【hibernate】一对多(客户与订单双向关联)遇到的异常

最新推荐文章于 2021-03-06 02:46:46 发布

shai1991

最新推荐文章于 2021-03-06 02:46:46 发布

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分类专栏：异常总结

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本文探讨了Hibernate在初始化过程中常见的配置与映射错误，包括未正确加载配置文件导致的问题及映射文件中包名错误引发的异常。通过具体实例展示了如何定位并解决这些问题。

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1）报错原因：创建Configuration对象没有调用configure()方法，意味着没有加载hibernante.cfg.xml映射文件。
解决办法:创建Configuration对象的同时，要记得调用configure()方法. 例如：Configuration config = new Configuration().configure();

java.lang.ExceptionInInitializerError
at cn.lsh.web.hibernate.dao.CustomerDao.addCustomer(CustomerDao.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Caused by: org.hibernate.HibernateException: 'hibernate.dialect' must be set when no Connection available

at org.hibernate.dialect.resolver.DialectFactory.buildDialect(DialectFactory.java:107)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:142)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2163)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2159)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1383)
at cn.lsh.web.hibernate.utils.HibernateUtils.<clinit>(HibernateUtils.java:12)
... 25 more

2）报错原因：hibernante.cfg.xml(包名写错了)。
解决办法：更正包名路径.
java.lang.ExceptionInInitializerError
at cn.lsh.web.hibernate.dao.CustomerDao.addCustomer(CustomerDao.java:17)

Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from resource cn/lsh/web/hibernate/domain/orders.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:671)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1679)
... 25 more
Caused by: org.hibernate.MappingException: class cn.lsh.web.hibernate.Orders.Orders not found while looking for property: customer
at org.hibernate.util.ReflectHelper.reflectedPropertyClass(ReflectHelper.java:232)
... 32 more
Caused by: java.lang.ClassNotFoundException: cn.lsh.web.hibernate.Orders.Orders
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
... 42 more