我有一个 scenebuilder 文本没有出现在 scenebuilder 上

Question

所以这是我的 fxml 文件的文本代码：

我希望这个由 scenebuilder 打开，我已经设置了所有但它不起作用

每次我运行它时，要么他们要求我下载 javafx 但我做不到，要么就是不显示。

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.PasswordField?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.text.Font?>

<GridPane alignment="center" hgap="10" vgap="10" padding="25" xmlns="http://javafx.com/javafx/16" xmlns:fx="http://javafx.com/fxml/1" fx:controller="example.RegistrationFormController">
    <Label text="Create New Account" GridPane.columnSpan="2" GridPane.rowIndex="0">
        <font>
            <Font size="18" />
        </font>
    </Label>

    <Label text="Username:" GridPane.rowIndex="1" />
    <TextField fx:id="usernameTextField" GridPane.columnIndex="1" GridPane.rowIndex="1" />

    <Label text="Email Address:" GridPane.rowIndex="2" />
    <TextField fx:id="emailTextField" GridPane.columnIndex="1" GridPane.rowIndex="2" />

    <Label text="Password:" GridPane.rowIndex="3" />
    <PasswordField fx:id="passwordField" GridPane.columnIndex="1" GridPane.rowIndex="3" />

    <Label text="Confirm Password:" GridPane.rowIndex="4" />
    <PasswordField fx:id="confirmPasswordField" GridPane.columnIndex="1" GridPane.rowIndex="4" />

    <HBox spacing="10" alignment="center" GridPane.columnSpan="2" GridPane.rowIndex="5">
        <Button text="Create Account" onAction="#registerAccount" />
        <Button text="Cancel" onAction="#cancelRegistration" />
    </HBox>

    <Label fx:id="errorLabel" textFill="#1c2280" GridPane.columnSpan="2" GridPane.rowIndex="6">
        <padding>
            <Insets top="10" />
        </padding>
    </Label>
</GridPane>

Answer 1

如果您尝试打开此文件是 SceneBuilder 它将显示一个对话框：

单击“显示详细信息...”会提供一个堆栈跟踪，告诉您出了什么问题。

java.io.IOException: javafx.fxml.LoadException: 
/C:/Users/send2/sample.fxml:41

    at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.handleUnknownAndMissingCauses(FXOMLoader.java:119)
    at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.handleKnownCauses(FXOMLoader.java:126)
    at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.handleFxmlLoadingError(FXOMLoader.java:112)
    at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:106)
    at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.<init>(FXOMDocument.java:115)
    at com.oracle.javafx.scenebuilder.kit.editor.EditorController.updateFxomDocument(EditorController.java:2561)
    at com.oracle.javafx.scenebuilder.kit.editor.EditorController.setFxmlTextAndLocation(EditorController.java:764)
    at com.oracle.javafx.scenebuilder.app.DocumentWindowController.loadFromFile(DocumentWindowController.java:398)
    at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.performOpenFiles(SceneBuilderApp.java:675)
    at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.handleOpenFilesAction(SceneBuilderApp.java:514)
    at com.oracle.javafx.scenebuilder.app.welcomedialog.WelcomeDialogWindowController.handleOpen(WelcomeDialogWindowController.java:220)
    at com.oracle.javafx.scenebuilder.app.welcomedialog.WelcomeDialogWindowController.openDocument(WelcomeDialogWindowController.java:215)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
    at java.base/java.lang.reflect.Method.invoke(Unknown Source)
    at com.sun.javafx.reflect.Trampoline.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
    at java.base/java.lang.reflect.Method.invoke(Unknown Source)
    at javafx.base@18/com.sun.javafx.reflect.MethodUtil.invoke(Unknown Source)
    at javafx.fxml@18/com.sun.javafx.fxml.MethodHelper.invoke(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader$MethodHandler.invoke(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
    at javafx.base@18/javafx.event.Event.fireEvent(Unknown Source)
    at javafx.graphics@18/javafx.scene.Node.fireEvent(Unknown Source)
    at javafx.controls@18/javafx.scene.control.Button.fire(Unknown Source)
    at javafx.controls@18/com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(Unknown Source)
    at javafx.controls@18/com.sun.javafx.scene.control.inputmap.InputMap.handle(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
    at javafx.base@18/com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
    at javafx.base@18/javafx.event.Event.fireEvent(Unknown Source)
    at javafx.graphics@18/javafx.scene.Scene$MouseHandler.process(Unknown Source)
    at javafx.graphics@18/javafx.scene.Scene.processMouseEvent(Unknown Source)
    at javafx.graphics@18/javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
    at javafx.graphics@18/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
    at javafx.graphics@18/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
    at java.base/java.security.AccessController.doPrivileged(Unknown Source)
    at javafx.graphics@18/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(Unknown Source)
    at javafx.graphics@18/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(Unknown Source)
    at javafx.graphics@18/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
    at javafx.graphics@18/com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
    at javafx.graphics@18/com.sun.glass.ui.View.notifyMouse(Unknown Source)
    at javafx.graphics@18/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at javafx.graphics@18/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(Unknown Source)
    at java.base/java.lang.Thread.run(Unknown Source)
Caused by: javafx.fxml.LoadException: 
/C:/Users/send2/sample.fxml:41

    at javafx.fxml@18/javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader.load(Unknown Source)
    at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:104)
    ... 62 more
Caused by: java.lang.IllegalArgumentException: Unable to coerce 25 to class javafx.geometry.Insets.
    at javafx.fxml@18/com.sun.javafx.fxml.BeanAdapter.coerce(Unknown Source)
    at javafx.fxml@18/com.sun.javafx.fxml.BeanAdapter.put(Unknown Source)
    at javafx.fxml@18/com.sun.javafx.fxml.BeanAdapter.put(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader$Element.applyProperty(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader$Element.processValue(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader$Element.processPropertyAttribute(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader$Element.processInstancePropertyAttributes(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader$ValueElement.processEndElement(Unknown Source)
    at javafx.fxml@18/javafx.fxml.FXMLLoader.processEndElement(Unknown Source)
    ... 65 more

关键部分是：

java.io.IOException: javafx.fxml.LoadException:
/C:/Users/<username>/sample.fxml:41
. . .
Caused by: java.lang.IllegalArgumentException: Unable to coerce 25 to class javafx.geometry.Insets.

所以在 FXML 的第 41 行，解析器在指定 insets 时遇到了一个数字而不是 Insets 类型，因此无法解析文件并加载 SceneBuilder。 GridPane 是一个多行元素，直到第 41 行才会关闭，因此实际错误出现在 xml 标记开头的属性中，您有

padding="25"

.

在 FXML 的其他地方，使用标签，您已经以正确的方式指定了填充。要填充您的 GridPane，您需要类似的东西。

变化：

<GridPane alignment="center" hgap="10" vgap="10" padding="25" . . .

致：

<GridPane alignment="center" hgap="10" vgap="10" xmlns="http://javafx.com/javafx/16" xmlns:fx="http://javafx.com/fxml/1" fx:controller="example.RegistrationFormController">
  <padding>
    <Insets bottom="25.0" left="25.0" right="25.0" top="25.0" />
  </padding>
  . . . 
</GridPane>

在此之后，您的 FXML 在 SceneBuilder 中正常打开（在 JavaFX Scene Builder 18.0.0 中测试）。