如何从Hibernate查询中返回单个结果对象？ [英] How to return a single result object from hibernate query?

问题描述

查询执行是否总是返回一个列表？

Does a query execution always have to return a list ? How do I replace the code below if I am sure it will only return a single object ?

@Override
    public List<DocInfo> findAllByDocId(String docId)
    {
        Query q = getCurrentSession().createQuery("from DocInfo item where item.id = :docId");
        q.setString("docId", docId);
        List<DocInfo> docInfoList = q.list();
        return docInfoList;
    }

推荐答案

您可以使用查询＃uniqueResult（）与休眠，如果我没有错。我认为这就是你要找的。在这种情况下，如果查询返回多行，则必须在代码中处理 NonUniqueResultException 。

You can use Query#uniqueResult() with Hibernate if I am not wrong. I think that is what you are looking for. In this case, you have to handle the NonUniqueResultException in your code if there is more than one row returned from your query.

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