休眠错误：名为my-unit的EntityManager的持久性提供程序

Question

我试图将我的persistence.xml放入Java项目的各个部分，并使用以下命令将其调用：

EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("my-unit");

但它返回一个错误：

Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named my-unit
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at main.MainClass.main(MainClass.java:81)
Process finished with exit code 1

我的persistence.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
         http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="my-unit">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>

    <properties>
        <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
        <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/test"/>
        <property name="hibernate.connection.autocommit" value="false"/>
        <property name="hibernate.connection.username" value="root"/>
        <property name="hibernate.connection.password" value=""/>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
        <property name="hibernate.connection.CharSet" value="utf8"/>
        <property name="hibernate.connection.characterEncoding" value="utf8"/>
        <property name="hibernate.connection.useUnicode" value="true"/>
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.hbm2ddl.auto" value="update"/>
        <!-- use encache provider-->
        <!--<property name="hibernate.cache.region.factory_class"-->
        <!--value="org.hibernate.cache.ehcache.EhCacheRegionFactory"/>-->
        <!--<property name="hibernate.javax.cache.provider" value="org.ehcache.jsr107.EhcacheCachingProvider"/>-->
        <!--&lt;!&ndash;use second level cache&ndash;&gt;-->
        <!--<property name="hibernate.cache.use_second_level_cache" value="true"/>-->
        <!--&lt;!&ndash;use 3rd level cache&ndash;&gt;-->
        <!--<property name="hibernate.cache.use_query_cache" value="true"/>-->
    </properties>
</persistence-unit>

[我使用IntelliJ作为Java的IDE，persistence.xml文件位于META-INF文件夹中的resources文件夹下，我尝试检查项目结构，并且看起来都不错。我使用休眠作为Maven仓库。感谢您的帮助

Answer 1