code: private static Pair<String, String> getColumnName(Field field) {
          String fieldName = field.getName();
          Column column    = field.getAnnotation(Column.class);
          if (null != column && StringUtils.isNotBlank(column.name())) {
              fieldName = column.name();
          }
          String columnName = NameUtils.getUnderlineName(fieldName);
          return new Pair<>(columnName, fieldName);
      }
docs: Pair<ColumnName, FieldName>
  
  @param field 字段
  @return 返回列名和字段名