Can't load jdbc driver from localhost

I'm having problems loading the jdbc driver from localhost when using a java com object in ASP.
The simple class compiles fine and runs perfect from dos command line but gives this exception when run from personal webserver:
java.lang.ClassNotFoundException: sun/jdbc/odbc/JdbcOdbcDriver
Obviously, it is not finding the jdbc driver, but what is the problem? It finds the driver when run from dos locally. Do I need a 3rd party driver when using as a COM object?
Here is a code snippet:
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection TestConnection = DriverManager.getConnection("jdbc:odbc:systemDSN", "username", "password");
Any help is appreciated, thanks!

I don't think it's exactly a classpath problem. I think when you run from the DOS command line, you are using the java.exe program that contains Sun's JVM and all the associated classes including sun/jdbc/odbc/JdbcOdbcDriver. But when you use this Java COM object (which I am not familiar with), if it doesn't find that class then it must be using the Microsoft VM, which naturally doesn't include that class you are having a problem with.

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Dear All,
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Any Suggestion?
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Hi Kitty,
The connection you're trying to set up points to nothing :
Connection conn = null;
So, you receive a complaint that that driver cannot be loaded. Please read
http://java.sun.com/docs/books/tutorial/jdbc/basics/connecting.html
download the right database driver and use that. Good luck!
Wouter van Reeven
public User authenticate(String username, String
g password)
throws AuthenticationException, UnknownException
ption {
Connection conn = null;
PreparedStatement pstmt = null;
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<br>
<br>
Scriptlet :
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final String PREQESERVERNAME = "jdbc:microsoft:sqlserver://localhost:1433";
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final String DATABASE_DLL = "crdb_jdbc.dll";
final String DATABASE = "bssc";
final String DBCLASSNAME = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
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<%
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final String DBPASSWORD = "password";
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final String TRUSTEDCON = "false";
final String PREQESERVERNAME = "jdbc:microsoft:sqlserver://localhost:1433";
final String SERVERTYPE = "JDBC (JNDI)";
final String DATABASE_DLL = "crdb_jdbc.dll";
final String DATABASE = "bssc";
final String DBCLASSNAME = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
final String USEJDBC = "true";
final String DATABASE_NAME = "bssc";
final String SERVERNAME = "jdbc:microsoft:sqlserver://localhost:1433";
final String CONNECTIONURL = "jdbc:microsoft:sqlserver://localhost:1433";
final String SERVER = "localhost";
%>
<%
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%>
I am not sure why it is not able to get the Driver since the required jar is there in lib folder? Am I missing something ?
Edited by: sb-onward on Jul 30, 2009 6:01 PM

Hi,
Make sure you have set the Classpath in CRConfig.xml for the jdbc jar.
Place the CrConfig.xml in the classes directory of your application.
Please let me know the results.
Regards,
Neeraj

Urgent... unable to load JDBC driver

i have developed a servlet which will establish connection to mySQL.. but it couldn't load the JDBC driver even i placed
[ mysql-connector-java-2.0.14-bin.zip ] in [ C:\j2sdk1.4.2_05\jre\lib\ext\ ]
in fact.. it work fine b4 i format my notebook.. anyone can help me??
pls note that i using APACHE TOMCAT and mySQL 3.23
pls help.. very urgent one
the following is my servlet code.....
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
public class LoginServlet extends HttpServlet {
static final String dbURL = "jdbc:mysql://localhost" ;
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Connection conn = null;
String nextJSP = null;
try {
Class.forName("org.gjt.mm.mysql.Driver");
catch (ClassNotFoundException e) {
throw new ServletException("Unable to load JDBC driver");
}

i already add new variable in environment variables
variable name = CLASSPATH
variable value = C:\j2sdk1.4.2_05\jre\lib\ext\mysql-connector-java-2.0.14-bin.jar;
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Beginner Has Problem With Loading JDBC Driver Using MySQL

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Hi,
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[http://dev-loki.blogspot.com/2008/01/loading-jdbc-driver-at-runtime.html]
[http://www.kfu.com/~nsayer/Java/dyn-jdbc.html]
[http://www.devdaily.com/java/edu/JDBC-SQLProcessor/Simple_JDBC_Example.shtml]
[http://tech.puredanger.com/2006/11/09/classloader/]
[http://fdt.powerflasher.com/blog/?p=35]
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          } catch (ClassNotFoundException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (SQLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (InstantiationException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (IllegalAccessException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } Project Folder Structure
DB
bin
lib
connectors
mysql-connector-java-5.1.7-bin.jar
src
result of classpath
.;C:/Users/Luis/Documents/eclipse/workspace/DBDIGGER/lib/connectors;native;C:\Program Files\Java\jre6\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre6/bin/client;C:/Program Files/Java/jre6/bin;C:\Program Files\JavaFX\javafx-sdk1.1\bin;C:\Program Files\JavaFX\javafx-sdk1.1\emulator\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\Intel\DMIX;C:\Program Files\Softex\OmniPass;C:\Program Files\MySQL\MySQL Server 5.1\bin
Maybe what i'm doing wrong is the classpath, this is not a web app is a standard java aplication...
Could someone explain to me how to set a classpath ?? correctly...

