oi pessoal, vi alguns posts mas não consegui resolver. (tentei usar o mesmo pom.xml do projeto do professor mas deu erro no próprio xml.)
2018-07-11 15:30:03.645 INFO 6412 --- [ main] o.s.j.d.DriverManagerDataSource : Loaded JDBC driver: com.mysql.jdbc.Driver
Wed Jul 11 15:30:04 BRT 2018 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
2018-07-11 15:30:04.503 WARN 6412 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NoSuchMethodError: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.setPersistenceUnitRootLocation(Ljava/lang/String;)V
2018-07-11 15:30:04.517 INFO 6412 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
2018-07-11 15:30:04.547 INFO 6412 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-07-11 15:30:04.564 ERROR 6412 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NoSuchMethodError: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.setPersistenceUnitRootLocation(Ljava/lang/String;)V
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFac...
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NoSuchMethodError: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.setPersistenceUnitRootLocation(Ljava/lang/String;)V
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
... 18 common frames omitted
Caused by: java.lang.NoSuchMethodError: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.setPersistenceUnitRootLocation(Ljava/lang/String;)V
at org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder$Builder.build(EntityManagerFactoryBuilder.java:209) ~[spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.entityManagerFactory(JpaBaseConfiguration.java:128) ~[spring-boot-autoconfigure-1.4.1.RELEASE.jar:1.4.1.RELEASE]
....