lang.NullPointerException:
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