Question

我搜索过，也许这个答案与我的问题Eclipse - "Run as Java Application" when maven is involved类似，但我仍然无法理解。

我的项目结构：

PackageTry
----的src /主/ JAVA
-------- UI
------------Init.java
----的src / main /资源
-------- CSS
------------ Init.css
--------图像
------------的icon.png

package ui;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;

public class Init extends Application{

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        Button button = new Button();
        button.setPrefSize(50, 50);
        button.setId("button");
        Group group = new Group();
        group.getChildren().add(button);
        Scene scene = new Scene(group,300,300);
         scene.getStylesheets().add(getClass().getResource("../main/resources/css/Init.css").toExternalForm());
        primaryStage.setScene(scene);
       primaryStage.show();
    }

}

当我选择运行as-＆gt; java应用程序时，它运行良好

但是当我运行maven包制作的jar时，它会显示出来（Init：23是scene.getStylesheets（）。add（getClass（）。getResource（“../ main / resources / css / Init.css”）。toExternalForm（））;）

Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767).   
    Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at ui.Init.start(Init.java:23)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$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)
Exception running application ui.Init

的pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>PackageTry</groupId>
<artifactId>PackageTry</artifactId>
<version>0.0.1-SNAPSHOT</version>

<build>
  <sourceDirectory>src</sourceDirectory>
  <resources>
    <resource>
      <directory>src</directory>
      <excludes>
        <exclude>**/*.java</exclude>
      </excludes>
    </resource>
  </resources>
  <plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.3</version>
<executions>
  <execution>
    <phase>package</phase>
    <goals>
      <goal>shade</goal>
    </goals>
    <configuration>
      <transformers>
        <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
          <mainClass>ui.Init</mainClass>
        </transformer>
      </transformers>
    </configuration>
  </execution>
</executions>
 </plugin>
</plugins>
</build>

</project>

我的问题：如何让jar运行正常。谢谢！

eclipse中的Maven Project可以作为java应用程序运行，但是jar文件无法正常运行

0 个答案: