CODEWITHSUNDEEP
javamaven
Mohamed Taher Alrefaie
Mohamed Taher Alrefaie

Reputation: 16233

Loading resources from another maven module with mvn exec:java doesn't work

I have a maven project with this structure:

parent
-----module1
--------src
------------main
-----------------java
----------------------Loader.java
-----------------resources
-------------------------file1.txt
-----module2
--------src
------------main
-----------------java
-------------------------CallLoader.java

So Loader.java, loads files1.txt. I call this class from CallLoader.java from module2. This is the code I used

In Loader.java, 

private static File getResourceFile(String fileName){
        try {
            URL resource = GraphUtil.class.getClassLoader().getResource(fileName);
            return new File(resource.getPath());
        } catch (Throwable e) {
            throw new RuntimeException("Couldn't load resource: "+fileName, e);
        }
}

where fileName="file1.txt".

I get an error because the file absolute path looks like this:

file:/home/moha/.m2/repository/my/package/name/%7Bproject.version%7D/base-%7Bproject.version%7D.jar!/file1.txt

What exactly am I doing wrong?

Upvotes: 1

Views: 65

Answers (1)

Nicolas Filotto
Nicolas Filotto

Reputation: 44965

Get the content of your file as a stream instead in order to be able to read your resource from a jar file which is the root cause of your issue. In other words use getResourceAsStream instead of getResource.

You can also return the URL instead of File then call openStream() later to read it if needed.

NB1: the URL will be of type jar:file/... which cannot be managed by the class File

NB2: To convert a URL into a File, the correct code is new File(resource.toURI())

Upvotes: 2

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