Hibernate 查詢sql結果行數、查詢列表的幾種方法

一、前言

這個東西，難度幾乎沒有，就是繁瑣。

一條簡單的select count（*） from table_name

都能有多種書寫方式。

總是忘，這里記錄下。

一 、通過Criteria 查詢

 查詢行數：

        Criteria criteriaCount = getCriteria();
        criteriaCount = criteriaCount.add(Restrictions.eq("dispatchTaskId", dispatchTaskId));
 criteriaCount.setProjection(Projections.rowCount()); Integer totalCount = ((Long) criteriaCount.uniqueResult()).intValue();

 

查詢列表：

Criteria criteria = getCriteria();
criteria.add(Restrictions.eq("eventId", eventInformationId));
List<EventTaskAssignment> list = criteria.list();

 

二、通過原生sql查詢

查詢行數：

        SQLQuery queryCount = getSession().createSQLQuery("SELECT COUNT(*) FROM incidentInformation  WHERE ii.incidentInformationId = :incidentInformationId AND dti.taskstate = :taskstate");

        queryCount.setParameter("incidentInformationId", incidentInformationId);
        queryCount.setParameter("taskstate", ETaskStatus.STATUS_INIT.getStatusValue());
        int count = ((BigDecimal) queryCount.uniqueResult()).intValue();

        return count;

 查詢列表：

1、返回的item為數據庫表對應po

        SQLQuery query = getSession().createSQLQuery(sqlQuery);
        query.setParameter("userId", userId);

 query.addEntity(EventTaskAssignment.class);         List<EventTaskAssignment> items = query.list();

 

2、返回的item為vo

        SQLQuery query = getSession().createSQLQuery(sqlBuffer.toString());
        query.setParameter("eventInformationId", eventInformationId);
        query.addScalar("userId", StandardBasicTypes.STRING);
        query.addScalar("userName", StandardBasicTypes.STRING);
 query.setResultTransformer(Transformers.aliasToBean(UserRoles.class));         List<UserRoles> list = query.list();

 

三、通過hibernate的查詢語言查詢

        String countHql = "select count(*) from  a  where and a.approveResult = :approveResult and a.approverId = :approverId";
        Query countQuery = getSession().createQuery(countHql);
        countQuery.setParameter("approverId", approverId);
        int count = ((Long) countQuery.uniqueResult()).intValue();