当我尝试在我的代码中创建实体管理器时出现此错误。
EntityManagerFactory emf = Persistence.createEntityManagerFactory("puDS1", myproperties);
关于为什么会发生这种情况的任何提示?我的 persistence.xml 似乎是一个有效的 xml。
ERROR [main] (PersistenceXmlLoader.java:251) - Error parsing XML: XML InputStream(1) Premature end of file.
javax.persistence.PersistenceException: Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:265)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:125)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52)
Caused by: org.xml.sax.SAXParseException: Premature end of file.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at org.hibernate.ejb.packaging.PersistenceXmlLoader.loadURL(PersistenceXmlLoader.java:70)
at org.hibernate.ejb.packaging.PersistenceXmlLoader.deploy(PersistenceXmlLoader.java:89)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:222)
... 4 more
持久性 xml 看起来像这样。请注意,我在这个 persistence.xml 上使用了 maven 资源过滤,因此在编译期间 ${jar_file_name_ds1} 和 ${jar_file_name_ds2} 被替换为有效名称。我已经验证了最终的 persistence.xml 已正确替换了值。我不知道 Maven 资源过滤是否搞砸了。
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" version="2.0">
<persistence-unit name="puDS1" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jar-file>${jar_file_name_ds1}</jar-file>
<properties>
<property name="hibernate.max_fetch_depth" value="3"/>
</properties>
</persistence-unit>
<persistence-unit name="puDS2" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jar-file>${jar_file_name_ds2}</jar-file>
<properties>
<property name="hibernate.max_fetch_depth" value="3"/>
</properties>
</persistence-unit>
</persistence>