@Override
    public LocalDate convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
                                       GlobalConfiguration globalConfiguration) {
        if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null) {
            return DateUtils.getLocalDate(cellData.getNumberValue().doubleValue(),
                globalConfiguration.getUse1904windowing());
        } else {
            return DateUtils.getLocalDate(cellData.getNumberValue().doubleValue(),
                contentProperty.getDateTimeFormatProperty().getUse1904windowing());
        }
    }
LocalDate and number converter

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