java.lang.ClassCastException：org.hibernate.internal.SQLQueryImpl 无法转换为 java.util.List 如何修复

Question

 List<Candidate> candidates = (List<Candidate>) session.createSQLQuery("select candidate.* from candidate inner join candidate_skill on candidate.id = candidate_skill.candidate_id inner join skill on candidate_skill.skill_id = skill.id where skill.id = 1");       

我明白了：

 java.lang.ClassCastException: org.hibernate.internal.SQLQueryImpl cannot be cast to java.util.List

查询正确。如何解决？

Answer 1

查询未返回任何内容，您正在尝试将其分配给 List

你应该这样做

 List<Candidate> candidates = (List<Candidate>) session.createSQLQuery
               ("select candidate.* from candidate inner join 
                    candidate_skill on candidate.id = candidate_skill.
                        candidate_id inner join skill on 
                  candidate_skill.skill_id = skill.id 
                                          where skill.id = 1").list();

A simple native query example

Answer 2

您在查询结束时忘记了.list()。

应该是这样的

................skill.id where skill.id = 1").list();

更多信息请参考hibernate documentation。