为项目添加maven支持搞砸了图像加载/使用路径

Question

我有一个项目，我移动到maven，因为它使我很容易使用依赖项，在我完成构建工作正常后，我的执行停止从我的一个软件包加载资源（图像）.Im因为在没有maven的旧​​版本中一切正常。

我加载图片

   primStage.getIcons().add(new Image(OpenChannel_Dynamic_Downloader.class
                                    .getResourceAsStream(Info.Resource.OCPI)));

此处指定资源位置

public static final String OCPI = "/openchannel_dynamic_downloader/resources/images/openChannelPlaceholderIcon.png";

我的整个包结构是一样的，所有的名字都是。

我得到的例外是：

Exception in thread "JavaFX Application Thread" java.lang.NullPointerException: Input stream must not be null
    at javafx.scene.image.Image.validateInputStream(Image.java:1110)
    at javafx.scene.image.Image.<init>(Image.java:694)
    at openchannel_dynamic_downloader.application.OpenChannel_Dynamic_Downloader.lambda$showLoginWindow$10(OpenChannel_Dynamic_Downloader.java:233)
    at com.sun.javafx.application.PlatformImpl.lambda$null$174(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$175(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$149(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:745)

有问题的行是第一个被剪切的代码。有没有人见过这个问题？当我放入maven时，我是否愿意改变我的路径？我几乎是整个maven的新手，所以如果你可以帮助我，我会很高兴，因为我希望这可以毫无问题地工作。

这是我的pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>com.bisciak</groupId>
    <artifactId>OpenChannel_Dynamic_Downloader_MavenEnabled</artifactId>
    <version>0.1</version>
    <packaging>jar</packaging>

    <name>OpenChannel_Dynamic_Downloader_MavenEnabled</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <mainClass>openchannel_dynamic_downloader.application.OpenChannel_Dynamic_Downloader</mainClass>
    </properties>

    <organization>
        <!-- Used as the 'Vendor' for JNLP generation -->
        <name>Tomas Bisciak's software</name>
    </organization>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.6</version>
                <executions>
                    <execution>
                        <id>unpack-dependencies</id>
                        <phase>package</phase>
                        <goals>
                            <goal>unpack-dependencies</goal>
                        </goals>
                        <configuration>
                            <excludeScope>system</excludeScope>
                            <excludeGroupIds>junit,org.mockito,org.hamcrest</excludeGroupIds>
                            <outputDirectory>${project.build.directory}/classes</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <executions>
                    <execution>
                        <id>unpack-dependencies</id>

                        <phase>package</phase>
                        <goals>
                            <goal>exec</goal>
                        </goals>
                        <configuration>
                            <executable>${java.home}/../bin/javafxpackager</executable>
                            <arguments>
                                <argument>-createjar</argument>
                                <argument>-nocss2bin</argument>
                                <argument>-appclass</argument>
                                <argument>${mainClass}</argument>
                                <argument>-srcdir</argument>
                                <argument>${project.build.directory}/classes</argument>
                                <argument>-outdir</argument>
                                <argument>${project.build.directory}</argument>
                                <argument>-outfile</argument>
                                <argument>${project.build.finalName}.jar</argument>
                            </arguments>
                        </configuration>
                    </execution>
                    <execution>
                        <id>default-cli</id>
                        <goals>
                            <goal>exec</goal>                            
                        </goals>
                        <configuration>
                            <executable>${java.home}/bin/java</executable>
                            <commandlineArgs>${runfx.args}</commandlineArgs>
                        </configuration>
                    </execution>
                </executions>  
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <compilerArguments>
                        <bootclasspath>${sun.boot.class.path}${path.separator}${java.home}/lib/jfxrt.jar</bootclasspath>
                    </compilerArguments>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.16</version>
                <configuration>
                    <additionalClasspathElements>
                        <additionalClasspathElement>${java.home}/lib/jfxrt.jar</additionalClasspathElement>
                    </additionalClasspathElements>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.controlsfx</groupId>
            <artifactId>controlsfx</artifactId>
            <version>8.40.10</version>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.190</version>
        </dependency>
        <dependency>
            <groupId>net.java.openjfx.backport</groupId>
            <artifactId>openjfx-78-backport</artifactId>
            <version>1.8.0-ea-b96.1</version>
        </dependency>
        <dependency>
            <groupId>commons-validator</groupId>
            <artifactId>commons-validator</artifactId>
            <version>1.4.1</version>
        </dependency>
        <dependency>
            <groupId>com.1stleg</groupId>
            <artifactId>jnativehook</artifactId>
            <version>2.0.2</version>
        </dependency>
    </dependencies>



</project>

图像正确位于指定的包/位置，并且自我迁移后代码未被修改，这与此maven有关吗？

包装结构：

Answer 1

使用Maven时，所有资源都应放在src/main/resources下。根据资源，我的意思是应该打包到最终JAR中的每个文件，即应该存在于类路径中的每个文件。

由于您使用Class.getResourceAsStream()来访问您的图片，因此它们必须位于该文件夹下。

因此，您应该在src/main/resources下移动资源。图像的最终位置为：src/main/resources/openchannel_dynamic_downloader/resources/images/openChannelPlaceholderIcon.png

Answer 2

我喜欢以这种方式使用 Maven 和 JavaFx 加载图片：
1）将图像放入src/main/resources/images/image.png 2）创建javafx.scene.image.Image对象：

ClassLoader classLoader = getClass().getClassLoader();
String imageUrl = classLoader.getResource("images/image.png").toExternalForm();
Image image = new Image(imageUrl);