通过JNLP运行FXML JavaFX应用程序java.lang.NullPointerException：需要位置

Question

解决办法是：

1. 使用路径/somefxml.fxml。
2. 使用FXMLLoader.Load（getClass（）.GetClassLoader（）.GetResource（“SomeFXml.fxml”））；
3. 使用FXMLLoader.Load（getClass（）.GetClassLoader（）.GetResource（“packageName/somefxml.fxml”））；
4. 检查文件是否存在。
5. 在罐子上签名。

我可能都试过了。

java.lang.NullPointerException: Location is required.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at xy.XY.start(XY.java:36)
at com.sun.javafx.applet.FXApplet2$2.run(FXApplet2.java:134)
at com.sun.javafx.application.PlatformImpl.lambda$null$173    (PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
Exception in thread "JavaFX Application Thread"     java.lang.RuntimeException: java.lang.NullPointerException: Location is required.
at com.sun.javafx.applet.FXApplet2$2.run(FXApplet2.java:150)
at com.sun.javafx.application.PlatformImpl.lambda$null$173    (PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Location is required.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at xy.XY.start(XY.java:36)
at com.sun.javafx.applet.FXApplet2$2.run(FXApplet2.java:134)
... 7 more

package testfxmlpackage;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class TestFXMLPackage extends Application {

  @Override
  public void start(Stage stage) throws Exception {
    Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));

    Scene scene = new Scene(root);

    stage.setScene(scene);
    stage.show();
  }
  public static void main(String[] args) {
    launch(args);
  }  
}

package testfxmlpackage;

import javafx.fxml.FXML;
import javafx.scene.text.TextFlow;

public class FXMLDocumentController {

   @FXML TextFlow xy;

}

<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.TextFlow?>

<AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" xmlns:fx="http://javafx.com/fxml/1" fx:controller="testfxmlpackage.FXMLDocumentController">
    <children>
        <TextFlow fx:id="xy" layoutX="22.0" layoutY="234.0" prefHeight="74.0" prefWidth="433.0" style="-fx-border-color: ADD8E6;" AnchorPane.bottomAnchor="14.0" AnchorPane.leftAnchor="22.0" AnchorPane.rightAnchor="142.0" />               
    </children>
</AnchorPane>

Answer 1

我没有试过，但是看了一下源代码，我认为活动的SecurityManager可能是问题的原因。

可能的解决办法：

• 尝试通过在JNLP文件中指定security元素来禁用SecurityManager（如果这完全禁用SecurityManager，则不是100%)

或

null

<dependency>
    <groupId>org.drombler.commons</groupId>
    <artifactId>drombler-commons-fx-core</artifactId>
    <version>0.7</version>
</dependency>