我正在使用 hibernate 3.5 & JPA 2.0 构建一个桌面应用程序。
我有2个罐子,
定义每个实体和 DAO 的 lib 包看起来像这样:
org.my.package.models
org.my.package.models.dao
org.my.package.models.utils
在 org.my.package.utils 中,我定义了用于获取 EM 和 EMF 实例的 hibernate 实用程序类,这意味着该库绑定到一个持久性单元名称,但现在这不是问题(无论如何你可以向我推荐一种更好的管理方式那)
第二个罐子的构建如下:
org.my.package.app
META-INF 是在项目的根目录上定义的,这意味着在我的 jar 中我可以直接在根目录中找到这个目录:
META-INF/
META-INF/persistence.xml
org/
org/my/
...
org/my/package/app/Main.class
当我运行该应用程序时,hibernate 无法找到 persistence.xml 它会引发异常,例如“找不到 PersistenceUnitName 的包或类”。
SLF4J: The requested version 1.5.11 by your slf4j binding is not compatible with [1.5.5, 1.5.6, 1.5.7, 1.5.8]
SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details.
3 [main] INFO org.hibernate.cfg.annotations.Version - Hibernate Annotations 3.5.0-Final
25 [main] INFO org.hibernate.cfg.Environment - Hibernate 3.5.0-Final
28 [main] INFO org.hibernate.cfg.Environment - hibernate.properties not found
33 [main] INFO org.hibernate.cfg.Environment - Bytecode provider name : javassist
41 [main] INFO org.hibernate.cfg.Environment - using JDK 1.4 java.sql.Timestamp handling
153 [main] INFO org.hibernate.annotations.common.Version - Hibernate Commons Annotations 3.2.0.Final
160 [main] INFO org.hibernate.ejb.Version - Hibernate EntityManager 3.5.0-Final
Exception in thread "main" java.lang.ExceptionInInitializerError
at Main.main(Main.java:171)
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: PMMPU] class or package not found
at org.hibernate.ejb.Ejb3Configuration.addNamedAnnotatedClasses(Ejb3Configuration.java:1316)
at org.hibernate.ejb.Ejb3Configuration.addClassesToSessionFactory(Ejb3Configuration.java:1094)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:981)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:275)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:359)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
at dil.tal.polymarmots.utils.HibernateUtil.getEmf(HibernateUtil.java:45)
at dil.tal.polymarmots.utils.HibernateUtil.getEm(HibernateUtil.java:54)
at dil.tal.polymarmots.utils.HibernateUtil.getMotDAOImpl(HibernateUtil.java:115)
at dil.tal.polymarmots.models.Mot.<clinit>(Mot.java:30)
... 1 more
Caused by: java.lang.ClassNotFoundException: model.Extrait
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:170)
at org.hibernate.ejb.Ejb3Configuration.classForName(Ejb3Configuration.java:1232)
at org.hibernate.ejb.Ejb3Configuration.addNamedAnnotatedClasses(Ejb3Configuration.java:1304)
... 11 more
我用谷歌搜索了一些关于这个问题的信息,但我无法正确组织源代码。
有什么帮助吗?