ZipException in Loading JDBC Driver

Getting java.util.zip.ZipException trying to Load JDBC Driver Class.
The JDBC driver classes are in a jar file which is in WEBLOGIC_CLASSPATH.The
jar file is perfectly valid, atleast I can see it with "jar".
It works fine If I extract the jar file into my serverclasses which is in
WEBLOGIC_CLASSPATH.
We are running WLS51SP10 on AIX4.3.3. Classic VM (J2RE 1.2.2 IBM build
ca122-20010313 (JIT enabled: jitc))
I appreciate any help on this.
Thanks,
Pavan
This is the first few lines from the exception stacktrace.
java.util.zip.ZipException: invalid LOC header (bad signature)
at java.util.zip.ZipFile.read(Native Method)
at java.util.zip.ZipFile.access$5(ZipFile.java(Compiled Code))
at
java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java(Compiled Code))
at java.util.zip.ZipFile$1.fill(ZipFile.java(Compiled Code))
at
java.util.zip.InflaterInputStream.read(InflaterInputStream.java(Compiled
Code))
at weblogic.boot.ZipSource.getBytes(ZipSource.java(Compiled Code))
at
weblogic.boot.ServerClassLoader.findLocalClass(ServerClassLoader.java(Compil
ed Code))
at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))
at java.lang.Class.forName1(Native Method)
at java.lang.Class.forName(Class.java(Compiled Code))
at common.cimsdao.DaoConnection.getConnection(DaoConnection.java:66)

Hi.
You might try getting another copy of the driver. It could be corrupted in some
way but still work with the jar utility.
Regards,
Michael
Pavan Dinavahi wrote:
Getting java.util.zip.ZipException trying to Load JDBC Driver Class.
The JDBC driver classes are in a jar file which is in WEBLOGIC_CLASSPATH.The
jar file is perfectly valid, atleast I can see it with "jar".
It works fine If I extract the jar file into my serverclasses which is in
WEBLOGIC_CLASSPATH.
We are running WLS51SP10 on AIX4.3.3. Classic VM (J2RE 1.2.2 IBM build
ca122-20010313 (JIT enabled: jitc))
I appreciate any help on this.
Thanks,
Pavan
This is the first few lines from the exception stacktrace.
java.util.zip.ZipException: invalid LOC header (bad signature)
at java.util.zip.ZipFile.read(Native Method)
at java.util.zip.ZipFile.access$5(ZipFile.java(Compiled Code))
at
java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java(Compiled Code))
at java.util.zip.ZipFile$1.fill(ZipFile.java(Compiled Code))
at
java.util.zip.InflaterInputStream.read(InflaterInputStream.java(Compiled
Code))
at weblogic.boot.ZipSource.getBytes(ZipSource.java(Compiled Code))
at
weblogic.boot.ServerClassLoader.findLocalClass(ServerClassLoader.java(Compil
ed Code))
at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))
at java.lang.Class.forName1(Native Method)
at java.lang.Class.forName(Class.java(Compiled Code))
at common.cimsdao.DaoConnection.getConnection(DaoConnection.java:66)--
Michael Young
Developer Relations Engineer
BEA Support

Cannot load JDBC Driver Class in Tomcat5.5 using struts.

Hello to all,
I'm working in the struts environment using Esclipse3.2 IDE.
And I have installed Tomcat5.5 server.I have created the LoginForm
in struts.Now i like to connect my LoginForm with MySql database.I
have also created the database in MySql naming strutsdatabase.
I had also download the mysql-connector-java-3.0.16-ga-bin.jar and
save that in C:/tomcat/commons/lib directory.
While running I have got the below error:
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'com.mysql.jdbc.Driver'
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:766)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.setLogWriter(BasicDataSource.java:598)
at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionServlet.java:808)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:335)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105)
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
javax.servlet.UnavailableException: Initializing application data source org.apache.struts.action.DATA_SOURCE
at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionServlet.java:812)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:335)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:932)
And I have attached my struts-config.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software
Foundation//DTD Struts Configuration 1.2//EN"
"http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<data-sources>
<data-source
type="org.apache.tomcat.dbcp.dbcp.BasicDataSource">
<set-property property="url"
value="jdbc:mysql://localhost:3306/strutsdatabase?autoReconnect
=true"/>
<set-property property="driverClassName"
value="com.mysql.jdbc.Driver"/>
<set-property property="username" value=""/>
<set-property property="password" value=""/>
<set-property property="maxActive" value="10"/>
<set-property property="validationQuery" value="SELECT
COUNT(*) FROM test"/>
<set-property property="maxWait" value="5000"/>
<set-property property="defaultAutoCommit" value="false"/>
</data-source>
</data-sources>
<form-beans>
<form-bean name="LoginForm"
type="fino.web.struts.action.LoginForm"/>
</form-beans>
<global-exceptions/>
<global-forwards/>
<action-mappings>
<action name="LoginForm" path="/login" scope="request"
type="fino.web.struts.action.LoginAction" validate="true">
<forward name="success" path="/success.jsp"/>
<forward name="failure" path="/failure.jsp"/>
</action>
</action-mappings>
<controller/>
<message-resources null="false"
parameter="org.apache.struts.action.ActionResources"/>
</struts-config>
Friends,please help me to find solution to this problem.

