public BaseVo loadFromRS(ResultSet rs) {
    Knowledgebase vo = new Knowledgebase();

    try {
      vo.setId(rs.getInt("id"));
      vo.setCategory(rs.getString("category"));
      vo.setEntity(rs.getString("entity"));
      vo.setSubentity(rs.getString("subentity"));
      vo.setTitles(rs.getString("titles"));
      vo.setContents(rs.getString("contents"));
      vo.setBak(rs.getString("bak"));
      vo.setAttachfiles(rs.getString("attachfiles"));
      vo.setUserid(rs.getString("userid"));
      vo.setKtime(rs.getString("ktime"));
    } catch (Exception e) {
      e.printStackTrace();
      vo = null;
    }
    return vo;
  }