问为什么我得到javafx.fxml.LoadException甚至fxml文件的路径都是正确的？
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Stack Overflow用户

提问于 2018-08-13 04:34:15

回答 2查看 0关注 0票数 0

我得到

javafx.fxml.LoadException：

当我使用下面的代码加载和fxml文件时

AnchorPane anchorPane = (AnchorPane)loader.load()

这是我的fxml文件，不包括import语句

<AnchorPane prefHeight="537.0" prefWidth="374.0"     xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.buddhikajay.controller.NewTransactionDialogController">
   <children>
      <GridPane hgap="5.0" layoutX="30.0" layoutY="10.0" prefHeight="544.0" prefWidth="314.0" vgap="5.0">
    <columnConstraints>
      <ColumnConstraints hgrow="SOMETIMES" maxWidth="142.0" minWidth="10.0" prefWidth="69.0" />
      <ColumnConstraints hgrow="SOMETIMES" maxWidth="226.0" minWidth="10.0" prefWidth="225.0" />
    </columnConstraints>
    <rowConstraints>
      <RowConstraints maxHeight="70.0" minHeight="10.0" prefHeight="33.0" vgrow="SOMETIMES" />
      <RowConstraints maxHeight="105.0" minHeight="10.0" prefHeight="38.0" vgrow="SOMETIMES" />
      <RowConstraints maxHeight="156.0" minHeight="10.0" prefHeight="51.0" vgrow="SOMETIMES" />
        <RowConstraints maxHeight="154.0" minHeight="10.0" prefHeight="43.0" vgrow="SOMETIMES" />
        <RowConstraints maxHeight="160.0" minHeight="10.0" prefHeight="43.0" vgrow="SOMETIMES" />
        <RowConstraints maxHeight="161.0" minHeight="10.0" prefHeight="63.0" vgrow="SOMETIMES" />
        <RowConstraints maxHeight="301.0" minHeight="10.0" prefHeight="180.0" vgrow="SOMETIMES" />
        <RowConstraints maxHeight="231.0" minHeight="10.0" prefHeight="106.0" vgrow="SOMETIMES" />
    </rowConstraints>
     <padding>
        <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
     </padding>
     <children>
        <Label text="ID" />
        <Label text="Date" GridPane.rowIndex="1" />
        <Label text="Amont" GridPane.rowIndex="2" />
        <Label text="Person" GridPane.rowIndex="4" />
        <Label text="Type" GridPane.rowIndex="3" />
        <Label text="Resolved" GridPane.rowIndex="5" />
        <Label />
        <Label text="Description" GridPane.rowIndex="6" />
        <TextField fx:id="idTextField" GridPane.columnIndex="1" />
        <TextField fx:id="dateTextField" GridPane.columnIndex="1" GridPane.rowIndex="1" />
        <TextField fx:id="amountTextField" GridPane.columnIndex="1" GridPane.rowIndex="2" />
        <TextArea fx:id="descriptionTextArea" prefHeight="200.0" prefWidth="200.0" GridPane.columnIndex="1" GridPane.rowIndex="6" />
        <HBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="50.0" prefWidth="225.0" spacing="20.0" GridPane.columnIndex="1" GridPane.rowIndex="7">
           <GridPane.margin>
              <Insets />
           </GridPane.margin>
           <padding>
              <Insets bottom="10.0" left="20.0" right="10.0" top="10.0" />
           </padding>
           <children>
              <Button fx:id="okButton" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" mnemonicParsing="false" onAction="#okActionFired" prefHeight="25.0" prefWidth="75.0" text="Ok" />
              <Button fx:id="cancleButton" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" mnemonicParsing="false" onAction="#cancleActionFired" prefHeight="25.0" prefWidth="75.0" text="Cancle" />
           </children>
        </HBox>
        <ComboBox fx:id="typeComboBox" prefWidth="150.0" GridPane.columnIndex="1" GridPane.rowIndex="3" />
        <ComboBox fx:id="personComboBox" prefWidth="150.0" GridPane.columnIndex="1" GridPane.rowIndex="4" />
        <ComboBox fx:id="resolvedComboBox" prefWidth="150.0" GridPane.columnIndex="1" GridPane.rowIndex="5" />
     </children>
  </GridPane>
  </children>
</AnchorPane>

以下是完整的错误堆栈

javafx.fxml.LoadException: 
/C:/Users/Buddhika/Documents/Programming/IdeaProjects/VirtualCreditDesktop/out/production/VirtualCreditDesktop/com/buddhikajay/view/NewTransactionDialog.fxml:9

