@Override
    public WriteCellData<?> convertToExcelData(String value, ExcelContentProperty contentProperty,
                                               GlobalConfiguration globalConfiguration) {
        return new WriteCellData<>(Boolean.valueOf(value));
    }
String and boolean converter

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