@Override
    public WriteCellData<?> convertToExcelData(Byte[] value, ExcelContentProperty contentProperty,
                                               GlobalConfiguration globalConfiguration) {
        byte[] byteValue = new byte[value.length];
        for (int i = 0; i < value.length; i++) {
            byteValue[i] = value[i];
        }
        return new WriteCellData<>(byteValue);
    }
Boxing Byte array and image converter

@author Jiaju Zhuang
fastexcel-core/src/main/java/cn/idev/excel/converters/bytearray/BoxingByteArrayImageConverter.java