你看看你加粗的這一行，是你的數據庫方言dialect出錯了，看看是否有jar包還是你的jar包不匹配的問題，又或者你輸入的時候打錯了。

WARN: HHH000181: No appropriate connection provider encountered, assuming application will be supplying connections
Exception in thread "main" java.lang.ExceptionInInitializerError
?? ?at com.imooc.test.Test.add(Test.java:37)
?? ?at com.imooc.test.Test.main(Test.java:19)
Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
?? ?at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:104)
?? ?at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:71)
?? ?at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:209)
?? ?at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:89)
?? ?at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:206)
?? ?at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:178)
?? ?at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1885)
?? ?at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1843)
?? ?at com.imooc.util.HibernateUtil.<clinit>(HibernateUtil.java:18)
?? ?... 2 more

將hibernate.cfg.xml改為下面的代碼再試試,注意賬戶密碼等個人配置得改為自己的哈

<!DOCTYPE hibernate-configuration PUBLIC

? ? ? ? "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

? ? ? ? "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

? ? ? ? ??

<hibernate-configuration>

<session-factory>

<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

<property name="hibernate.connection.username">root</property>

<property name="hibernate.connection.password">123</property>

<property name="hibernate.connection.url">

? ? ? ? <![CDATA[

? ? ? ? jdbc:mysql://localhost:3306/imooc?characterEncoding=utf8

? ? ? ? ]]>

? ? ? ? </property>

? ? ? ??

<property name="hibernate.dialet">org.hibernate.dialect.MySQLDialect</property>

<property name="show_sql">true</property>

<property name="hbm2ddl.auto">update</property>

<!-- 指定映射文件的路徑 -->

<mapping resource="com/imooc/entity/Grade.hbm.xml"/>

<mapping resource="com/imooc/entity/Student.hbm.xml"/>

</session-factory>

</hibernate-configuration>

重新看視頻