从bin文件夹以外的文件夹加载fxml文件时出错

Question

我是一个相当新的java程序员.我只有大约五周的经验,从零开始,如果它们与控制器类不在同一个文件夹中,我在使用Scene Builder中创建的javafx fxml文件正确加载时遇到问题.

我在用

Win7x64 running jre7x86 for this build

Eclipse Juno Service Release 1
Build id: 20120920-0800

jre version 1.7.0_07

javaFx version 2.2.1-b03

SceneBuilder version 1.0-b50

我的场景加载器代码是

private static final String RESOURCE_PATH = "/resources/";
public static Stage buildStage(@SuppressWarnings("rawtypes") Class pClass,
         String stageTitle, String resourceLocation)
   {
      Stage temp = new Stage();
      Pane page = null;
      try
      {
         page = FXMLLoader.load(pClass.getResource(RESOURCE_PATH + resourceLocation), null,
               new JavaFXBuilderFactory());
      }
      catch (IOException e)
      {
         e.printStackTrace();
      }
      Scene scene = new Scene(page);
      temp.setScene(scene);
      temp.setTitle(stageTitle);
      temp.setResizable(false);
      return temp;
   }

我知道项目目录是/workspace/projectName/理论上的,如果给定一个相对路径,加载器应该能够找到文件吗？我得到的错误是

Exception in Application start method
Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:403)
    at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
    at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Location is required.
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2737)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2721)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2707)
    at outofunit.system.StageFactory.buildStage(StageFactory.java:32)
    at outofunit.desktop.ArcMaster.start(ArcMaster.java:28)
    at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
    at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:206)
    at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:173)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
    at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
    ... 1 more

我已经尝试给加载器一个绝对路径,但它只是不接受任何不直接在同一目录中的东西.我正在抓住稻草,试图解决这个问题.

我试图自己研究这个,但我没有得到太多,这里似乎相似的几个答案似乎没有帮助,或者我太密集和/或没有经验去理解它们.它们是JavaFX 2.0加载fxml文件,事件处理程序失败,JavaFX 2.0 FXML资源加载错误

我的一个伙伴能够通过使用此代码克服此问题

public void load(String pFileName, Stage pStage, String pTitle)
   {
      String fName = RESOURCE_PATH + pFileName;

      try
      {
         String externalForm = getClass().getResource(fName)
            .toExternalForm();

         InputStream inStream = new URL(externalForm).openStream();

         FXMLLoader loader = new FXMLLoader();
         Pane p = (Pane)loader.load(inStream);

         pStage.setTitle(pTitle);
         pStage.setScene(new Scene(p));

         mWindowControl = loader.getController();
         mWindowControl.setUp(pStage);

         pStage.show();
      }
      catch (Exception e)
      {
         e.printStackTrace();
      }
   }

我没有使用他的代码的最大区别和原因是因为我的根窗格是一个Anchor窗格而不是普通窗格,他的方式URL instream强制一个普通窗格.我没有使用普通窗格作为我的基础吗？我很乐意为你们提供任何帮助或意见.谢谢.

编辑:所以我一直在研究这个问题,错误信息已经改变.

我将代码更改为此

private final String RESOURCE_PATH = "resources/";
public void load(String pFileName, Stage pStage, String pTitle)
   {
      String fName = RESOURCE_PATH + pFileName;

      Pane page = null;

      FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource(fName));

      try
      {
         page = (Pane) fxmlLoader.load();
      }
      catch (IOException exception)
      {
         throw new RuntimeException(exception);
      }

      Scene scene = new Scene(page);
      pStage.setScene(scene);
      pStage.setTitle(pTitle);

      mWindowControl = fxmlLoader.getController();
      mWindowControl.setUp(pStage);

      pStage.show();
   }

但我现在得到的错误是

java.lang.IllegalStateException: Location is not set.
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2021)
    at outofunit.desktop.WindowLoader.load(WindowLoader.java:136)
    at outofunit.desktop.WindowLoader.load(WindowLoader.java:62)
    at outofunit.desktop.ArcMaster.start(ArcMaster.java:30)
    at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
    at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:206)
    at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:173)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
    at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
    at java.lang.Thread.run(Unknown Source)

我不明白该位置是如何设置的

Answer 1

这是一个路径问题,java需要知道从包层次结构中获取文件的位置.所以使用"/package1/resourcename.fxml"应该从树的根找​​到源.您通常"/"在开始时离开,因为您已经位于包树的顶部.