Java 无法使用反射执行函数

我正在开发一个eclipse插件。在这个插件中，我使用反射在另一个项目（hibernate项目）中的类中执行一个函数 调用（myobj）

这是一个例外

java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
    at java.lang.reflect.Method.invoke(Method.java:599)
    at packagesearch.DummyExecution.execution(DummyExecution.java:154)
    at packagesearch.HelloWorldAction.run(HelloWorldAction.java:48)
    at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
    at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)
    at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:583)
    at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:500)
    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:1003)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
    at java.lang.reflect.Method.invoke(Method.java:599)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
Caused by: java.lang.NoClassDefFoundError: org.dom4j.DocumentException
    at java.lang.J9VMInternals.verifyImpl(Native Method)
    at java.lang.J9VMInternals.verify(J9VMInternals.java:72)
    at java.lang.J9VMInternals.initialize(J9VMInternals.java:134)
    at test.Example.demo1(Example.java:38)
    ... 36 more
Caused by: java.lang.ClassNotFoundException: org.dom4j.DocumentException
    at java.net.URLClassLoader.findClass(URLClassLoader.java:419)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:643)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:345)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
    ... 40 more

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确切的问题是什么。我已经使用loader加载了类。Help

它的意思就是它所说的，它找不到类

org.dom4j.DocumentException

。最有可能的是，您的类路径不正确。

它的意思正是它所说的，它找不到类

org.dom4j.DocumentException

。很可能是您的类路径不正确。

我想知道这是否与Hibernate使用代理对象表示持久实体有关。因此，本质上，如果您检查实体x的类类型，您可能会得到类似x_javassist_1334的结果，因为Hibernate包装您的对象以添加一些特定于持久性的功能。在继续之前，我会做一个简单的检查并打印出调用方法的对象的类名。

我想知道这是否与Hibernate使用代理对象表示持久实体有关。因此，本质上，如果您检查实体x的类类型，您可能会得到类似x_javassist_1334的结果，因为Hibernate包装您的对象以添加一些特定于持久性的功能。我会做一个简单的检查并打印出调用方法的对象的类名，然后再继续