How can I add src/main/resources to the classpath when using mvn exec:java

Question

I'm trying to run the following application which attempts to load a file (src/main/resources/test.txt) from the classpath:

package com.example;

public class Main {
    public static void main(String[] args) {
        System.out.println(Main.class.getResource("test.txt"));
    }
}

When I do mvn exec:java -Dexec.mainClass=com.example.Main, I get null printed out on the command line.

So how do I get the files in src/main/resources added to the classpath? Note that I ran mvn package, checked the generated target/test.jar, and confirmed that it included test.txt at the top level.

score 7 · Accepted Answer · 2012-12-26 19:40:13Z

7

A slash should solve it

System.out.println(Main.class.getResource("/test.txt"));

Your code would work if you placed the test.txt file under:

src/main/resources/com/example

edited Dec 26, 2012 at 19:40

answered Dec 26, 2012 at 19:28

user462963

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2 Comments

khmarbaise Over a year ago

If you put the test.txt into the com/example package it will not work. To get that working correctly you need to put the test.txt into src/main/resources nothing else.

user1930555 Over a year ago

Okay. I think I understand now. So getResource interprets paths relative to the class instance (so since Main is in com.example I was accidentally looking for src/main/resources/com/example/test.txt instead of src/main/resources/test.txt)

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