Note: This thread was originally posted in the [Java Compiler|http://forums.sun.com/forum.jspa?forumID=7] forum, but moved to this forum for closer topic alignment.

Failed to load JDBC driver

I am trying to run a program and keep getting the error Failed to load JDBC driver. java.lang.ClassNotFoundException
How can I correct this?

I was just trying to execute this example from Deitel's Java book.
import java.awt.*;
import java.sql.*;
import java.util.*;
import javax.swing.*;
public class DisplayAuthors extends JFrame {
   // JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.ibm.db2j.jdbc.DB2jDriver";
   static final String DATABASE_URL = "jdbc:db2j:books";
   // declare Connection and Statement for accessing
   // and querying database
   private Connection connection;
   private Statement statement;
   // constructor connects to database, queries database, processes
   // results and displays results in window
   public DisplayAuthors()
      super( "Authors Table of Books Database" );
      // connect to database books and query database
      try {
         // specify location of database on filesystem
         System.setProperty( "db2j.system.home", "C:/Cloudscape_5.0" );
         // load database driver class
         Class.forName( JDBC_DRIVER );
         // establish connection to database
         connection = DriverManager.getConnection( DATABASE_URL );
         // create Statement for querying database
         statement = connection.createStatement();
         // query database
         ResultSet resultSet =
            statement.executeQuery( "SELECT * FROM authors" );
         // process query results
         StringBuffer results = new StringBuffer();
         ResultSetMetaData metaData = resultSet.getMetaData();
         int numberOfColumns = metaData.getColumnCount();
         for ( int i = 1; i <= numberOfColumns; i++ )
            results.append( metaData.getColumnName( i ) + "\t" );
         results.append( "\n" );
         while ( resultSet.next() ) {
            for ( int i = 1; i <= numberOfColumns; i++ )
               results.append( resultSet.getObject( i ) + "\t" );
            results.append( "\n" );
         // set up GUI and display window
         JTextArea textArea = new JTextArea( results.toString() );
         Container container = getContentPane();
         container.add( new JScrollPane( textArea ) );
         setSize( 300, 100 ); // set window size
         setVisible( true );   // display window
      } // end try
      // detect problems interacting with the database
      catch ( SQLException sqlException ) {
         JOptionPane.showMessageDialog( null, sqlException.getMessage(),
            "Database Error", JOptionPane.ERROR_MESSAGE );
         System.exit( 1 );
      // detect problems loading database driver
      catch ( ClassNotFoundException classNotFound ) {
         JOptionPane.showMessageDialog( null, classNotFound.getMessage(),
            "Driver Not Found", JOptionPane.ERROR_MESSAGE );
         System.exit( 1 );
      // ensure statement and connection are closed properly
      finally {
         try {
            statement.close();
            connection.close();
         // handle exceptions closing statement and connection
         catch ( SQLException sqlException ) {
            JOptionPane.showMessageDialog( null,
               sqlException.getMessage(), "Database Error",
               JOptionPane.ERROR_MESSAGE );
            System.exit( 1 );
   } // end DisplayAuthors constructor
   // launch the application
   public static void main( String args[] )
      DisplayAuthors window = new DisplayAuthors();
      window.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
} // end class DisplayAuthors

Problem loading jdbc driver in Tomcat

Hi,
I have got a connection to MySQL5.0 from TomCat 5.5.13, that was test correctly in development (JSC Upd 1) but I encounter the following deployment error :
com.sun.rave.web.ui.appbase.ApplicationException: org.apache.jasper.JasperException: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'com.mysql.jdbc.Driver'
When I verify, I found that if I put the mysql Connector JDBC driver in <tomcat>/common/lib, there is no error.
But when the MySql Connector JDBC driver resides in <tomcat>/shared/lib, the error persists.
What's the difference ? shouldn't it work for both ?
Thanks in advance for any pointers and advise.

hmm... i guess that it's a must to include the lib at /common/lib instead of shared/lib .
Is there a Tomcat resource that I can read up on ?
rgds

Can't load jdbc driver from localhost

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