docs: private int getFieldSize(Field field) {//
          if (String.class == field.getType()) {
              return this.max;
          } else if (long.class == field.getType()) {
              return OtherConstants.FDFS_PROTO_PKG_LEN_SIZE;
          } else if (int.class == field.getType()) {
              return OtherConstants.FDFS_PROTO_PKG_LEN_SIZE;
          } else if (java.util.Date.class == field.getType()) {
              return OtherConstants.FDFS_PROTO_PKG_LEN_SIZE;
          } else if (byte.class == field.getType()) {
              return 1;
          } else if (boolean.class == field.getType()) {
              return 1;
          } else if (Set.class == field.getType()) {
              return 0;
          }
          throw new FdfsColumnMapException(field.getName() + "获取Field大小时未识别的FdfsColumn类型" + field.getType());
      }