在JBoss AS 7中找不到持久性提供程序

Question

我刚刚从Tomcat迁移到JBoss7。因此，我在JBoss中配置了Mysql datasource（添加module.xml和相关的Jar，将驱动程序块添加到standalone.xml中，并通过JBoss接口配置datasource）。

部署时没有错误，但不可能获得entityManager（后台有Hibernate的JPA）。

Persistence.createEntityManagerFactory("RoomManagement");

Exception：没有名为RoomManagement javax.Persistence.Persistence.createEntityManagerFactory（Persistence.java:69)javax.Persistence.createEntityManagerFactory（Persistence.java:47)的EntityManagerFactory（Persistence.java:47)

非常奇怪，因为我很好地验证了我的persistence.xml确实在WEB-INF/classes/META-INF目录下发生了War。

我的persistence.xml如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">

    <persistence-unit name="RoomManagement" transaction-type="JTA">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>java:jboss/datasources/MySqlDS</jta-data-source>
        <class>com.parisdescartes.roommanagement.domain.entities.Address</class>
        <class>com.parisdescartes.roommanagement.domain.entities.Building</class>
        <class>com.parisdescartes.roommanagement.domain.entities.Civility</class>
        <class>com.parisdescartes.roommanagement.domain.entities.EventType</class>
        <class>com.parisdescartes.roommanagement.domain.entities.Job</class>
        <class>com.parisdescartes.roommanagement.domain.entities.Reservation</class>
        <class>com.parisdescartes.roommanagement.domain.entities.Room</class>
        <class>com.parisdescartes.roommanagement.domain.entities.RoomType</class>
        <class>com.parisdescartes.roommanagement.domain.entities.Tool</class>
        <class>com.parisdescartes.roommanagement.domain.entities.User</class>
        <class>com.parisdescartes.roommanagement.domain.entities.UserDetail</class>
        <class>com.parisdescartes.roommanagement.domain.entities.Schedule</class>
        <properties>
            <property name="hibernate.connection.autocommit" value="true" />
            <property name="hibernate.archive.autodetection" value="class"/>
            <property name="hibernate.show_sql" value="true"/>
            <property name="hibernate.format_sql" value="true"/>
            <property name="hbm2ddl.auto" value="update"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
        </properties>
    </persistence-unit>
</persistence> 

我是不是搞错了或者忘了具体说明什么？

Answer 1

从WEB-INF/lib中删除hibernate jar。JBoss已经绑定了它，所以如果您将它放在类路径上，它可能会混淆类加载器。