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can't load java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver

2 replies on 1 page. Most recent reply: Sep 25, 2006 12:44 AM by Matthias Neumair

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Horacio Tovar

Posts: 1
Nickname: hetch
Registered: Sep, 2006

can't load java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver

Posted: Sep 22, 2006 4:58 PM

PLEASE HELLP!!!!
Hi guys, I am almost crazy with this problem. THANK YOU!

I am doing a little and simple program to connect from Microsoft Visual j# .NET java program to an Access database. I am getting this error:

java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver
at com.ms.vjsharp.lang.VJSClassLoader.loadClass(String name, Boolean resolve)
at com.ms.vjsharp.lang.VJSClassLoader.__getClassFromClassLoader(VJSClassLoader ld, String className)
at com.ms.vjsharp.lang.VJSClassLoader.loadClass(String name)
at java.lang.Class.forName(String className, Assembly callerA)
at java.lang.Class.forName(String className)
at ConnectProject.Connect.getConnection() in F:\Vigo\ConnectProject\ConnectProject\Connect.jsl:line 30
Error Trace in getConnection() : sun.jdbc.odbc.JdbcOdbcDriver

I have tried different forums and read a lot on internet, I set my CLASSPATH in this way:

CLASSPATH=C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\msbase.jar;C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\msutil.jar;c:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\mssqlserver.jar;c:\j2sdk1.4.2_12\bin\rt.jar

I checked the files msbase.jar, msutil.jar and mssqlserver.jar exist in the directory. Also, the rt.jar is in c:\j2sdk1.4.2_12\bin\rt.jar.

Please somebody help me, I am being stuck here for 2 weeks.

Here is the code I am using:

package ConnectProject;

import java.*;
public class Connect
{
private java.sql.Connection con = null;
private final String url = "jdbc:microsoft:sqlserver://";
private final String serverName= "localhost";
private final String portNumber = "1433";
private final String databaseName= "pubs";
private final String userName = "user";
private final String password = "password";
// Informs the driver to use server a side-cursor,
// which permits more than one active statement
// on a connection.
private final String selectMethod = "cursor";

// Constructor
public Connect(){}

private String getConnectionUrl()
{
return
url+serverName+":"+portNumber+";databaseName="+data baseName+";selectMethod="+selectMethod+";";
}

private java.sql.Connection getConnection()
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = java.sql.DriverManager.getConnection
(getConnectionUrl(),userName,password);
if (con!=null) System.out.println("Connection
Successful!");
}
catch(Exception e)
{
e.printStackTrace();
System.out.println("Error Trace in getConnection() : " +
e.getMessage());
}
return con;
}

/*
Display the driver properties, database details
*/

public void displayDbProperties()
{
java.sql.DatabaseMetaData dm = null;
java.sql.ResultSet rs = null;
try
{
con= this.getConnection();
if(con!=null)
{
dm = con.getMetaData();
System.out.println("Driver Information");
System.out.println("\tDriver Name: "+
dm.getDriverName());
System.out.println("\tDriver Version: "+
dm.getDriverVersion ());
System.out.println("\nDatabase Information ");
System.out.println("\tDatabase Name: "+
dm.getDatabaseProductName());
System.out.println("\tDatabase Version: "+
dm.getDatabaseProductVersion());
System.out.println("Avalilable Catalogs ");
rs = dm.getCatalogs();
while(rs.next())
{
System.out.println("\tcatalog: "+ rs.getString(1));
}
rs.close();
rs = null;
closeConnection();
}
else System.out.println("Error: No active Connection");
}
catch(Exception e)
{
e.printStackTrace();
}
dm=null;
}
private void closeConnection()
{
try
{
if(con!=null)
con.close();
con=null;
}
catch(Exceptio n e)
{
e.printStackTrace();
}
}
public static void main(String[] args) throws Exception
{
Connect myDbTest = new Connect();
myDbTest.displayDbProperties();
}
}

Matthias Neumair

Posts: 660
Nickname: neumi
Registered: Sep, 2003

Re: can't load java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriv

Posted: Sep 25, 2006 12:42 AM

It looks like a classical classpath problem.
Your code looks good, I'm sure you can execute it from the compiler, right?
Try to print out your classpath variable during runtime (System.Properties ...)

Since I always set the classpath at program start I can't tell you if you have to put a '"' symbol at the start and the end of the classpath variable or to bring all entries to the 8.3 format.

Matthias Neumair

Posts: 660
Nickname: neumi
Registered: Sep, 2003

Re: can't load java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriv

Posted: Sep 25, 2006 12:44 AM

one more thing. When posting code here, please use the java tags as shown on the right side in the "formatting your post" section.
But: do NOT copy your old unformatted code into it but copy the code directly from your compiler.

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