如果我创建一个复合主键类,但它没有实现Serializable接口,就像下面这样:
@Entity
@Table(name = "board")
public class Board {
@Id
@Column(name = "keyword_news_id")
private int id;
@Id
@Column(name = "board_no")
private int boardNo;
....
出现的错误可能如下:
Caused by: org.hibernate.MappingException: composite-id class must implement Serializable: com.estinternet.news.domain.IssueNewsBoard
at org.hibernate.mapping.RootClass.checkCompositeIdentifier(RootClass.java:263)
at org.hibernate.mapping.RootClass.validate(RootClass.java:244)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1362)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1865)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:860)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:779)
at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417)
Hibernate实体类不需要实现Serializable接口。那么,为什么复合ID类必须实现Serializable接口呢?我读了这个帖子,但它没有给我足够的信息。
@IdClass
在哪里? - user3973283@IdClass
应该在另一个我没有添加到这里的类中。 - Sanghyun Lee