getsingleresult 为空报错 javax.persistence.NoResultException: No entity found for query
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getresultlist允许为空
修改如下
public Knowledge getKnowledge(String knowkey) {String hql = "from Knowledge k where k.knowkey = :knowkey";Query query = CreateSession().createQuery(hql, Knowledge.class);query.setParameter("knowkey", knowkey);if (query.getResultList().size() == 0) {return null;} else {return (Knowledge) query.getSingleResult();}} 1 0
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