cannot find resource with maven, even with resource marked as root directory

Question

I am trying to read pws.csv in the resources directory with this line:

BufferedReader br = new BufferedReader(new InputStreamReader(App.class.getClass().getResourceAsStream("pws.csv")));

When I try to run it in IntelliJ or the comiled jar, I get a NullPointerExceptions, which I understand means that the file cannot be found. I also tried variations on the path like "/pws.csv" and "src/main/resources/pws.csv" and got the same error. My understanding is, that when using maven, "src/main/resources" is a special directory and intelliJ will recognize it, when searching for resources do I have to change some setting to achieve this or am I just stupid ?

Edit: Listing of the jar:

Stacktrace of running that jar:

Exception in thread "main" java.lang.NullPointerException
    at java.base/java.io.Reader.<init>(Reader.java:167)
    at java.base/java.io.InputStreamReader.<init>(InputStreamReader.java:72)
    at com.kolan.Main.main(Main.java:8)

Can you please describe what: `For some reason it wont work,` means? Exception? does not work in IDE? Does not work on command line?? — khmarbaise, Dec 23 '22 at 11:43
*i also tried variations on the path like "/pws.csv"* And that's the very one that ought to work. — g00se, Dec 23 '22 at 12:17
@khmarbaise editet the Question to include the error. I am sorry. — Connor Kolan, Dec 23 '22 at 12:37
Please include the listing of the compiled jar: `jar tf foo-bar-1.0-SNAPSHOT.jar` *formatted as code* *@khmarbaise editet the Question to include the error. I am sorry.* I don't see that edit... — g00se, Dec 23 '22 at 12:57
Make it absolute (`/pws.csv`), not relative (without slash)! ...who knows where it otherwise resolves to!? (-> `/com/kolan/pws.csv`!?;) — xerx593, Dec 23 '22 at 13:03
And of course good old: [Class.getResource vs ClassLoader.getResource](https://stackoverflow.com/q/6608795/592355) — xerx593, Dec 23 '22 at 13:07
@xerx593 the .csv is under target/classes/com/ is that the correct directory here? Also I tried using the ClassLoader but I got the same result ( Main.class.getClassLoader().getResourceAsStream ) — Connor Kolan, Dec 23 '22 at 13:20
*is that the correct directory here?* No. It should be one higher. But according to the gui tree, that shouldn't be happening — g00se, Dec 23 '22 at 13:26
Then it should work with /pws.csv. It's probably better to have at least one directory of the resource root though — g00se, Dec 23 '22 at 13:32
Sadly it does not, i still get the same error when running the jar and the file via intelliJ — Connor Kolan, Dec 23 '22 at 13:34
@g00se what exactly do you mean by that "It's probably better to have at least one directory of the resource root though" ? — Connor Kolan, Dec 23 '22 at 13:36
Since you still haven't posted the listing I can't really say why. Don't worry about my remark about directories at the moment. That's not going to help immediately — g00se, Dec 23 '22 at 13:36
Please never post images of text. They are not searchable, we cannot copy-paste... Always copy-paste the text and format it properly. But put that into practice right now by pasting the full stack trace of running the jar — g00se, Dec 23 '22 at 13:58

score 0 · Answer 1 · answered Dec 23 '22 at 19:33

0

Put pwc.csv in a folder that is on the classpath. And of course, double check your classpath setting.

answered Dec 23 '22 at 19:33

Stu

15
8

cannot find resource with maven, even with resource marked as root directory

1 Answers1