import java.sql.*;
...

private Connection con;

public void init(ServletConfig config) throws ServletException
{
  String driver = config.getInitParameter("database-driver-class");
  String jdbcurl = config.getInitParameter("database-url");
  String login = config.getInitParameter("database-login");
  String password = config.getInitParameter("database-password");
  try
  {
    Class.forName(driver); // Charge le pilote
    con = DriverManager.getConnection(jdbcurl,
      login, password);
  }
  catch (Exception e)
  {
    throw new UnavailableException(e.getMessage());
  }
}
