尝试使用JPA连接到两个不同的数据库并获取＆＃34; No Persistence provider＆＃34;

Question

我正在尝试连接到两个不同的数据库，我能够连接到一个，但另一个是抛出错误，说“没有持久性提供程序..不确定我在这里做了什么错，但下面是我的persistence.xml，这是放在src / Meta-Inf文件夹下。

<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
    version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">

    <persistence-unit name="test1"
        transaction-type="JTA">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <class>org.jpa.hibernate.test.entity.Agency</class>
        <properties>
            <property name="javax.persistence.jdbc.driver" value="com.ibm.as400.access.AS400JDBCDriver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:as400://host/" />
            <property name="javax.persistence.jdbc.user" value="***" />
            <property name="javax.persistence.jdbc.password" value="***" />
            <property name="hibernate.connection.pool_size" value="1" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.DB2400Dialect" />
            <property name="show_sql" value="true" />
            <property name="hibernate.temp.use_jdbc_metadata_defaults"
                value="false" />
        </properties>
    </persistence-unit>

    <persistence-unit name="test2" transaction-type="JTA">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <!-- <jta-data-source>jdbc/MyDatasource</jta-data-source> -->
        <class>org.jpa.hibernate.test.entity.Student</class>
        <properties>
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost/***" />
            <property name="javax.persistence.jdbc.user" value="***" />
            <property name="javax.persistence.jdbc.password" value="***" />
            <property name="hibernate.connection.pool_size" value="1" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
            <property name="show_sql" value="true" />
            <property name="hibernate.temp.use_jdbc_metadata_defaults"
                value="false" />
        </properties>
    </persistence-unit>
</persistence>

以下是我的整个堆栈跟踪：

log4j:WARN No appenders could be found for logger (org.jboss.logging).
log4j:WARN Please initialize the log4j system properly.
Initial SessionFactory creation failed.javax.persistence.PersistenceException: No Persistence provider for EntityManager named test1
Exception in thread "main" java.lang.ExceptionInInitializerError
    at org.jpa.hibernate.test.entity.EntityManagerUtil.<clinit>(EntityManagerUtil.java:30)
    at org.jpa.hibernate.test.entity.JPAExample.<init>(JPAExample.java:10)
    at org.jpa.hibernate.test.entity.JPAExample.main(JPAExample.java:14)
Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named test1
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:61)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
    at org.jpa.hibernate.test.entity.EntityManagerUtil.<clinit>(EntityManagerUtil.java:15)
    ... 2 more

请帮帮我。

谢谢，