Is it possible to read a properties file from a jar?

Hello,

I was just wondering if it was possible to read a properties file that was bundled with another jar file?

Appreciate any help or alternatives! (aside from including the properties file here... lol)
Errang GenevreAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

dpearsonCommented:
Yes that should be possible.

It's been a while since I wrote any code like this (it always seems rather clumsy how you get resources and class loaders) but I think it's something like this sequence.  (There may be short cuts available to reduce the number of calls here - as I say it's been a while).

The basic idea is you get a class loader for the Jar file and then open a stream within the jar and read the properties file.

Along these lines (this code is just approximate - you'll likely need to tweak it):

	private static ClassLoader getClassLoader(File confFolder) throws Exception {
		ClassLoader loader = MyClass.class.getClassLoader();

		if (confFolder != null) {
			URL confURL = confFolder.toURI().toURL() ;
			URLClassLoader cls = new URLClassLoader(new URL[]{ confURL }, loader) ;
			loader = cls ;
		}
		
		return loader ;
	}

        // ConfFolder in your case should point to the jar file
        // propertiesFile would be the path within the jar
        public static Properties loadPropertiesFile(File confFolder, File propertiesFile) throws Exception {
		ClassLoader cls = getClassLoader(confFolder) ;
		InputStream input = cls.getResourceAsStream(propertiesFile); 
		Properties properties = new Properties() ;
		properties.load(input) ;
                return properties ;
      }

Open in new window


Hope that helps,

Doug
0
CEHJCommented:
InputStream in = getClass().getResourceAsStream("/p.properties");

Open in new window

is really all you need. The path is package-relative
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Errang GenevreAuthor Commented:
Thanks!
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Java

From novice to tech pro — start learning today.