引用JAR中的文件

Question

I am creating a Java app for some serial port communication and within the app's folder I have two resources that need to be present at run-time. The first is an image that is being used as a splash screen and the other is a configuration file that needs to be read as the program starts.

Here is an abridged version of the output from the "tree" command in Linux, the two files that I need to be referencing are "commandSet.config" and "splash-screen2.png"

.
├── bin
│   ├──...
├── commandSet.config
├── app-manifest.txt
├── splash-screen2.png
└── src
    ├── events
    │   └── InterfaceEvents.java
    ├── models
    │   ├── Command.java
    │   └── Phone.java
    ├── operations
    │   ├── Application.java
    │   ├── ...
    └── views
        ├── CallDialog.java
        ├── SplashScreen.java
        └── Window.java

I am currently referencing in the following lines:

BufferedReader in = new BufferedReader(new FileReader("commandSet.config"));

and

JLabel image = new JLabel(new ImageIcon("splash-screen2.png"));

This works fine when I am running it from Eclipse, but as soon as I export to a runnable JAR the files are not moved and therefore aren't correctly referenced. I have tried moving them into the "src" folder, which resulted in them being archived within the JAR, but I still couldn't reference them.

I'm pretty new to the concept of exporting Java projects, so maybe I have missed something obvious. If someone could show me the best way to do this and the best approach for future project file systems, I would be very grateful. Cheers!

Answer 1

 InputStream in = this.getClass().getClassLoader().getResourceAsStream("splash-screen2.png");  
byte[] buffer = new byte[in.available()];
in.read(buffer);  
ImageIcon icon = new ImageIcon(buffer);

Answer 2

You can't access that file the same way you would if it were in the file system.

Use getResourceAsStream() from your context to read it from the CLASSPATH using the class loader.

Answer 3

Ok, I mananged to crack this and thought I'd drop an answer for others in the future. I basically followed "duffymo's" guidelines, here's what I did:

• Created a JAR with my resources in.
• Put that JAR in the root of the project.
• Used Eclipse to add that JAR to the build path.
• Used getResourceAsStream(" /nameOfFile.ext ") to get the streams for my resources.

Cheers!