Orm org.hibernate.MappingException:未找到实体类（使用限定类名无效）

我正在尝试运行一个简单的“从表中选择”（我也尝试过从package.Class中选择）查询，但我一直遇到以下错误：

 org.hibernate.MappingException: entity class not found: demo.Agents
    at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:125)
    at org.hibernate.tuple.PropertyFactory.getGetter(PropertyFactory.java:191)
    at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:67)
    at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:136)
    at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:475)
    at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133)
    at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
    at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:297)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1385)
    at org.hibernate.console.ConsoleConfiguration$5.execute(ConsoleConfiguration.java:278)
    at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:63)
    at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:107)
    at org.hibernate.console.ConsoleConfiguration.buildSessionFactory(ConsoleConfiguration.java:273)
    at org.hibernate.eclipse.console.actions.ExecuteQueryAction.execute(ExecuteQueryAction.java:82)
    at org.hibernate.eclipse.console.actions.ExecuteQueryAction.run(ExecuteQueryAction.java:56)
    at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
    at org.hibernate.eclipse.console.actions.ExecuteQueryAction.runWithEvent(ExecuteQueryAction.java:60)
    at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
    at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
    at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:452)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
Caused by: java.lang.ClassNotFoundException: demo.Agents
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:513)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
    at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:169)
    at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
    at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:122)
    ... 43 more

k4

---

您忘记在主配置文件中声明映射文件：

...

---

我在这里重复我的评论：实体应该用单数形式命名：

Agent

，

Client

。调整自动生成（请参见），或者在以后重构生成的代码，因为所有应用程序代码都将基于这些名称，并且调用

代理

和

代理

确实很糟糕。代码会让人感到困惑和难以理解。无论如何，实体是应用程序的核心，应该包含除setter和getter之外的其他方法。所以启动自动生成是可以的，但以后应该忘记。

看起来我解决了它：
1） 我不需要修改我原来的hibernatecfg.xml。显然，我在控制台配置中定义的映射与我在项目文件夹中拥有的hbm.xml文件（它们的名称略有不同）之间不一致。
如果您使用ant从hbmxml文件构建POJO（如果我记得这里有双重导入错误），那么阅读本文的人不应该添加

标记 并搜索副本）。始终记住重建和刷新控制台配置和项目
2） demo.Agents中的select id，ssn查询有效，但select id，ssn FROM Agents不起作用……这是不是很奇怪？
3） 记得在执行之前保存查询；否则，它将执行较旧的查询
4） 如果我的回答有帮助，请留下一条评论：D，即使在我发布它10年后它对你有帮助。我将检查：D
5） 感谢Nizet的建议

---

6） 我还遗漏了什么？

并检查.hbm.xml文件，该类名完全符合表名。 例如：

。。

在您的

xxx.hbm.xml

中，在hibernate映射元素中使用限定类名：

package\u name.xxx

。这是针对POJO的jboss规范。

请显示您的hibernate-cfg.xml文件。你应该真正命名你的实体

Agent

和

Client

，而不是

Agent

和

Clients

。它们是自动生成的，我的表在plurallink（607）stackoverflow的反垃圾邮件机制完全是垃圾，但如果我这样做，这不是一样的吗。。。无论如何，我会试试你的建议。我也试着回答你的第二个问题：HQL希望找到类名（完全限定或不完全限定），而不是表名。它适用于实体，而不是表。所以它应该被选中。。。来自代理（大写A）。

org.hibernate.MappingNotFoundException: resource: demo/Clients.hbm.xml not found
at org.hibernate.cfg.Configuration.addResource(Configuration.java:665)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1679)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1647)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1626)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1600)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1554)
at org.hibernate.console.ConfigurationFactory.loadConfigurationXML(ConfigurationFactory.java:351)
at org.hibernate.console.ConfigurationFactory.configureStandardConfiguration(ConfigurationFactory.java:279)
at org.hibernate.console.ConfigurationFactory.buildConfiguration(ConfigurationFactory.java:184)
at org.hibernate.console.ConfigurationFactory.createConfiguration(ConfigurationFactory.java:96)
at org.hibernate.console.ConsoleConfiguration$3.execute(ConsoleConfiguration.java:240)
at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:63)
at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:107)
at org.hibernate.console.ConsoleConfiguration.buildWith(ConsoleConfiguration.java:237)
at org.hibernate.console.ConsoleConfiguration.build(ConsoleConfiguration.java:188)
at org.hibernate.eclipse.console.workbench.ConsoleConfigurationWorkbenchAdapter.getChildren(ConsoleConfigurationWorkbenchAdapter.java:42)
at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.getChildren(BasicWorkbenchAdapter.java:100)
at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.fetchDeferredChildren(BasicWorkbenchAdapter.java:106)
at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:235)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)  

  org.hibernate.console.HibernateConsoleRuntimeException: Could not compute classpath
    at org.hibernate.eclipse.console.EclipseLaunchConsoleConfigurationPreferences.getCustomClassPathURLS(EclipseLaunchConsoleConfigurationPreferences.java:103)
    at org.hibernate.eclipse.console.utils.ProjectUtils.findJavaProjects(ProjectUtils.java:302)
    at org.hibernate.eclipse.console.workbench.ProjectCompilerVersionChecker.validateProjectComplianceLevel(ProjectCompilerVersionChecker.java:35)
    at org.hibernate.eclipse.console.workbench.ConsoleConfigurationWorkbenchAdapter.getChildren(ConsoleConfigurationWorkbenchAdapter.java:37)
    at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.getChildren(BasicWorkbenchAdapter.java:100)
    at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.fetchDeferredChildren(BasicWorkbenchAdapter.java:106)
    at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:235)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: org.eclipse.core.runtime.CoreException: Unable to restore classpath entry.
    at org.eclipse.jdt.launching.JavaRuntime.abort(JavaRuntime.java:1376)
    at org.eclipse.jdt.launching.JavaRuntime.abort(JavaRuntime.java:1361)
    at org.eclipse.jdt.launching.JavaRuntime.newRuntimeClasspathEntry(JavaRuntime.java:731)
    at org.eclipse.jdt.launching.StandardClasspathProvider.recoverRuntimePath(StandardClasspathProvider.java:100)
    at org.eclipse.jdt.launching.StandardClasspathProvider.computeUnresolvedClasspath(StandardClasspathProvider.java:65)
    at org.eclipse.jdt.launching.JavaRuntime.computeUnresolvedRuntimeClasspath(JavaRuntime.java:1215)
    at org.hibernate.eclipse.console.utils.ClassLoaderHelper.getClasspath(ClassLoaderHelper.java:146)
    at org.hibernate.eclipse.console.EclipseLaunchConsoleConfigurationPreferences.getCustomClassPathURLS(EclipseLaunchConsoleConfigurationPreferences.java:94)
    ... 7 more
Caused by: org.xml.sax.SAXException: FWK005 parse may not be called while parsing.
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:263)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
    at org.eclipse.jdt.launching.JavaRuntime.newRuntimeClasspathEntry(JavaRuntime.java:708)
    ... 12 more

<class name="com.test.Emp" table="Emp">.. </class>