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2595)
    at javafx.fxml.FXMLLoader.access$700(FXMLLoader.java:104)
    at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:928)
    at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:967)
    at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:216)
    at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:740)
    at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2701)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2521)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2435)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2403)
    at com.buddhikajay.controller.NewTransactionDialogController.showNewTransactionDialog(NewTransactionDialogController.java:68)
    at com.buddhikajay.controller.MainApp.start(MainApp.java:51)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153(LauncherImpl.java:821)
    at com.sun.javafx.application.LauncherImpl$$Lambda$50/1976027283.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(PlatformImpl.java:323)
    at com.sun.javafx.application.PlatformImpl$$Lambda$46/301541210.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$null$164(PlatformImpl.java:292)
    at com.sun.javafx.application.PlatformImpl$$Lambda$48/474926796.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(PlatformImpl.java:291)
    at com.sun.javafx.application.PlatformImpl$$Lambda$47/1662429848.run(Unknown Source)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$141(WinApplication.java:102)
    at com.sun.glass.ui.win.WinApplication$$Lambda$38/519284171.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.InstantiationException: com.buddhikajay.controller.NewTransactionDialogController
    at java.lang.Class.newInstance(Class.java:423)
    at sun.reflect.misc.ReflectUtil.newInstance(ReflectUtil.java:51)
    at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:923)
    ... 23 more
Caused by: java.lang.NoSuchMethodException: com.buddhikajay.controller.NewTransactionDialogController.<init>()
    at java.lang.Class.getConstructor0(Class.java:3074)
    at java.lang.Class.newInstance(Class.java:408)
    ... 25 more

回答 2

Stack Overflow用户

发布于 2018-08-13 12:40:37

堆栈跟踪中描述了这个问题：

Caused by: java.lang.NoSuchMethodException: com.buddhikajay.controller.NewTransactionDialogController.()

如果确实需要向控制器的构造函数传递参数，可以用Java代码创建控制器并将其传递给FXMLLoader：

NewTransactionDialogController controller = new NewTransactionDialogController(someValue);
FXMLLoader loader = new FXMLLoader();
loader.setLocation(...);
loader.setController(controller);
AnchorPane anchorPane = loader.load();

(使用此代码，必移除fx:controller)属性。)

或者，设置控制器：

FXMLLoader loader = new FXMLLoader();
loader.setLocation(...);
loader.setControllerFactory(clazz -> {
    if (clazz == NewTransactionDialogController.class) {
        return new NewTransactionDialogController(someValue);
    } else {
        // default behavior:
        try {
            return clazz.newInstance();
        } catch (Exception exc) {
            throw new RuntimeException(exc);
        }
    }
});

AnchorPane anchorPane = loader.load();

票数 0

Stack Overflow用户

发布于 2018-08-13 13:59:22

用以下代码试试：

控制器，SimpleController.java：

  package ex.view.views;

  import java.net.URL;
  import java.util.ResourceBundle;
  import javafx.event.ActionEvent;
  import javafx.fxml.FXML;
  import javafx.fxml.Initializable;
  import javafx.scene.control.Label;

  public class SimpleController implements Initializable {

      @FXML
      private Label label;

      @FXML
      private void handleButtonAction(ActionEvent event) {
          System.out.println("You clicked me!");
          label.setText("Hello World!");
      }

      @Override
      public void initialize(URL url, ResourceBundle rb) {
          // TODO
      }    
  }

simple.fxml：

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

  <?import javafx.scene.control.Button?>
  <?import javafx.scene.control.Label?>
  <?import javafx.scene.layout.AnchorPane?>

  <AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" 
              xmlns="http://javafx.com/javafx/8.0.65" 
              xmlns:fx="http://javafx.com/fxml/1"
               fx:controller="ex.view.views.SimpleController">
      <children>
          <Button fx:id="button" layoutX="126" layoutY="90" text="Click Me!" />
          <Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
      </children>
  </AnchorPane>

Scene.fxml：

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

  <?import java.lang.*?>
  <?import java.util.*?>
  <?import javafx.scene.*?>
  <?import javafx.scene.control.*?>
  <?import javafx.scene.layout.*?>

  <AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" 
              xmlns:fx="http://javafx.com/fxml" 
              fx:controller="ex.view.views.SimpleController">
      <children>
          <Button layoutX="126" layoutY="90" text="Click Me!" onAction="#handleButtonAction" fx:id="button" />
          <Label layoutX="126" layoutY="120" minHeight="16" minWidth="69" fx:id="label" />
      </children>
  </AnchorPane>

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/-100002095

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问为什么我得到javafx.fxml.LoadException甚至fxml文件的路径都是正确的？
EN