英文:
How do I load an image after I generated a .jar file with eclipse?
问题
我刚刚用Java写了一个小程序，可以将图像打印在窗口上。我使用了JPanel来加载图像：
public class Board extends JPanel {
private Image mummy;
public Board() {
initBoard();
}
private void initBoard() {
loadImage();
int w = mummy.getWidth(this);
int h = mummy.getHeight(this);
setPreferredSize(new Dimension(w, h));
}
private void loadImage() {
ImageIcon ii = new ImageIcon("mummy.png");
mummy = ii.getImage();
}
@Override
public void paintComponent(Graphics g) {
g.drawImage(mummy, 0, 0, null);
}
}
然后使用JFrame来打印图像。然后，我通过Eclipse的导出部分（Runnable JAR文件）创建了.jar文件。
问题是，现在当我运行.jar文件时无法加载图像。我尝试将图像放在.jar压缩包的各个位置，但代码根本不会加载它。
是否有人知道如何使用这种方法加载图像，或者我应该使用包装器来创建.jar文件，而不是使用Eclipse？
英文:
I just wrote a mini-program in java that takes an image and prints it on frame.
I used JPanel to load the image:
public class Board extends JPanel {
private Image mummy;
public Board() {
initBoard();
}
private void initBoard() {
loadImage();
int w = mummy.getWidth(this);
int h = mummy.getHeight(this);
setPreferredSize(new Dimension(w, h));
}
private void loadImage() {
ImageIcon ii = new ImageIcon("mummy.png");
mummy = ii.getImage();
}
@Override
public void paintComponent(Graphics g) {
g.drawImage(mummy, 0, 0, null);
}
}
and JFrame to print it.
Then I created the .jar file via the export section of Eclipse (Runnable JAR file).
The problem is that now I can't load the image when I run the .jar file. I tried putting the image everywhere on the .jar zip but simply the code doesn't load it.
Everyone knows how to load the images using this method, or should I use a wrapper to create the .jar file instead of eclipse?
答案1
得分: -1
大家，我找到解决方法了：
ImageIcon("<fileName>")，默认的起始目录是代码所在的位置，但在Eclipse项目和Eclipse生成的可运行jar文件之间会有所不同。
- 当它是一个项目时：它是项目的目录，即src和bin目录所在的位置。
- 当它是一个.jar文件时：src目录不存在，起始目录现在是.jar文件所在的目录。
举个例子：
为了简单起见，让我们将创建的可运行文件放在~目录下。
使用 new ImageIcon("src/images/mummy.png")，你需要将目录"images"与相关文件放在项目的src目录中，即源文件和包所在的位置，形成以下结构：
...eclipse-workspace/Project/src/cli/*.java -源代码所在位置。
...eclipse-workspace/Project/src/images/mummy.png -文件所在位置。
在使用Eclipse创建了可运行的.jar文件后，你需要在与.jar文件相同的目录中放置一个新的"src"目录，并在其中放置"images"目录，形成以下结构：
~/project.jar （.jar文件）
~/src/images/mummy.png （我在代码中使用new ImageIcon("src/images/mummy.png")加载的图片）
不管怎样，感谢大家的评论。
英文:
Guys I figured it out:
The ImageIcon("<fileName>"), has as default starting directory where all the code is put, but varies between an eclipse project and an eclipse generated Runnable jar file.
-When it's a project: it's the directory of the project, so where the src and bin directory are.
-When it's a .jar: src doesn't exist, and the starting directory now is the directory where the .jar file is situated.
For example:
for simplicity let's situate the created runnable files in the ~ directory.
-Using new ImageIcon("src/images/mummy.png"), you'll have to put the directory "images" with the relative files in the src directory of the project, where the source files and packages are, making a structure like this:
...eclipse-workspace/Project/src/cli/*.java -where the source code is.
...eclipse-workspace/Project/src/images/mummy.png -where the file is.
After you created the runnable .jar with eclipse, you'll have to put a new "src" directory with the "images" in the same directory where the .jar is, making a structure like this:
~/project.jar (the .jar file)
~/src/images/mummy.png (the image I loaded in the code with new ImageIcon("src/images/mummy.png")
Thanks for the comments anyways.
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