hibernate 使用别名查询

如果使用SQL 通过Hibernate查询数据库，如果SQL中使用了别名，则所有的查询字段必须使用别名，并且使用addScalar方法告诉hibernate使用了那些别名，否则，查询会出错。

StringBuffer sql = new StringBuffer();
  sql.append(
    "SELECT sc.id as commentId, sc.content AS commentContent, sc.comment_uid as commentatorUId,sc.created_time as commentCreatedTime,")
    .append(" geo.region_desc as regionDesc, bmForCommentator.realname AS commentatorRealName, bfForCommentator.avatar_mobile AS commentatorAvatar,")
    .append(" sh.content AS shareContent,shc.img_url as shareCoverImgUrl, bmForSharer.realname AS sharerRealName, bfForSharer.avatar_mobile AS sharerAvatar")
    .append(" FROM snsec_axis_share_comment sc")
    .append(" JOIN snsec_axis_share sh ON (sc.share_id = sh.id AND sh.id = ?)")
    .append(" LEFT JOIN snsec_members_geo geo ON (sc.member_geo_id = geo.id)")
    .append(" LEFT JOIN bbs_members bmForCommentator ON (sc.comment_uid = bmForCommentator.uid)")
    .append(" LEFT JOIN bbs_memberfields bfForCommentator ON (sc.comment_uid = bfForCommentator.uid)")
    .append(" LEFT JOIN snsec_axis_share_cover shc ON (sh.uid = shc.uid)")
    .append(" LEFT JOIN bbs_members bmForSharer ON (sh.uid = bmForSharer.uid)")
    .append(" LEFT JOIN bbs_memberfields bfForSharer ON (sh.uid = bfForSharer.uid)")
    .append(" WHERE sc.created_time > ?");

  List

private List

    SQLQuery query = session.createSQLQuery(sql);
    query.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP);
    
    query.addScalar("commentId", Hibernate.BIG_INTEGER);
    query.addScalar("commentContent", Hibernate.STRING);
    query.addScalar("commentatorUId", Hibernate.STRING);
    query.addScalar("commentCreatedTime", Hibernate.TIMESTAMP);
    query.addScalar("regionDesc", Hibernate.STRING);
    query.addScalar("commentatorRealName", Hibernate.STRING);
    query.addScalar("commentatorAvatar", Hibernate.STRING);
    query.addScalar("shareContent", Hibernate.STRING);
    query.addScalar("shareCoverImgUrl", Hibernate.STRING);
    query.addScalar("sharerRealName", Hibernate.STRING);
    query.addScalar("sharerAvatar", Hibernate.STRING);
    if (params != null && params.length > 0) {
     for (int i = 0; i < params.length; i++) {
      query.setParameter(i, params[i]);
     }
    }
    return query.setFirstResult(page.getFirstResult())
      .setMaxResults(page.getRows()).list();
   }
  });
 }