日期:2014-05-18  浏览次数:20689 次

Hibernate中主建生成器问题请教!
Exception   in   thread   "main "   org.hibernate.MappingException:   could   not   instantiate   id   generator
at   org.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:97)
at   org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:152)
at   org.hibernate.impl.SessionFactoryImpl. <init> (SessionFactoryImpl.java:182)
at   org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1176)
at   shop.lbh.fuzhu.HibernateSessionFactory.getSession(HibernateSessionFactory.java:17)
at   shop.lbh.fuzhu.DbOperate.getSorts(DbOperate.java:141)
at   shop.lbh.fuzhu.getSort.main(getSort.java:11)
Caused   by:   org.hibernate.MappingException:   Dialect   does   not   support   sequences
at   org.hibernate.dialect.Dialect.getSequenceNextValString(Dialect.java:531)
at   org.hibernate.id.SequenceGenerator.configure(SequenceGenerator.java:65)
at   org.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:93)
...   6   more
程序运行老是出现上面的异常错误:(
Sort.hbm.xml文件配置如下: <?xml   version= "1.0 "   encoding= "utf-8 "?>
<!DOCTYPE   hibernate-mapping   PUBLIC   "-//Hibernate/Hibernate   Mapping   DTD   3.0//EN "
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd ">
<!--  
        Mapping   file   autogenerated   by   MyEclipse   -   Hibernate   Tools
-->
<hibernate-mapping>
        <class   name= "shop.lbh.vo.Sort "   table= "sort "   schema= "dbo "   catalog= "shoppingOnlineDatabase ">
                <id   name= "id "   type= "java.lang.Integer ">
                        <column   name= "id "   />
                        <generator   class= "identity "/>
                </id>
                <property   name= "name "   type= "java.lang.String ">
                        <column   name= "name "   length= "40 "   not-null= "true "   />
                </property>
        </class>
</hibernate-mapping>
请求大家的帮忙,谢谢!


------解决方案--------------------
不是这个XML文件,是你的那个hibernate.cfg.xml(默认应该是这个)有问题。
Caused by: org.hibernate.MappingException: Dialect does not support sequences
你那个文件里dialect设置的估计是oracle,但你用的却不是oracle数据库

------解决方案--------------------
at shop.lbh.fuzhu.HibernateSessionFactory.getSession(HibernateSessionFactory.java:17)