我制作了一个机器人，该机器人使用POI从Excel文件发送信息。这是我的第一个帖子，欢迎任何批评家或建议。 代码正在读取Excel文件（该机器人的目的是销售智能手机）并获取标题和价格，然后获取URL并将其发送给用户。但是，当我同时使用两个帐户的bot时，bot首先将照片发送给第一个用户，然后再发送给另一个用户。如何使它同时适用于所有用户？

class Methods extends Bot {

    private static String caption( Sheet sheet,int i ) {
        return sheet.getRow( i ).getcell( 4 ).toString( ) + " "
                + sheet.getRow( i ).getcell( 6 ).toString( ) + "\n "
                + sheet.getRow( i ).getcell( 7 ).toString( ) + " "
                + sheet.getRow( i ).getcell( 8 ).toString( ) + " ";
    }


    private static String photo( Sheet sheet,int i ) {
        return sheet.getRow( i ).getcell( 9 ) + " ";
    }

    public void senderOfGoods( String call_data,String excelProductTypeSorter,Long chat_id ) {
        final String SAMPLE_XLSX_FILE_PATH = "C:/Users/user/Desktop/File.xlsx";
        Workbook workbook = null;
        try {
            workbook = WorkbookFactory.create( new File( SAMPLE_XLSX_FILE_PATH ) );
        } catch (IOException | InvalidFormatException e) {
            e.printStackTrace( );
        }

        assert workbook != null;
        for (Sheet sheet : workbook) {

            sheet = workbook.getSheetat( 0 );

            int counterTillFive = 0;

            for (int i =0; i <= sheet.getLastRowNum( ); i++) {
                String razdel_1 = String.valueOf( sheet.getRow( i ).getcell( 2 ) );
                String caption = Methods.caption( sheet,i );
                String photo = Methods.photo( sheet,i );
                //Searching String from excel 

                //Here excelProductTypeSorter searches for string in excel if finds then send that row text as a caption      

                if ( razdel_1.contains( excelProductTypeSorter ) ) {
                    SendPhoto sendPhoto = new SendPhoto( )
                            .setChatId( chat_id )
                            .setCaption( caption )
                            .setPhoto( photo );

                    try {
                        sendPhoto( sendPhoto );
                    } catch (TelegramApiException e) {
                        e.printStackTrace( );
                    }

                    if ( counterTillFive % 5 == 0 && counterTillFive != 0 )
                        break;
                    counterTillFive++;
                }
            }

            try {
                workbook.close( );
            } catch (IOException e) {
                e.printStackTrace( );
            }
        }
    }
}