JPA系列1-JPA环境搭建

最新推荐文章于 2022-06-11 08:10:21 发布

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本文介绍了解决JPA在JEE5环境中遇到的包冲突问题的方法，通过升级到JEE6并配置persistence.xml文件来避免异常。

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JPA在JEE环境下有冲突。

其中JEE5中由于JEE的包与hibernate-jpa-2.0-api-1.0.1.jar冲突，异常信息如下：

Exception in thread "main" java.lang.NoSuchMethodError: javax.persistence.OneToMany.orphanRemoval()Z
at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1912)
at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:796)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:707)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:4035)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3989)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1398)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1375)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1519)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1100)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:282)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:366)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
at com.ssc.jpa.Test.main(Test.java:16)

解决方式：将JEE5更换为JEE6，需要在persistence.xml文件中加入一句：

<property name="javax.persistence.validation.mode" value="none"></property>

否则也会报错，错误提示如下：

Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: jpaDemo] Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:378)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:78)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
at com.ssc.jpa.Test.main(Test.java:16)
Caused by: org.hibernate.HibernateException: Unable to get the default Bean Validation factory
at org.hibernate.cfg.beanvalidation.BeanValidationActivator.applyDDL(BeanValidationActivator.java:127)
at org.hibernate.cfg.Configuration.applyBeanValidationConstraintsOnDDL(Configuration.java:1704)
at org.hibernate.cfg.Configuration.applyConstraintsToDDL(Configuration.java:1654)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1445)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1375)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1519)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1100)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:282)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:366)
... 4 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.hibernate.cfg.beanvalidation.BeanValidationActivator.applyDDL(BeanValidationActivator.java:118)
... 13 more
Caused by: org.hibernate.HibernateException: Unable to build the default ValidatorFactory
at org.hibernate.cfg.beanvalidation.TypeSafeActivator.getValidatorFactory(TypeSafeActivator.java:383)
at org.hibernate.cfg.beanvalidation.TypeSafeActivator.applyDDL(TypeSafeActivator.java:109)
... 18 more
Caused by: javax.validation.ValidationException: Unable to instantiate Configuration.
at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:272)
at javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:111)
at org.hibernate.cfg.beanvalidation.TypeSafeActivator.getValidatorFactory(TypeSafeActivator.java:380)
... 19 more
Caused by: java.lang.NullPointerException
at java.util.ResourceBundle.getBundle(ResourceBundle.java:1026)
at org.hibernate.validator.engine.ResourceBundleMessageInterpolator.loadBundle(ResourceBundleMessageInterpolator.java:202)
at org.hibernate.validator.engine.ResourceBundleMessageInterpolator.getFileBasedResourceBundle(ResourceBundleMessageInterpolator.java:182)
at org.hibernate.validator.engine.ResourceBundleMessageInterpolator.<init>(ResourceBundleMessageInterpolator.java:81)
at org.hibernate.validator.engine.ResourceBundleMessageInterpolator.<init>(ResourceBundleMessageInterpolator.java:73)
at org.hibernate.validator.engine.ConfigurationImpl.<init>(ConfigurationImpl.java:57)
at org.hibernate.validator.HibernateValidator.createGenericConfiguration(HibernateValidator.java:43)
at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:269)
... 21 more