hibernate in 查询-JSP教程,Java技巧及代码

   stringbuffer buf = new stringbuffer();   if (!forobject) {    buf.append("select count(*) ");   }   buf.append("from agent agent where 1=1 ");

            string gradeid = (string)conditions.get("gradeid");            if(gradeid != null && !gradeid.equals("") && gradeid != ""){             buf.append(" and agent.gradeid=").append(gradeid);            }   

               buf.append(" and agent.agentid in (:agentids) ");

   query query = sess.createquery(buf.tostring());      list ids = commisioninfodelegateext.findagentidlist(conditions);   system.out.println("ids.length=" + ids.size());   query.setparameterlist("agentids",     ids);

当ids长度为0(空记录)时,query.list()出错.没办法,现在在ids.add("-1"),塞入一条绝对不存在的记录id(绝对是不可能的).