Connection mysql jdbc error ?

Question

I have program java likes this :
import java.sql.*;
public class LoadDriver {
    // Define the JDBC Driver and the database connection URL
    public static final String DRIVER = "com.mysql.jdbc.Driver";
    public static final String URL = "jdbc:mysql://localhost/java?user=test&password=test";
    public static void main(String args[]) {
        Connection conn = null;
Statement select = null;
ResultSet result = null;
        try {
            // load the driver dynamically
            Class.forName(DRIVER);
            // connect to the database
            conn = DriverManager.getConnection(URL);
            // perform a query. first create a Statement object from the connection
            select = conn.createStatement();
// next execute a query (SQL string) and return the results in a ResultSet object
            result = select.executeQuery("select fname, lname from names order by lname, fname");
            // print out the results
            while(result.next()) {
                String fname = result.getString("fname"); // note these match the columns in the
                String lname = result.getString("lname"); // SELECT statement (fname, lname)
                System.out.println(fname+" "+lname);
// check if there was a problem executing the SQL statement
        catch (SQLException e) {
            System.err.println("SQL Exception: "+e.getMessage());
            System.exit(1);
// if the JDBC driver is not in the CLASSPATH
        catch (ClassNotFoundException e) {
            System.err.println("Class not found:  "+e.getMessage());
            System.exit(1);
// catch any other exceptions
        catch (Exception e) {
            System.err.println("Other Exception: ");
            System.err.println(e.getMessage());
            System.exit(1);
// You want to close the connections no matter what happens!
finally {
try {
// close the result, query, and database connection
if (result != null) result.close();
             if (select != null) select.close();
            if (conn != null) conn.close();
catch (SQLException e) {
// one of the new cases where it's OK to just eat exceptions or at the most log them
System.err.println("Error closing connection: "+e.getMessage());
  but i get errror likes this :
D:\Program Files\Java\jdk1.5.0_03\bin>javac LoadDriver.java
D:\Program Files\Java\jdk1.5.0_03\bin>java LoadDriver
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Sign
ature
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at LoadDriver.main(LoadDriver.java:20)
D:\Program Files\Java\jdk1.5.0_03\bin>
I place mysql.jar in
- D:\Program Files\Java\jdk1.5.0_03\jre\lib\ext
- D:\Program Files\Java\jdk1.5.0_03\lib
- D:\Program Files\Java\jdk1.5.0_03\jre\lib
and i make classpath to D:\Program Files\Java\jdk1.5.0_03\bin;D:\Program Files\Java\jdk1.5.0_03\jre\lib\ext\
but it still doesn't work
What must I do ?
Thx 4 your reply

Answer 1

Hello!
I'm getting this same error message and i followed the code example as close as i could:
Thanks for any help on this!
bk
set oldpath=%PATH%
set JAVA_HOME=C:\jdk1.5.0_02
set ANT_HOME=C:\ANT\apache-ant-1.6.5
set PATH=C:\jdk1.5.0_02\bin;%ANT_HOME%\bin
set CLASSPATH=.;C:\jdk1.5.0_02\lib;C:\MYSQL\mysql-connector-java-3.1.10\src\com\;C:\MYSQL\mysql-connector-java-3.1.10\src\org\;C:\MYSQL\mysql-connector-java-3.1.10\mysql-connector-java-3.1.10-bin-g.jar;
http://www.developer.com/java/data/article.php/3417381#Critical_steps_in_using_JDBC
import java.sql.*;
public class Jdbc11 {
  public static void main(String args[]){
    System.out.println(
                  "Copyright 2004, R.G.Baldwin");
    try {
      Statement stmt;
      //Register the JDBC driver for MySQL.
      Class.forName("com.mysql.jdbc.Driver");
      //Define URL of database server for
      // database named mysql on the localhost
      // with the default port number 3306.
      String url =
            "jdbc:mysql://localhost:3306/mysql";
      //Get a connection to the database for a
      // user named root with a blank password.
      // This user is the default administrator
      // having full privileges to do anything.
      Connection con =
                     DriverManager.getConnection(
                                 url,"root", "");
      //Display URL and connection information
      System.out.println("URL: " + url);
      System.out.println("Connection: " + con);
      //Get a Statement object
      stmt = con.createStatement();
      //Create the new database
      stmt.executeUpdate(
                       "CREATE DATABASE JunkDB");
      //Register a new user named auser on the
      // database named JunkDB with a password
      // drowssap enabling several different
      // privileges.
      stmt.executeUpdate(
          "GRANT SELECT,INSERT,UPDATE,DELETE," +
          "CREATE,DROP " +
          "ON JunkDB.* TO 'auser'@'localhost' " +
          "IDENTIFIED BY 'drowssap';");
      con.close();
    }catch( Exception e ) {
      e.printStackTrace();
    }//end catch
  }//end main
}//end class Jdbc11
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Signature