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我正在尝试从 Play 2.0 Scala 应用程序中使用 JPA。在我的代码中，我有：

val factory = Persistence.createEntityManagerFactory("devcrowd")

我也有persistence.xml包装META-INF：

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/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">
<persistence-unit name="devcrowd" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
        <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
        <property name="hibernate.connection.username" value="xxxx"/>
        <property name="hibernate.connection.password" value="xxxx"/>
        <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/devcrowd"/>
    </properties>
</persistence-unit>
</persistence>

这个 persistence.xml 对我来说似乎有效，但无法创建工厂：

PersistenceException: No Persistence provider for EntityManager named devcrowd
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1 回答 1

1

您在部署时缺少 Hibernate 库。

于 2012-04-29T09:41:54.010 回答