hibernate in 查询

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).