在jar文件中加载图像 [英] Load images in jar file

问题描述

我正在尝试从可执行的JAR文件加载图像。

我已经按照这里，然后来自这里。

这是检索图像的功能：

  public static ImageIcon loadImage（String fileName，Object o）{
 BufferedImage buff = null; 
 try {
 buff = ImageIO.read（o.getClass（）。getResource（fileName））; 
 //也试过getResourceAsStream 
} catch（IOException e）{
 e.printStackTrace（）; 
返回null; 
} 
 if（buff == null）{
 System.out.println（Image Null）; 
返回null; 
} 
返回新的ImageIcon（buff）; 
} 
  

这就是它被调用的方式：

  logo = FileConverter.loadImage（/ pictures / Logo1.png，this）; 
 JFrame.setIconImage（logo.getImage（））; 
  

此是一个简单的对象。
我也没有得到 NullPointerException ，除非它被UI屏蔽。

我检查了JAR文件和图片位于：

/pictures/Logo1.png

这个当前代码既可以在eclipse中使用，也可以在导出到JAR并在终端中运行时使用，但在双击JAR时不起作用，在这种情况下，图标是默认的JFrame图标。 / p>

谢谢你的帮助。可能只有我遗漏了一些明显的东西。

解决方案

我曾经遇到类似的问题，结果发现问题是相对的问题不知何故，我的路径在错误的地方。我从我编写的一些旧代码中挖出这个代码，使其使用绝对路径。这似乎解决了我的问题;也许它适合你。

  String basePath =（new File（。））。getAbsolutePath（）; 
 basePath = basePath.substring（0，basePath.length（） -  1）; 
 FileConverter.loadImage（basePath +/ pictures / Logo1.png，this）; 
  

I'm trying to load an image from an executable JAR file.

I've followed the information from here, then the information from here.

This is the function to retrieve the images:

public static ImageIcon loadImage(String fileName, Object o) {
     BufferedImage buff = null;
     try {
        buff = ImageIO.read(o.getClass().getResource(fileName));
        // Also tried getResourceAsStream
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
    if (buff == null) {
        System.out.println("Image Null");
        return null;
    }
    return new ImageIcon(buff);
}

And this is how it's being called:

logo = FileConverter.loadImage("/pictures/Logo1.png", this);
JFrame.setIconImage(logo.getImage());

With this being a simple Object. I'm also not getting a NullPointerException unless it is being masked by the UI.

I checked the JAR file and the image is at:

/pictures/Logo1.png

This current code works both in eclipse and when it's been exported to a JAR and run in a terminal, but doesn't work when the JAR is double clicked, in which case the icon is the default JFrame icon.

Thanks for you're help. It's probably only me missing something obvious.

解决方案

I had a similar problem once, which turned out to be down to issues relative addressing and my path being in the wrong place somehow. I dug this out of some old code I wrote that made it use an absolute path. That seemed to fix my problem; maybe it will work for you.

String basePath = (new File(".")).getAbsolutePath();
basePath = basePath.substring(0, basePath.length()-1);
FileConverter.loadImage(basePath+"/pictures/Logo1.png", this); 

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