Question

我遇到No Persistence provider for EntityManager例外，无法弄清楚是什么导致了它。这是我的配置文件：

Persistence.xml （存储在src/META-INF）

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
    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">
    <persistence-unit name="HatifimJPA" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <class>entities.HatUser</class>
        <properties>
            <property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver" />
            <property name="hibernate.connection.username" value="Benny" />
            <property name="hibernate.connection.password" value="oracle" />
            <property name="hibernate.connection.url" value="jdbc:oracle:thin:@localhost:1521:xe" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect" />
        </properties>
    </persistence-unit>
</persistence>

例外：

线程“main”中的异常javax.persistence.PersistenceException：没有名为HatifimJPA的EntityManager的持久性提供程序在javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:69）在javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:47）在testing.TestClass.main（TestClass.java:16）

唯一的区别是我试图让EntityManager进入public void main(...) { ... }区块，但是，我不记得过去这样做有问题。

任何人都可以帮忙指出问题所在吗？

Answer 1

尝试将persistence.xml放到src / main / resources / META-INF / 并将此代码放入main方法：

EntityManagerFactory emf = Persistence.createEntityManagerFactory("HatifimJPA");
EntityManager em = emf.createEntityManager();

没有EntityManager Hibernate的持久性提供程序

1 个答案: