could not locate driver

[Rob Petterson]

I'm trying to run the code example in Beginnig JSP Web Development,
chapter 15,page 463, CreateTable class.
It compiles, but I get the message 'could not locate driver' when trying
to run the prog.
The program file is here:
C:\jakarta-tomcat-4.1.12-LE-jdk14\jakarta-tomcat-4.1.12-LE-jdk14
\webapps\begjsp-ch15\WEB-INF\classes
here's the code:
import java.sql.*;
public class CreateTable {
public static void main(String args[]) {
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
System.out.println("JDBC driver loaded");
con = DriverManager.getConnection("jdbc:mysql://localhost/wrox ?
user=username&password=user_password");
System.out.println("Database connection established");
Statement stmt = con.createStatement();
String upd = "CREATE TABLE Author ("
+ "Author_ID INTEGER NOT NULL PRIMARY KEY, "
+ "Author_Name CHAR(50));";
stmt.executeUpdate(upd);
System.out.println("Table - Author created");
upd = "CREATE TABLE Category "
+ "(Category_ID INTEGER NOT NULL PRIMARY KEY"
+ ",Category_Description CHAR(50));";
stmt.executeUpdate(upd);
System.out.println("Table - Category created");
upd = "CREATE TABLE Contribution ("
+ "Contribution_ID INTEGER NOT NULL PRIMARY KEY,"
+ "Title_ID INTEGER,Author_ID INTEGER);";
stmt.executeUpdate(upd);
System.out.println("Table - Contribution created");
} catch (ClassNotFoundException cnfe) {
System.out.println("ClassNotFoundException: Could not locate
driver");
} catch (SQLException cnfe) {
System.out.println("SQLException: "+cnfe);
} catch (Exception e) {
System.out.println("An unknown error occurred while connecting to
the database");
} finally {
try {
if ( con != null )
con.close();
} catch(SQLException sqle) {
System.out.println("Unable to close database connection.");
}
}
}
}

My class path is:
C:\jakarta-tomcat-4.1.12-LE-jdk14\jakarta-tomcat-4.1.12-LE-jdk14
\common\lib\servlet.jar;C:\jakarta-tomcat-4.1.12-LE-jdk14\jakarta-tomcat-
4.1.12-LE-jdk14\common\lib\mysql-connector-java-2.0.14;

The driver I've downloaded is located here:
C:\jakarta-tomcat-4.1.12-LE-jdk14\jakarta-tomcat-4.1.12-LE-jdk14
\common\lib\mysql-connector-java-2.0.14

Where am I going wrong?
p.s.
I havn't changed the default user name or password in MySQL - does that
make any difference?
Thanks
Rob

[Michael Zalewski]

I just posted the answer to this on another thread. (Well... not quite the same question. But the answer is the same).
Doesn't look like you are registering the driver. Only loading the class. Try

  try {
    Driver mySqlDriver = (Driver) (Class.forName("com.mysql.jdbc.Driver").newInstance());
    System.out.println( "JDBC driver loaded");
    DriverManager.registerDriver( mySqlDriver );
    System.out.println( "JDBC driver registered");
    con = DriverManager.getConnection("jdbc:mysql://localhost/wrox?user=username&password=user_password");
     
    ...
     

[ December 02, 2002: Message edited by: Michael Zalewski ]

[Rob Petterson]

Thanks Michael,
I'll try this out tonight on my home PC and let you know how I get on.