public static ExcelContentProperty declaredExcelContentProperty(Map<?, ?> dataMap, Class<?> headClazz,
        String fieldName,
        ConfigurationHolder configurationHolder) {
        Class<?> clazz = null;
        if (dataMap instanceof BeanMap) {
            Object bean = ((BeanMap)dataMap).getBean();
            if (bean != null) {
                clazz = bean.getClass();
            }
        }
        return getExcelContentProperty(clazz, headClazz, fieldName, configurationHolder);
    }
Calculate the configuration information for the class

@param dataMap
@param headClazz
@param fieldName
@return
fastexcel-core/src/main/java/cn/idev/excel/util/ClassUtils.java