docs: private static <T> T mapByIndex(byte[] content, Class<T> genericType, ObjectMetaData objectMap, Charset charset)
              throws InstantiationException, IllegalAccessException, InvocationTargetException {
  
          List<FieldMetaData> mappingFields = objectMap.getFieldList();
          T obj = genericType.newInstance();
          for (int i = 0; i < mappingFields.size(); i++) {
              FieldMetaData field = mappingFields.get(i);
              // 设置属性值
              LOGGER.debug("设置值是 " + field + field.getValue(content, charset));
              BeanUtils.setProperty(obj, field.getFieldName(), field.getValue(content, charset));
          }
  
          return obj;
      }