Maven JavaFX資源ClassLoader InputStream null

我有以下問題。我在路徑爲src/resources的文件夾中有圖像。現在我想在JavaFX應用程序中使用它們。Maven JavaFX資源ClassLoader InputStream null

ClassLoader classLoader = getClass().getClassLoader(); 
InputStream markerInputStream = classLoader.getResourceAsStream("/img/marker.gif"); 
SurfaceImage surfaceImage = null; 
try { 
surfaceImage = new SurfaceImage(ImageIO.read(markerInputStream),sector); 
} catch (IOException e) 
{e.printStackTrace();}

這是堆棧跟蹤：

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: input == null! 
    at javax.imageio.ImageIO.read(ImageIO.java:1348) 
    at map.map.setMarkerPosition(main.java:184) 
    at map.map$1.mouseClicked(main.java:151) 
    at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270) 
    at java.awt.Component.processMouseEvent(Component.java:6538) 
    at java.awt.Component.processEvent(Component.java:6300) 
    at java.awt.Component.dispatchEventImpl(Component.java:4891) 
    at java.awt.Component.dispatchEvent(Component.java:4713) 
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) 
    at java.awt.EventQueue.access$500(EventQueue.java:97) 
    at java.awt.EventQueue$3.run(EventQueue.java:709) 
    at java.awt.EventQueue$3.run(EventQueue.java:703) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86) 
    at java.awt.EventQueue$4.run(EventQueue.java:731) 
    at java.awt.EventQueue$4.run(EventQueue.java:729) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) 
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) 
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) 
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) 
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) 
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

我不知道那裏的錯誤是我所測試過的路徑/resources/marker.png只有/marker.png

在pom.xml的這個模塊是接下來一個。

<artifactId>application</artifactId> 
     <build> 
      <plugins> 
       <plugin> 
        <groupId>org.apache.maven.plugins</groupId> 
        <artifactId>maven-assembly-plugin</artifactId> 
        <version>2.5.3</version> 
        <configuration> 
         <descriptorRefs> 
          <descriptorRef>jar-with-dependencies</descriptorRef> 
         </descriptorRefs> 
        </configuration> 
       </plugin> 
      </plugins> 
      <resources> 
       <resource> 
        <directory>src/main/java</directory> 
        <includes> 
         <include>**/*.fxml</include> 
        </includes> 
       </resource> 
      </resources> 
     </build> 
     <dependencies> 
      <dependency> 
<...> 
      </dependency> 
      <dependency> 
       <groupId>gov.nasa</groupId> 
       <artifactId>worldwind</artifactId> 
       <version>2.0.0-986</version> 
      </dependency> 
      <dependency> 
       <groupId>com.metsci.glimpse</groupId> 
       <artifactId>glimpse-extras-worldwind</artifactId> 
       <version>2.1.2</version> 
      </dependency> 
     </dependencies> 
    </project>

你能幫我嗎？

來源

2016-06-08 Jonas Wolff

打開JAR查看內容（即'jar tf your.jar | grep gif'）。你的GIF（或者是PNG，你的代碼使用'.gif'你的文本寫了'.png'）？它是否在你期望的道路上？可能你需要爲Maven程序集插件的'include'標籤添加'**/* .gif，**/*。png'嗎？ – haraldK

如果classLoader.getResourceAsStream（「/ img/marker.gif」）;返回null時，您必須確保資源位於您的類路徑中。

構建您的JAR或WAR並查找marker.gif。也許它不存在或者處於不同的路徑下。

來源

2016-06-08 09:33:45

確定那裏沒有圖片。也許這個pom.xml是錯誤的？ –

您shuld有這樣的事情： ' \t 的src /資源 * ' –

好，我改變了它。在罐子裏是圖片，但輸入流是空的。我將程序中的路徑更改爲/marker.gif，因爲圖片保存在jar的第一級 –

Maven JavaFX資源ClassLoader InputStream null

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