我将 jaybird 2.2.3 与 hibernate 3.5 一起使用，当我使用向导 hibernate 映射文件和 pojos 数据库时，出现以下错误
“java.lang.NullPointerException”
我对 mysql 使用相同的映射并且它工作正常，所以我相信它是 jaybird 中的东西
My hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.FirebirdDialect</property>
<property name="hibernate.connection.driver_class">org.firebirdsql.jdbc.FBDriver</property>
<property name="hibernate.connection.url">jdbc:firebirdsql://XXXXXX:XXXX/X:\XXXX\XXXX\XXX\XXX\XX\XXX.FDB</property>
<property name="hibernate.connection.username">sysdba</property>
<property name="hibernate.connection.password">XXXXX</property>
</session-factory>
</hibernate-configuration>
编辑:
INFO [org.hibernate.cfg.Configuration]: configuring from file: hibernate.cfg.xml
INFO [org.hibernate.cfg.Configuration]: Configured SessionFactory: null
INFO [org.hibernate.cfg.reveng.OverrideRepository]: Override file: C:\Documents and Settings\micro-40\workspace\testefirebird\src\java\hibernate.reveng.xml
INFO [org.netbeans.modules.hibernate.util.HibernateUtil]: Found pre-existing database connection.
INFO [org.netbeans.modules.hibernate.util.HibernateUtil]: Database Connection is pre-established. Returning the conneciton.
INFO [org.hibernate.connection.ConnectionProviderFactory]: Initializing connection provider: org.netbeans.modules.hibernate.util.CustomJDBCConnectionProvider
INFO [org.netbeans.modules.hibernate.util.CustomJDBCConnectionProvider]: Loaded JDBC driver
INFO [org.netbeans.modules.hibernate.util.CustomJDBCConnectionProvider]: Got connection.. returning
INFO [org.netbeans.modules.hibernate.wizards.HibernateCodeGenWizardDescriptor]: access to hibernate fails.
java.lang.NullPointerException
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:86)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2005)
at org.hibernate.cfg.JDBCMetaDataConfiguration.readFromJDBC(JDBCMetaDataConfiguration.java:40)
at org.netbeans.modules.hibernate.wizards.HibernateCodeGenWizardDescriptor.checkConfig(Hibernat eCodeGenWizardDescriptor.java:282)
[catch] at org.netbeans.modules.hibernate.wizards.HibernateCodeGenWizardDescriptor.isValid(HibernateCod eGenWizardDescriptor.java:177)
at org.openide.WizardDescriptor.updateStateOpen(WizardDescriptor.java:872)
at org.openide.WizardDescriptor.updateState(WizardDescriptor.java:820)
at org.openide.loaders.TemplateWizard.updateState(TemplateWizard.java:754)
at org.netbeans.modules.project.ui.NewFileWizard.updateState(NewFileWizard.java:124)
at org.openide.WizardDescriptor._updateState(WizardDescriptor.java:798)
at org.openide.WizardDescriptor.access$200(WizardDescriptor.java:90)
at org.openide.WizardDescriptor$Listener.stateChanged(WizardDescriptor.java:2094)
at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:329)
at org.openide.loaders.TemplateWizardIterImpl.run(TemplateWizardIterImpl.java:275)
at org.openide.util.Mutex.doEvent(Mutex.java:1343)
at org.openide.util.Mutex.writeAccess(Mutex.java:457)
at org.openide.loaders.TemplateWizardIterImpl.fireStateChanged(TemplateWizardIterImpl.java:261)
at org.openide.loaders.TemplateWizardIterImpl.setIterator(TemplateWizardIterImpl.java:120)
at org.openide.loaders.TemplateWizardIteratorWrapper.setIterator(TemplateWizardIteratorWrapper. java:79)
at org.openide.loaders.TemplateWizard.setTemplateImpl(TemplateWizard.java:209)
at org.openide.loaders.TemplateWizard$1.run(TemplateWizard.java:231)
at org.openide.loaders.TemplateWizard$1.run(TemplateWizard.java:228)
at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
at org.openide.util.Mutex.readAccess(Mutex.java:273)
at org.openide.loaders.TemplateWizard.setTemplate(TemplateWizard.java:228)
at org.netbeans.modules.project.ui.TemplateChooserPanel.storeSettings(TemplateChooserPanel.java :168)
at org.netbeans.modules.project.ui.TemplateChooserPanel.storeSettings(TemplateChooserPanel.java :71)
at org.openide.WizardDescriptor.storeSettingsAndNotify(WizardDescriptor.java:1379)
at org.openide.WizardDescriptor.access$1700(WizardDescriptor.java:90)
at org.openide.WizardDescriptor$Listener$1.run(WizardDescriptor.java:2117)
at org.openide.WizardDescriptor.lazyValidate(WizardDescriptor.java:1502)
at org.openide.WizardDescriptor.access$1900(WizardDescriptor.java:90)
at org.openide.WizardDescriptor$Listener.actionPerformed(WizardDescriptor.java:2141)
at sun.reflect.GeneratedMethodAccessor182.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:457)
at com.sun.proxy.$Proxy57.actionPerformed(Unknown Source)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:729)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:688)
at java.awt.EventQueue$3.run(EventQueue.java:686)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:702)
at java.awt.EventQueue$4.run(EventQueue.java:700)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:699)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:154)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219)
at java.awt.Dialog.show(Dialog.java:1082)
at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:1076)
at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1126)
at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1098)
at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:128)
at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
at org.openide.util.Mutex.readAccess(Mutex.java:273)
at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:1083)
at java.awt.Component.show(Component.java:1651)
at java.awt.Component.setVisible(Component.java:1603)
at java.awt.Window.setVisible(Window.java:1014)
at java.awt.Dialog.setVisible(Dialog.java:1005)
at org.netbeans.core.windows.services.DialogDisplayerImpl$1AWTQuery.showDialog(DialogDisplayerI mpl.java:260)
at org.netbeans.core.windows.services.DialogDisplayerImpl$1AWTQuery.run(DialogDisplayerImpl.jav a:186)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:688)
at java.awt.EventQueue$3.run(EventQueue.java:686)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
有人能帮我吗？
最佳答案
在深入研究 Netbeans 的代码并向 Jaybird 添加额外日志记录后，问题在于 Netbeans 使用自定义类加载器加载驱动程序，该类加载器不会在 META-INF/services 中返回资源(特别是对于 Jaybird 2.2.x: META-INF/services/org.firebirdsql.gds.impl.GDSFactoryPlugin )。
这会破坏驱动程序，因为这些服务定义用于加载可用的 GDSFactoryPlugin 定义(例如，Type 4 默认实现、Type 4 Open Office 实现、Type 2 嵌入式客户端和 Type 2 native 客户端的定义)。
我将添加某种回退机制或将此插件定义移动到一个单独的位置，并调查 Netbeans 这样做的原因，因为它对我来说没有多大意义。
解决方案
使用 Jaybird 2.2.4 或更高版本。
解决方法
注意 :不要使用此解决方法，它已被 Jaybird 2.2.4 的发布所取代
作为一种解决方法，我发布了 Jaybird 2.2.4 的快照版本，您可以从 http://sourceforge.net/projects/firebird/files/firebird-jca-jdbc-driver/2.2.4-SNAPSHOT/ 下载它(确保它以今天(9 月 21 日)作为构建日期，可能某些 sourceforge 镜像仍然分发以前的版本)快照)。
可以在 Jaybird 跟踪器中找到 2.2.4 中的完整更改列表: Version 2.2.4 。