错误信息如下：

Error is: "weblogic.application.ModuleException: weblogic.application.naming.EnvironmentException: Error processing persistence unit pro_persistence of module xxx.war: Error instantiating the Persistence Provider class org.hibernate.ejb.HibernatePersistence of the PersistenceUnit pro_persistence: java.lang.ClassNotFoundException: org.hibernate.ejb.HibernatePersistence"

weblogic.application.ModuleException: weblogic.application.naming.EnvironmentException: Error processing persistence unit pro_persistence of module xxx.war: Error instantiating the Persistence Provider class org.hibernate.ejb.HibernatePersistence of the PersistenceUnit pro_persistence: java.lang.ClassNotFoundException: org.hibernate.ejb.HibernatePersistence

at weblogic.application.internal.ExtensibleModuleWrapper.prepare(ExtensibleModuleWrapper.java:114)

at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:100)

at weblogic.application.internal.flow.ModuleStateDriver$1.next(ModuleStateDriver.java:192)

at weblogic.application.internal.flow.ModuleStateDriver$1.next(ModuleStateDriver.java:187)

at weblogic.application.utils.StateMachineDriver$ParallelChange.run(StateMachineDriver.java:83)

Truncated. see log file for complete stacktrace

Caused By: weblogic.application.naming.EnvironmentException: Error processing persistence unit pro_persistence of module xxx.war: Error instantiating the Persistence Provider class org.hibernate.ejb.HibernatePersistence of the PersistenceUnit pro_persistence: java.lang.ClassNotFoundException: org.hibernate.ejb.HibernatePersistence

at weblogic.persistence.BasePersistenceUnitInfo.getPersistenceProvider(BasePersistenceUnitInfo.java:604)

at weblogic.persistence.BasePersistenceUnitInfo.initializeEntityManagerFactory(BasePersistenceUnitInfo.java:613)

at weblogic.persistence.BasePersistenceUnitInfo.init(BasePersistenceUnitInfo.java:202)

at weblogic.persistence.BaseJPAIntegrationProvider.createPersistenceUnitInfo(BaseJPAIntegrationProvider.java:54)

at weblogic.persistence.AbstractPersistenceUnitRegistry.storeDescriptors(AbstractPersistenceUnitRegistry.java:422)

Truncated. see log file for complete stacktrace>

解决方法：

首先org.hibernate.ejb.HibernatePersistence在Hibernate里已经是@Deprecated的，所以不建议使用，

1. 如果你用的Hibernate是5.2之前的版本，那很有可能是你缺少相应的jar package, 所以只要在pom.xml里添加相应的dependency，如下：

<dependecny><groupId>org.hibernate</groupId><artifactId>hibernate-entitymanager</artifactId>  <version>{hibernate.version}</version> </dependency>

2. 上面提到过org.hibernate.ejb.HibernatePersistence在Hibernate里已经是@Deprecated了，所以建议使用org.hibernate.jpa.HibernatePersistenceProvider代替。更改项目中相应的persistence.xml文件，如下：

<persistence version="2.0"  xmlns="http://java.sun.com/xml/ns/persistence"            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

<persistence-unit name="pro_persistence" transaction type="RESOURCE_LOCAL"><provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>                <mapping-file>...</mapping-file>                                                            <class>*.*</class>                                                                                </persistence-unit>                                                                                </persistence>

补充：

Hibernate从5.2开始已经是一个空白的jar package了，原来其中的Hibernate's EJB部分已经被一处，而Hibernate's JPA部分已经被移到了hibernate-core.jar package中了。 hibernate-entity-manger-5.2.1.jar抓图如下：