报错如下：

 

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java.io.IOException: javafx.fxml.LoadException:

/C:/User.................test.fxml

at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:92)

at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.<init>(FXOMDocument.java:80)

at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.<init>(FXOMDocument.java:95)

at com.oracle.javafx.scenebuilder.kit.editor.EditorController.updateFxomDocument(EditorController.java:2370)

at com.oracle.javafx.scenebuilder.kit.editor.EditorController.setFxmlTextAndLocation(EditorController.java:655)

at com.oracle.javafx.scenebuilder.app.DocumentWindowController.loadFromFile(DocumentWindowController.java:386)

at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.performOpenFiles(SceneBuilderApp.java:579)

at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.handleOpenFilesAction(SceneBuilderApp.java:447)

at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.handleLaunch(SceneBuilderApp.java:427)

at com.oracle.javafx.scenebuilder.app.AppPlatform.requestStartGeneric(AppPlatform.java:139)

at com.oracle.javafx.scenebuilder.app.AppPlatform.requestStart(AppPlatform.java:106)

at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.start(SceneBuilderApp.java:371)

at com.sun.javafx.application.LauncherImpl$8.run(LauncherImpl.java:837)

at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:335)

at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:301)

at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:298)

at java.security.AccessController.doPrivileged(Native Method)

at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:298)

at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)

at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)

at com.sun.glass.ui.win.WinApplication.access$300(WinApplication.java:39)

at com.sun.glass.ui.win.WinApplication$4$1.run(WinApplication.java:112)

at java.lang.Thread.run(Thread.java:744)

Caused by: javafx.fxml.LoadException:

/C:/User.................test.fxml

at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2617)

at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2864)

at javafx.fxml.FXMLLoader.processImport(FXMLLoader.java:2708)

at javafx.fxml.FXMLLoader.processProcessingInstruction(FXMLLoader.java:2677)

at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2517)

at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2425)

at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:89)

... 22 more

Caused by: java.lang.ClassNotFoundException: de...................（第三方的包文件）

at java.lang.ClassLoader.findClass(ClassLoader.java:530)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

at javafx.fxml.FXMLLoader.loadTypeForPackage(FXMLLoader.java:2932)

at javafx.fxml.FXMLLoader.loadType(FXMLLoader.java:2921)

at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2862)

... 27 more

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把第三方jar包放进JavaFX Scene Builder 2.0安装目录下如图，在package.cfg文件中app.classpath=行添加第三方的jar包