Question

我正在尝试遵循this教程。当他们运行代码时，它是成功的。运行代码时，出现错误消息WARNING: javax.persistence.spi::No valid providers found.，我查看了文档并明确定义了实体/提供者。我确实为.jpa.HibernatePersistenceProvider使用了一些红色错误字体，因为它表示无法解析该类。这是主要班级

@PersistenceUnit(unitName = "org.hibernate.tutorial.jpa")
private static EntityManagerFactory entityManagerFactory;

public static void main(String[] args){

    entityManagerFactory = Persistence.createEntityManagerFactory("org.hibernate.tutorial.jpa");

    Client client = new Client();
    client.setId(2);
    client.setName("bob");

    Bank bank = new Bank();
    bank.setName("wells fartgo");

    EntityManager entityManager = entityManagerFactory.createEntityManager();

    entityManager.getTransaction().begin();

    entityManager.persist(client);
    entityManager.persist(bank);
    entityManager.getTransaction().commit();

    entityManagerFactory.close();
}

/ resources / WEB_INF中的persistence.xml

<?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="org.hibernate.tutorial.jpa">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <properties>
        <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
        <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/classicmodels"/>
        <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"/>

        <property name="hibernate.cache.region.factory_class"
        value="org.hibernate.cache.ehcache.EhCacheRegionFactory"/>
        <property name="hibernate.javax.cache.provider" value="org.ehcache.jsr107.EhcacheCachingProvider"/>
        <!--use second level cache-->
        <property name="hibernate.cache.use_second_level_cache" value="true"/>
        <!--use 3rd level cache-->
        <property name="hibernate.cache.use_query_cache" value="true"/>
    </properties>
</persistence-unit>

也是我的pom.xml

<dependencies>
    <dependency>
        <groupId>org.clojure</groupId>
        <artifactId>java.jdbc</artifactId>
        <version>0.7.0-alpha3</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>6.0.0.Alpha2</version>
        <type>pom</type>
    </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>${hibernate-core-version}</version>
        </dependency>
    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <version>LATEST</version>
    </dependency>
</dependencies>

主要（银行/客户）中的类只有getter和setter，所以没有错。如果有人可以让我知道如何成功运行此演示，那将很棒。谢谢。

Java持续性错误没有有效的提供者

0 个答案: