Connection conn= JDBCUtil.getConnection();
           String sql="insert into accounts values('?','?','?','?','?','?')";
           PreparedStatement pre= conn.prepareStatement(sql);
           pre.setString(1, cardId);
           pre.setString(2, password);
           pre.setBigDecimal(3, new BigDecimal( balance));
           pre.setString(4, email);
           pre.setString(5, visible);
           pre.setDate(6, new java.sql.Date(2012,1,21));
           pre.executeUpdate();