spring4+struts2+hibernate5整合时报错，怎么解决？

SEVERE: Context initialization failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.hibernate5.LocalSessionFactoryBean]: No default constructor found; nested exception is java.lang.UnsupportedClassVersionError: org/hibernate/service/ServiceRegistry : Unsupported major.minor version 52.0 (unable to load class org.hibernate.service.ServiceRegistry)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1155)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099)