configurar el applicationContext.xml de spring

buenos dias, estoy iniciando un proyecto en spring mvc y cada vez que creo un bean nuevo me presenta error:

error creating bean with name 'entityManagerFactory' defined in class path resource [test-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: springappPU] Unable to build EntityManagerFactory
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [test-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: springappPU] Unable to build EntityManagerFactory.

mi applicationContext.xml es:
 

muchas gracias.