@Override
    public BigDecimal convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
                                        GlobalConfiguration globalConfiguration) {
        return cellData.getNumberValue();
    }
Converts Excel cell data to a BigDecimal object.

@param cellData               The Excel cell data to be converted.
@param contentProperty        The content property associated with the cell.
@param globalConfiguration    The global configuration for the conversion process.
@return                       The converted BigDecimal value from the cell data.
fastexcel-core/src/main/java/cn/idev/excel/converters/bigdecimal/BigDecimalNumberConverter.java