try {     
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ZipOutputStream zos = new ZipOutputStream(baos);
        String sql = "select * from "+cfg_owner+"."+cfg_object;
        try (Statement stmt = connection.createStatement()) {
            ResultSet rs = stmt.executeQuery(sql);
            ResultSetMetaData rsmd = rs.getMetaData();
            int ColumnCount = rsmd.getColumnCount();

            zos.putNextEntry(new ZipEntry(cfg_output_dir+"\\"+cfg_output_file+".zip"));
            while (rs.next()) {
                for (int i = 1; i<=ColumnCount; i++)
                {
                    zos.write(rs.getString(i).getBytes());
                }
            zos.flush();
            zos.closeEntry();
            }            
        }