/** 修改 */
 public boolean update(BaseVo baseVo) {
   Knowledgebase vo = (Knowledgebase) baseVo;
   StringBuffer sql = new StringBuffer();
   sql.append("update system_knowledgebase set category='");
   sql.append(vo.getCategory());
   sql.append("',entity='");
   sql.append(vo.getEntity());
   sql.append("',subentity='");
   sql.append(vo.getSubentity());
   sql.append("',titles='");
   sql.append(vo.getTitles());
   sql.append("',contents='");
   sql.append(vo.getContents());
   sql.append("',bak='");
   sql.append(vo.getBak());
   sql.append("',attachfiles='");
   sql.append(vo.getAttachfiles());
   sql.append("' where id=");
   sql.append(vo.getId());
   return saveOrUpdate(sql.toString());
 }
 /** 保存 */
 public boolean save(BaseVo baseVo) {
   Knowledgebase vo = (Knowledgebase) baseVo;
   StringBuffer sql = new StringBuffer();
   sql.append(
       "insert into system_knowledgebase(category,entity,subentity,titles,contents,bak,attachfiles,userid)values(");
   sql.append("'");
   sql.append(vo.getCategory());
   sql.append("','");
   sql.append(vo.getEntity());
   sql.append("','");
   sql.append(vo.getSubentity());
   sql.append("','");
   sql.append(vo.getTitles());
   sql.append("','");
   sql.append(vo.getContents());
   sql.append("','");
   sql.append(vo.getBak());
   sql.append("','");
   sql.append(vo.getAttachfiles());
   sql.append("','");
   sql.append(vo.getUserid());
   sql.append("');");
   return saveOrUpdate(sql.toString());
 }