Could not find Microsoft JDBC Driver ???

Question

Hi all,
My program could not find the JDBC driver. Why?????
Here is my environment:
Platform: Win2000
Database: Sql2000
Tool: JBuilder enterprise (trial version)
JDBC Driver: Microsoft JDBC driver for SQL Server 2000
I set the CLASSPATH=.;D:\Sql200JDBCDriver\lib\msbase.jar;D:\Sql200JDBCDriver\lib\msutil.jar;D:\Sql200JDBCDriver\lib\mssqlserver.jar
Here is my javabean:
package test;
import java.sql.*;
import java.io.*;
public class LoginBean{
public static boolean login(String strUser, String strPass)     {
ResultSet rs;
try{
System.out.println("before class.forName");//Print trapped error.
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
System.out.println("After class.forName");//Print trapped error.
java.sql.Connection theConnection = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:8080;DataBaseName ='MyDataBase;User=sa;passowrd="); //Connect to db
System.out.println("After get connection");//Print trapped error.
Statement theStatement=theConnection.createStatement();
rs=theStatement.executeQuery("SELECT username, password FROM login WHERE username= '" + strUser + "' AND password= '" + strPass + "'");
if(rs.next()) //Fetch username of record
return true;
}catch(Exception e){
System.out.println("before e.getMessage error");//Print trapped error.
System.out.println(e.getMessage());//Print trapped error.
System.out.println("after e.getMessage error");//Print trapped error.
} return false;
Here are the messages I got:
before class.forName
before e.getMessage error
com.microsoft.jdbc.sqlserver.SQLServerDriver
after e.getMessage error.
The program never got throught the statement: Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
What's wrong?????
thanks in advanced.

Answer 1

I guess you have a good idea what the problem is. Either the class name you have specified is wrong or the required library is not on the classpath.
How are you setting the classpath? Are you running your application through JBuilder or through the command line?
If it's through JBuilder then make sure that you've configured one of their tiresome "Libraries" and that your project has it in its "Required Libraries".
Never rely on environment variables to supply the classpath - it takes very little effort to set up a classpath for each application you're developing and will ensure you're using the versions of each library that you want to. Personally I make sure I delete the classpath environment variable so there's nothing implicit hiding away.
Hope this helps.