我想用其他Controller Files中的一些参数加载新的FXML文件
我已经阅读了关于传递参数的下一个答案，但它们并没有帮助我。
- 通过参数-JavaFX的FXML
- JavaFX的从- -沟槽单例的控制器
下面是我努力从事件处理程序打开新的FXML视图，该处理程序易于传递参数。
请寻求帮助。
MainController.java
@FXML private void handleButtonAction(ActionEvent event) throws IOException { Context currentContext = new Context(); URL url = getClass().getResource("ManageTemplateChild.fxml"); FXMLLoader fxmlloader = new FXMLLoader(); fxmlloader.setLocation(url); fxmlloader.setBuilderFactory(new JavaFXBuilderFactory()); bordermanagetemp.getChildren().clear(); bordermanagetemp.getChildren().add((Node) fxmlloader.load(url.openStream())); ((ManageTemplateChildController) fxmlloader.getController()) .setContext(currentContext,Finalvaluetablerow); } ManageTemplateChildController.java
private Context context; public void setContext(Context context,Object Finalvaluetablerow) { this.context = context; o = Finalvaluetablerow; System.out.println("value of main" + Finalvaluetablerow + " value of child" + o); testlabel.setText((String) o); }
Context.java
public class Context { private final static Context instance = new Context(); public static Context getInstance() { return instance; } }
ManageTemplateChild.FXML
此代码正确打开新Pane但抛出下一个exception。 此外，未显示子窗格中的Label 。
NPE来自下一行：bordermanagetemp.getChildren（）。add（（Node）fxmlloader.load（url.openStream（）））;
堆栈跟踪：
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1440) at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170) at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53) at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:28) at javafx.event.Event.fireEvent(Event.java:171) at javafx.scene.Node.fireEvent(Node.java:6863) at javafx.scene.control.Button.fire(Button.java:179) at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:193) at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:336) at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:329) at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:64) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170) at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53) at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33) at javafx.event.Event.fireEvent(Event.java:171) at javafx.scene.Scene$MouseHandler.process(Scene.java:3324) at javafx.scene.Scene$MouseHandler.process(Scene.java:3164) at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3119) at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1559) at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2261) at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:228) at com.sun.glass.ui.View.handleMouseEvent(View.java:528) at com.sun.glass.ui.View.notifyMouse(View.java:922) at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method) at com.sun.glass.ui.gtk.GtkApplication$3$1.run(GtkApplication.java:82) at java.lang.Thread.run(Thread.java:722) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1435) ... 44 more Caused by: java.lang.RuntimeException: java.lang.IllegalAccessException: Class javafx.fxml.FXMLLoader$ValueElement can not access a member of class customercloudfx.ManageTemplateChildController with modifiers "" at javafx.fxml.FXMLLoader$ValueElement.processValue(FXMLLoader.java:661) at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:572) at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2314) at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2131) at customercloudfx.ManageTemplateController.handleButtonAction(ManageTemplateController.java:127) ... 49 more Caused by: java.lang.IllegalAccessException: Class javafx.fxml.FXMLLoader$ValueElement can not access a member of class customercloudfx.ManageTemplateChildController with modifiers "" at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:95) at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:261) at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:253) at java.lang.reflect.Field.doSecurityCheck(Field.java:983) at java.lang.reflect.Field.getFieldAccessor(Field.java:927) at java.lang.reflect.Field.set(Field.java:680) at javafx.fxml.FXMLLoader$ValueElement.processValue(FXMLLoader.java:659) ... 53 more
例外情况说FXMLLoader无法通过reflection访问您的ManageTemplateChildController类本身或其字段/方法。 让你的课程公开。 将@FXML注释添加到在FXML文件中定义为“fx：id”的私有字段，或者将这些字段公开，而不添加@FXML注释。
您提供的链接中包含所有内容。 对于那些对How to pass data between Controllers以及对问题的答案有疑问的人来说，这是最好的答案之一！
但是，在你的情况下，我建议在传递参数内使用Binding ！ 你可以在ChildController拥有一个id ，你可以将它绑定到MainController's id 。 这样id的值就会在控制器之间自动传递
您可以查看以下URL以便更好地理解，或者如果您可以显示，您如何在MainController中获取ID，可能我可以帮助您使用一些代码！
http://docs.oracle.com/javafx/2/binding/jfxpub-binding.htm
http://www.drdobbs.com/jvm/javafx-20-binding/231903245
编辑 – 从FXML加载控制器
@FXML private void handleButtonAction(ActionEvent event) throws IOException { //Instead of making a reference from the FXMLLoader, you are creating a new Object //ManageTemplateChildController m = new ManageTemplateChildController(); //try using FXMLLoader loader = new FXMLLoader(getClass().getResource("ManageTemplateChild.fxml")); ManageTemplateChildController controller = loader.getController(); //where loader is the FXMLLoader for you second FXML m.redirecthome(stage,Finalvaluetablerow); }