Hibernate 异常（Unable to configure EntityManagerFactory），请高手帮忙谢谢

Question

javax.persistence.PersistenceException: Unable to configure EntityManagerFactory        at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:
378)
        at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(Hib
ernatePersistence.java:56)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.
java:48)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.
java:32)
        at com.renesola.barcode.service.dao.sqlserver.DaoPublic.getEntityManager
(DaoPublic.java:37)
        at com.renesola.barcode.service.dao.sqlserver.DaoPublic.getAll(DaoPublic
.java:139)
        at com.renesola.barcode.service.dao.sqlserver.SqlServeWaferUserLoginDAO.
getUserMessage(SqlServeWaferUserLoginDAO.java:25)
        at com.renesola.barcode.business.WaferManage.getUserMessage(WaferManage.
java:521)
        at com.renesola.barcode.ui.UserLongin.getUserboolen(UserLongin.java:253)        at com.renesola.barcode.ui.UserLongin$3.actionPerformed(UserLongin.java:
152)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:19
95)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242
)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6041)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5806)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4413)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322
)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2440)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range:
 -1
        at java.lang.String.substring(String.java:1938)
        at org.hibernate.ejb.packaging.JarVisitorFactory.getJarURLFromURLEntry(J
arVisitorFactory.java:55)
        at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:
344)
        ... 34 more
javax.persistence.PersistenceException: Unable to configure EntityManagerFactoryDaoPublic :(getAll) java.lang.NullPointerException

Answer 1

楼主该结贴了，要不就真的没人给你回答了！你看看你的实体类是否实现了Serializable接口：implements Serializable，并且添加了默认构造和含有参数的构造，或者是否进行了getter/setter方法。

Answer 2

是Id问题，Entity必须定义一个Id。
顺便鄙视一下楼主，自己解决了也不说，害得我搞了好几个小时才发现是什么问题，去死吧，骂了隔壁！