我有一个静态类,在类中,图像被加载到BufferedImage对象中,如下所示:
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,但它找不到图像文件。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:
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?
这是我的Pom.xml文件:
<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>
答案 0 :(得分:7)
使用ImageIO.read(inputStream)并使用InputStream
阅读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:强>
在我的代码示例中,my/picfolder
是 src/main/resources
下面的相对文件夹层次结构。
答案 1 :(得分:1)
URL imgURL = getClass().getResource("/ground - grass top.png");
if (imgURL != null)
{
return new ImageIcon(imgURL, "Ground Grass Top");
}
else
{
logger.error("Couldn't find file: " + "ground - grass top.png");
return null;
}
答案 2 :(得分:0)
使用类加载器getResourceAsStream()方法。
答案 3 :(得分:0)
不使用“/./resources/back_img.png”,而是在ClassLoader中使用“resources / back_img.png”。 这是一个例子:
String path = "resources/back_img.png";
ClassLoader cl = ImageHandler.class.getClassLoader();
URL imgURL = cl.getResource(path);
//URL imgURL = ImageHandler.class.getResource(path);
if (imgURL != null) {
ImageIcon icon = new ImageIcon(imgURL, description);
Image img = icon.getImage();
Image sizedImg = img.getScaledInstance(width, height, Image.SCALE_DEFAULT);
return new ImageIcon(sizedImg);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
答案 4 :(得分:0)
你解决了我的问题,肖恩帕特里克弗洛伊德。谢谢 它在IDE之间似乎有所不同,但是,看到jar文件的结构,我们知道相对路径是什么。 就我而言,我使用Netbean,我的文件放在 src / my / picfolder / mypic.jpg (它与肖恩的src / main / resources / my / picfolder / mypic.jpg ),但是当构建时,提取jar文件我们将在 my / picfolder / mypic.jpg 中看到图像。所以当我们调用 getResourceAsStream
时,相对路径必须是 my / picfolder / mypic.jpg