您好我正在構建一個與maven
和jpa
的Java應用程序。我有一個數據庫項目是我的主應用程序的依賴項。數據庫項目在開發模式下是完全可用的,但是當我生成一個jar時,出現錯誤Unable to locate persistence unit
。我將persistence.xml
文件放在與我的jar文件位於同一文件夾的文件夾META-INF
中。我有以下persistence.xml file
。Maven無法找到持久單元
<?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="user-db">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.main.application.User</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.username" value="user" />
<property name="hibernate.connection.password" value="pwd" />
<property name="hibernate.connection.url" value="jdbc:mysql://127.0.0.1/users_db" />
</properties>
</persistence-unit>
</persistence>
堆棧跟蹤:
> Exception in thread "main" java.lang.reflect.InvocationTargetException > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:497) > at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58) > Caused by: javax.persistence.PersistenceException: Unable to locate > persistence units > at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:84) > at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:71) > at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:52) > at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48) > at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32) > at com.user.Dao.<init>(Dao.java:22) > at com.user.Dao.get(Dao.java:26) > at com.user.UserHandler.<init>(UserHandler.java:61) > at com.user.Main.main(Main.java:10) > ... 5 more Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: > -1 > at java.lang.String.substring(String.java:1967) > at org.hibernate.boot.archive.internal.ArchiveHelper.getJarURLFromURLEntry(ArchiveHelper.java:45) > at org.hibernate.jpa.boot.internal.PersistenceXmlParser.parsePersistenceXml(PersistenceXmlParser.java:105) > at org.hibernate.jpa.boot.internal.PersistenceXmlParser.doResolve(PersistenceXmlParser.java:84) > at org.hibernate.jpa.boot.internal.PersistenceXmlParser.locatePersistenceUnits(PersistenceXmlParser.java:66) > at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:80) > ... 13 more
發佈完整的錯誤跟蹤! –
@ localhost999更新了我的問題 – Chris
您能否提供有關您的應用程序包的更多詳細信息,以及您在何處部署?還要檢查它是否符合我答案中提供的規則。 –