问使用Hibernate作为我的JPA提供程序时出现的各种错误
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Stack Overflow用户

提问于 2016-05-06 02:57:04

回答 1查看 1.2K关注 0票数 0

我正在尝试使用JPA，所以我遵循了一个指南，并尝试用Hibernate自己完成它。我创建了一个只有两个变量的实体"testEntity“，并创建了一个带有测试方法的测试类。

我的连接池有一个JDBC连接，该连接已经过测试并正在工作。我配置了我的持久性单元来使用它。查看我的persistence.xml：

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
             http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
             version="2.1">

<persistence-unit name="PruebaswebPU" transaction-type="JTA">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider    </provider>
    <jta-data-source>java:app/jdbc/nuevaConexion</jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="javax.persistence.schema-generation.database.action" value="create"/>
    </properties>
  </persistence-unit>
</persistence>

我在我的考试课上用它：

  EntityManagerFactory emfactory = Persistence.createEntityManagerFactory("PruebaswebPU");
        EntityManager entitymanager = emfactory.createEntityManager();
        entitymanager.getTransaction().begin();

        testEntity ent = new testEntity();
        ent.setId(5l);
        ent.setNombre("Nombraco");

        entitymanager.persist(ent);
        entitymanager.getTransaction().commit();

        entitymanager.close();
        emfactory.close();

..。但我发现了很多错误：

may 06, 2016 12:52:26 PM org.hibernate.ejb.HibernatePersistence logDeprecation WARN: HHH015016: Encountered a deprecated javax.persistence.spi.PersistenceProvider [org.hibernate.ejb.HibernatePersistence]; use [org.hibernate.jpa.HibernatePersistenceProvider] instead.
may 06, 2016 12:52:26 PM org.hibernate.ejb.HibernatePersistence logDeprecation WARN: HHH015016: Encountered a deprecated javax.persistence.spi.PersistenceProvider [org.hibernate.ejb.HibernatePersistence]; use [org.hibernate.jpa.HibernatePersistenceProvider] instead. 
may 06, 2016 12:52:26 PM org.hibernate.ejb.HibernatePersistence logDeprecation WARN: HHH015016: Encountered a deprecated javax.persistence.spi.PersistenceProvider [org.hibernate.ejb.HibernatePersistence]; use [org.hibernate.jpa.HibernatePersistenceProvider] instead. 

Exception in thread "main" javax.persistence.PersistenceException: Unable to locate persistence units   
at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:99) 
    at org.hibernate.ejb.HibernatePersistence.getEntityManagerFactoryBuilderOrNull(HibernatePersistence.java:93)
    at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:86)
    at org.hibernate.ejb.HibernatePersistence.getEntityManagerFactoryBuilderOrNull(HibernatePersistence.java:101)
    at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:67)
    at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)     
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
at testing.samplePersistence.main(samplePersistence.java:20)

Caused by: javax.persistence.PersistenceException: Invalid persistence.xml. Error parsing XML [line : -1, column : -1] : cvc-complex-type.2.4.b: El contenido del elemento 'persistence' no está completo. Se esperaba uno de '{"http://xmlns.jcp.org/xml/ns/persistence":persistence-unit}'.
at org.hibernate.jpa.boot.internal.PersistenceXmlParser.validate(PersistenceXmlParser.java:377)     
at org.hibernate.jpa.boot.internal.PersistenceXmlParser.loadUrl(PersistenceXmlParser.java:310)  
at org.hibernate.jpa.boot.internal.PersistenceXmlParser.parsePersistenceXml(PersistenceXmlParser.java:114) 
at org.hibernate.jpa.boot.internal.PersistenceXmlParser.doResolve(PersistenceXmlParser.java:104)    
at org.hibernate.jpa.boot.internal.PersistenceXmlParser.locatePersistenceUnits(PersistenceXmlParser.java:86) 
at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:95)    ... 8 more 
C:\Users\hp\AppData\Local\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1 BUILD FAILED (total time: 0 seconds)

我是不是遗漏了什么？提前感谢！

编辑：

Netbeans在此项目中使用的自动添加库的一个小屏幕截图：

库

hibernate

jpa

persistence.xml

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回答 1

Stack Overflow用户

发布于 2016-05-06 03:15:54

您的问题是persistence.xml不完整。你可能需要一些额外的部分。要了解更多信息，您可以通过这个教程。

persistence.xml**.** 您的也有额外的空间

persistence.xml中的第一个变化

<provider>org.hibernate.jpa.HibernatePersistenceProvider    </provider>

至

<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

那就跑吧。如果有什么问题，就通知我。

更新：

请将版本更改如下：

<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">