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?
答案 0 :(得分:2)
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
答案 1 :(得分: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);