PAS部署：业务应用部署报错：No qualifying bean of type 'javax.persistence.EntityManagerFactory' available

问题

普元 AppServer 6.5 业务应用部署报错：

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'javax.persistence.EntityManagerFactory' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:660)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1413)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:601)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)

     ......

问题原因

应用引用的activiti-spring-boot-starter-basic-6.0.0.jar的org.activiti.spring.boot.JpaProcessEngineAutoConfiguration类的@ConditionalOnClass(name= "javax.persistence.EntityManagerFactory")，根据javax.persistence.EntityManagerFactory类去创建bean，和javax.persistence中的冲突了

解决方案

项目里参考https://www.cnblogs.com/jiangwz/p/9758742.html中的方法，引入了activiti-spring-boot-starter-jpa的jar。

引入了jpa的jar后，报了如下新异常java.lang.NoSuchMethodError: org.apache.ibatis.session.Configuration.getLanguageDriver(Ljava/lang/Class;)Lorg/apache/ibatis/scripting/LanguageDriver，这个异常是因为项目里存在org.apache.ibatis.session的jar冲突，解决了这个冲突后，应用部署不报错了。