随笔分类 - Hibernate
Caused by: org.hibernate.NonUniqueObjectException
摘要:在做项目中碰见这样的问题,如下:Caused by: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.pcis.cus.vo.CusClientVO#002255207]; 原...
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表外键在SQL语句中的取法
摘要:有两张表(question、answer),它们存在着一对多关系(question->answer)和多对一关系(answer->question)。 在Answer.java中定义有: public class Answer { private String userid; private Question question; private int qid; } 在a...
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Hibernate中hql的语句问题
摘要:org.hibernate.hql.ast.QuerySyntaxError: user is not mapped. [from user as u where u.userid=?] 出现这个问题,主要是hibernate语句不对。 User.hbm.xml为: 因此,hql 语句如下: Strin...
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