【发布时间】：2015-07-01 09:34:36
【问题描述】：
我正在尝试运行一个基于 JPA 的示例项目。我总是从标题中得到错误。
我看过这里： No Persistence provider for EntityManager named
但没有找到可行的解决方案。
这是我的 pom.xml：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>~path.example</groupId>
<artifactId>example</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>ejb3-persistence</artifactId>
<version>3.3.2.Beta1</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.3.9.Final</version>
</dependency>
<dependency>
<groupId>org.eclipse.jst.server.generic</groupId>
<artifactId>oc4j</artifactId>
<version>1.5.105-v200709061325</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.2.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.common</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>4.0.1.Final</version>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>org.jboss.logging</groupId>
<artifactId>jboss-logging</artifactId>
<version>3.1.0.CR2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>org.jboss.spec</groupId>
<artifactId>jboss-javaee-6.0</artifactId>
<version>1.0.0.Final</version>
<type>provided</type>
<scope>pom</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.spec</groupId>
<artifactId>jboss-javaee-6.0</artifactId>
<version>1.0.0.Final</version>
<type>pom</type>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.container</groupId>
<artifactId>arquillian-weld-ee-embedded-1.1</artifactId>
<version>1.0.0.CR3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.weld</groupId>
<artifactId>weld-core</artifactId>
<version>1.1.5.Final</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.6.4</version>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.jboss.arquillian</groupId>
<artifactId>arquillian-bom</artifactId>
<version>1.1.8.Final</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
</project>
我可能有一些我不需要的依赖项。由于我经验不足，我必须诚实承认，我非常绝望并寻找任何可能的答案，并且在此过程中我添加了一些可能根本不会使用的依赖项。
这是创建 EntityManager 的类
package ~path.examples.service;
import ~path.examples.testjpa.domain.Person;
import javax.persistence.*;
/**
* Created by ME on 2015-04-22.
*/
public class JpaTest {
public static void main(String args[]) {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("jpaTest");
EntityManager em = entityManagerFactory.createEntityManager();
EntityTransaction userTransaction = em.getTransaction();
userTransaction.begin();
Person person = new Person();
person.setFirstName("Charles");
person.setSurname("Dickens");
em.persist(person);
userTransaction.commit();
em.close();
entityManagerFactory.close();
}
}
还有：
-
我很确定所有文件都在适当的位置，我也遇到了一些问题，但我似乎已经消除了这个问题（比以前弹出的其他错误）:)
我可能很明显遗漏了一些东西，提前感谢您的帮助！
edit：问题很可能出在persistance.xml文件中，所以在这里（感谢指出）。文件的位置是 src/main/resources/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="JpaTest" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>~path.examples.testjpa.domain.Person</class>
<properties>
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.dialect" value="org.hibernate.dialect.DerbyDialect" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
</persistence>
【问题讨论】：
-
你有 persistence.xml 文件吗？
-
假设是：它在哪里？ “我很确定”不是隐藏细节的理由，因为您犯了错误的选项仍然存在。你自己这么说。
-
是的，我当然有，我打算把它贴出来。已编辑，感谢您的指出，只是忘记了:) 顺便说一句，该位置几乎可以肯定是正确的（我必须承认我做了一些实验，在任何其他位置甚至都不会被检测到）但很可能有是文件中的错误，我没有看到。
标签： java hibernate maven jpa orm