Question

我刚刚从Tomcat迁移到JBoss AS 7。因此，我在JBoss中配置了Mysql数据源（添加了带有关联Jar的module.xml，将驱动程序块添加到standalone.xml并通过JBoss接口配置数据源。

部署时没有错误但是无法获得entityManager（后台使用Hibernate的JPA）。

确实，当执行此代码时：

Persistence.createEntityManagerFactory("RoomManagement");

我收到此错误：

javax.persistence.PersistenceException：没有持久性提供程序 EntityManager名为RoomManagement javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:69） javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:47）

非常奇怪，因为我已经证实我的persistence.xml确实发生在WEB-INF / classes / META-INF目录下的War中。

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>

我犯了错误或忘记指定某事吗？

Answer 1

从WEB-INF/lib中删除休眠jar。 JBoss有捆绑，所以如果你在类路径上有它，它可能会混淆类加载器。

JBoss AS 7没有找到持久性提供程序

1 个答案: