我有一个项目，我移动到maven，因为它使我可以轻松地处理依赖项，在我完成构建工作后，我的执行停止在从我的一个包加载资源(图像)时。Im丢失了，因为在没有 Maven 的旧版本上一切都运行良好。
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";
我的整个包结构是相同的，所有的名称都是。
我得到的异常(exception)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$149(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)
有问题的行是被剪掉的第一个代码。以前有人见过这个问题吗？当我放入 Maven 时，我是否必须更改我使用路径的方式？我对整个 Maven 来说几乎是个新手，所以如果你能帮助我，那就太好了，因为我希望它能顺利工作。
这是我的 pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.bisciak</groupId>
<artifactId>OpenChannel_Dynamic_Downloader_MavenEnabled</artifactId>
<version>0.1</version>
<packaging>jar</packaging>
<name>OpenChannel_Dynamic_Downloader_MavenEnabled</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<mainClass>openchannel_dynamic_downloader.application.OpenChannel_Dynamic_Downloader</mainClass>
</properties>
<organization>
<!-- Used as the 'Vendor' for JNLP generation -->
<name>Tomas Bisciak's software</name>
</organization>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<id>unpack-dependencies</id>
<phase>package</phase>
<goals>
<goal>unpack-dependencies</goal>
</goals>
<configuration>
<excludeScope>system</excludeScope>
<excludeGroupIds>junit,org.mockito,org.hamcrest</excludeGroupIds>
<outputDirectory>${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，并且自迁移以来代码未修改，这与 maven 相关吗？
包结构:
最佳答案
使用 Maven 时，所有资源都应放置在 src/main/resources 下。我所说的资源是指应该打包到最终 JAR 中的每个文件，即应该出现在类路径中的每个文件。
由于您使用 Class.getResourceAsStream() 访问图像，因此它们必须位于该文件夹下。
因此，您应该将资源移至 src/main/resources 下。图像的最终位置为:src/main/resources/openchannel_dynamic_downloader/resources/images/openChannelPlaceholderIcon.png
关于java - 为项目添加 Maven 支持搞乱了图像加载/使用路径，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33695800/