MySQL/Java connection

Question

I'm experiencing some problems during a connection java/mysql in a debian linux. I've got the message
SQL Exception: Unable to connect to any hosts due to exception: java.net.ConnectException: Connection refused
I am using the connector 3.0.8.
When I enter the shell, everything works fine.
Here is the code I've used:
import java.sql.*;
public class DBTest {
public static void main(String[] args) {
try {
Class.forName ("com.mysql.jdbc.Driver");
System.out.println("Driver JDBC loaded!");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql");
} catch (SQLException sqle) {
System.err.println("SQL Exception: " + sqle.getMessage());
} catch (Exception e) {
System.err.println("Exception: " + e.getMessage());
Thanks!
Gilmar

Answer 1

I suspect the problem is the lack of user and pasword. An example of a similar connection I make follows.
public static Connection openSQLConnection(String connectionDriver, String connectionString) {
  errMsg = "Unable to open SQL connection.";
  // Connection reference
  Connection sqlconn = null;
  try {
    // Load database driver
    Class.forName("com.mysql.jdbc.Driver");
    // Make connection
    sqlconn = DriverManager.getConnection("jdbc:mysql://localhost/passport?user=root&password=");
    catch (ClassNotFoundException cnfex) {showSystemError(errMsg,"openSQLConnection - Class not found exception", cnfex, true);}
    catch (SQLException sqlex) {showSystemError(errMsg,"openSQLConnection - SQL exception", sqlex, true);}
    catch (Exception excp) {showSystemError(errMsg,"openSQLConnection - Remaining exceptions", excp, true);}
    return sqlconn;
}Note To avoid confusion - my error handler showSystemError will shut down the system idf the connection fails.
rykk