Java CP1252至UTF8

Question

I have a spreadsheet (.xls) with car plate numbers in encoding windows-1252, BUT originally those numbers were inputted in cyrillic in encoding UTF-8. What I mean: ie У992НВ in cyrillic is the same Y992HB in latin (there is a difference between first letters) So, I take those numbers and convert it

 if (cell.getCellType() == CellType.STRING) {
                    String cellValue = cell.getStringCellValue();
                    try {
                        byte[] b = cellValue.getBytes("windows-1252");
                        String cellValue2 = new String(b, StandardCharsets.UTF_8);
                        cell.setCellValue(cellValue2);
                    }
                    catch ( UnsupportedEncodingException ex) {

                    }

But, output is wrong. Input data in windows-1252 is " Т313ÐК777 " and output is Т313 К777, because middle sign is unreadable. What am I doing wrong?

Answer 1

1. Java's byte is not a byte. So byte by byte decoding didn't work.
2. I parsed symbols dex values and tried to decode them by matching values with UTF8. Some values were equivalent only to UTF-8 latin-1. I found package for python to decode broken UTF-8. It works. BUT: It doesn't work with jython 2.7, because maintainer gave up supporting Python 2.7

Thanks for your help.