<mapping resource="entity\User.hbm.xml" />
<mapping resource="entity\Topic.hbm.xml" />
<mapping resource="entity\Review.hbm.xml" />
这个些配置全用了\ 需要修改成／这样就ok了。 这个写法在windows的电脑上就可以但是mac不行。
严重: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingNotFoundException: resource: entity\User.hbm.xml not found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1336)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:471)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:217)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:423)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5099)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5615)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.hibernate.MappingNotFoundException: resource: entity\User.hbm.xml not found
at org.hibernate.cfg.Configuration.addResource(Configuration.java:569)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1593)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1561)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1540)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1514)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1449)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:603)
at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1367)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1333)
以下是之前查询用到的资料一并附上，作为参考。属于转载。异常1：
Exception in thread "main" org.hibernate.MappingException: Could not instantiate id generator [entity-name=com.ye.enty.Room]
at org.hibernate.id.factory.DefaultIdentifierGeneratorFactory.createIdentifierGenerator(DefaultIdentifierGeneratorFactory.java:118) at org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:193) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:248) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872) at com.ye.test.Test.main(Test.java:21) Caused by: org.hibernate.MappingException: Could not interpret id generator strategy [navtive] at org.hibernate.id.factory.DefaultIdentifierGeneratorFactory.getIdentifierGeneratorClass(DefaultIdentifierGeneratorFactory.java:137) at org.hibernate.id.factory.DefaultIdentifierGeneratorFactory.createIdentifierGenerator(DefaultIdentifierGeneratorFactory.java:108)... 4 more
解决方法是：主键生成策略那里把错误的navtive单词改成native,如：
<id name="roomId" type="java.lang.Integer"> <column name="ROOMID" /> <generator class="navtive" /><!--改为native--> </id>
异常2：Exception in thread "main" org.hibernate.MappingNotFoundException: resource: com.ye.enty.Room not found at org.hibernate.cfg.Configuration.addResource(Configuration.java:799) at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2344) at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2310) at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2290) at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2243) at org.hibernate.cfg.Configuration.configure(Configuration.java:2158) at org.hibernate.cfg.Configuration.configure(Configuration.java:2137) at com.ye.test.Test.main(Test.java:20)
解决方法是：修正对象映射里面的hibernate.cfg.xml的(两种错误的写法都展示)
<mapping resource="com.ye.enty.Room.hbm.xml"/> <mapping resource="com.ye.enty.Student"/>
把里面的 “.”点（不含引号）改为<mapping resource="com/ye/enty/Room.hbm.xml"/>和 <mapping resource="com/ye/enty/Student.hbm.xml"/>
异常3：Exception in thread "main" org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): com.ye.enty.Student at org.hibernate.id.Assigned.generate(Assigned.java:53) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210) at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195) at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93) at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697) at com.ye.test.Test.main(Test.java:25)
解决方法是：改为对应的数据库主键生成方式，如MySql的，则改为native,Oracle的则改为sequence,里面的参数改为对应的序列
异常4：Exception in thread "main" org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.ye.enty.Room at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:243) at org.hibernate.type.EntityType.getIdentifier(EntityType.java:456) at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:265) at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:275) at org.hibernate.type.TypeHelper.findDirty(TypeHelper.java:295) at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3404) at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:520) at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:230) at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:154) at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219) at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133) at com.ye.test.Test.main(Test.java:27)
解决方法是：用将所有的自由态转成session的游离态。之后调用里面的save();方法。
异常5：
是因为代码中有Transaction的嵌套，如：
Transaction tx1=session.beginTransaction()
Transaction tx2=session.beginTransaction()
tx2.commit();
tx1.commit();
在适用hibernate JPA的时候，不能适用事务嵌套
