没有为EntityManager命名的持久性提供程序 [英] No Persistence provider for EntityManager named

问题描述

我在META-INF目录下使用toplink创建了具有相同名称的persistence.xml。
然后我用我的代码调用它：

I have my persistence.xml with the same name, using toplink, under META-INF directory. Then I have my code calling it with:

EntityManagerFactory emfdb = Persistence.createEntityManagerFactory("agisdb");

然而，我收到以下错误消息

Yet, I got the following error message

2009-07-21 09:22:41,018 [main] ERROR - No Persistence provider for EntityManager named agisdb
javax.persistence.PersistenceException: No Persistence provider for EntityManager named agisdb
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:89)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)

这是persistence.xml：

Here is the persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
    <persistence-unit name="agisdb">
        <class>com.agis.livedb.domain.AddressEntity</class>
        <class>com.agis.livedb.domain.TrafficCameraEntity</class>
        <class>com.agis.livedb.domain.TrafficPhotoEntity</class>
        <class>com.agis.livedb.domain.TrafficReportEntity</class>
        <properties>
            <property name="toplink.jdbc.url" value="jdbc:mysql://localhost:3306/agisdb"/>
            <property name="toplink.jdbc.driver" value="com.mysql.jdbc.Driver"/>
            <property name="toplink.jdbc.user" value="root"/>
            <property name="toplink.jdbc.password" value="password"/>
        </properties>
    </persistence-unit>
</persistence>

它应该在类路径中。然而，我得到了上述错误。

It should have been in the classpath. Yet, I got the above error.

推荐答案

在之后< persistence-unit name =agisdb > ，定义持久性提供程序名称：

After <persistence-unit name="agisdb">, define the persistence provider name:

<provider>org.hibernate.ejb.HibernatePersistence</provider>

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