在jar包中定位资源 [英] Locating resources within a jar package
问题描述
我有一个静态类,在类中,图像被加载到BufferedImage对象中,如下所示:
I have a static class and inside that class images are loaded into BufferedImage objects like so:
File groundTopImageFile = new File("src/main/resources/ground - grass top.png");
现在当我使用Maven2创建一个可执行jar时,一切正常,除了它找不到图像文件。我检查了jar,图像文件都放在jar的根目录中,所以我尝试使用:
Now when I create an executable jar out of this using Maven2 everything works, except it doesn't find the image files. I checked the jar, and the image files have all been put in the root of the jar, so I tried using:
File groundTopImageFile = new File("ground - grass top.png");
但没有成功。同样,我不能再在Eclipse中使用相同的代码了。有没有办法在jar和Eclipse中使这个工作?
but no success. Also in this way I can't use the same code within Eclipse anymore. Is there some way to make this work both in the jar and in Eclipse?
这是我的Pom.xml文件:
This is my Pom.xml file:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.WetWindmill</groupId>
<artifactId>Sheepness</artifactId>
<name>Sheepness</name>
<version>0.0.1-SNAPSHOT</version>
<description>Equilibrium reaction visualized with sheep :)</description>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.8</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>unpack-dependencies</id>
<phase>generate-resources</phase>
<goals>
<goal>unpack-dependencies</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>controller.Sheepness</mainClass>
<packageName>com.WetWindmill.Sheepness</packageName>
</manifest>
<manifestEntries>
<mode>under development</mode>
<url>www.WetWindmill.com/Projects/Sheepness/</url>
</manifestEntries>
</archive>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>${basedir}/target/dependency</directory>
</resource>
<resource>
<directory>${basedir}/src/main/resources</directory>
</resource>
</resources>
</build>
</project>
推荐答案
使用 ImageIO.read(inputStream)并阅读 InputStream
使用 ClassLoader.getResourceAsStream()
。
示例代码:
String resourceName = "my/picfolder/mypic.jpg";
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
InputStream stream = classLoader.getResourceAsStream(resourceName);
BufferedImage bi = ImageIO.read(stream);
注意:
在我的代码示例中, my / picfolder
是 <$ em $> crc / main / resources 。
In my code example, my/picfolder
is the relative folder hierarchy below src/main/resources
.
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