<code>Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] </code> ya intente con algunas versiones de ...

Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]

ya intente con algunas versiones de hibernate pero sigue el error, encuentra el archivo hibernate.cfg.xml ya que me muestra esto en la consola

ago 30, 2018 2:32:38 P.M. org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.1.0.Final}
ago 30, 2018 2:32:38 P.M. org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
ago 30, 2018 2:32:38 P.M. org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
ago 30, 2018 2:32:39 P.M. org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
ago 30, 2018 2:32:39 P.M. org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
ago 30, 2018 2:32:39 P.M. org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql//localhost:3306/javaplatzi]
ago 30, 2018 2:32:39 P.M. org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {password=****, pool_size=true, user=nu}
ago 30, 2018 2:32:39 P.M. org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
ago 30, 2018 2:32:39 P.M. org.hibernate.engine.jdbc.connections.internal.PooledConnections <init>
INFO: HHH000115: Hibernate connection pool size: 20 (min=1)
org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]```

llevo un rato con esto, ya vi comentarios por aqui pero me sigue saliendo el error, alguien podria ayudarme de favor, gracias.