CODEWITHSUNDEEP
javamavenjarmaven-3
Ganesh
Ganesh

Reputation: 307

Loading files from Resource folder using java jar

I have download.sh file in my src/main/resource folder in maven project and I am reading it through below code

 ClassLoader classLoader = getClass().getClassLoader();
 File file = new File(classLoader.getResource("download.sh").getFile());

The file is reading when I run this as the standalone application.

If I run this as application using jar ex:-

java -jar runScript.jar SCHEMA_NAME

/Users/IdeaProjects/RunScript/target/file:/Users/IdeaProjects/RunScript/target/RunScripts.jar!/download.sh": error=2, No such file or directory

Can anyone help me in reading file from resource when executing with jar

Upvotes: 1

Views: 1260

Answers (3)

user207421
user207421

Reputation: 311039

Resources are not files. You can get their URLs, or input streams, but nothing you can do will turn a resource in a JAR file into a file on the disk that you can use with File. Short of unpacking the JAR file, that is.

Upvotes: 0

Kirill Simonov
Kirill Simonov

Reputation: 8491

I think this error happens when you try to read the file. This is because resources inside your jar are not files but streams. So you should use

getClass().getResourceAsStream("download.sh");

and then read that stream, for example:

InputStream resourceStream = getClass().getResourceAsStream("download.sh")
BufferedReader br = new BufferedReader(new InputStreamReader(resourceStream));
String line;
while ((line = br.readLine()) != null) {
    // do something
    System.out.println(line);
}

Upvotes: 1

Siva
Siva

Reputation: 703

I think you are not packaging your resources along with your jar. Please verify your jar contains the resource file (download.sh) with 

jar -tvf <yourfile.jar> | grep -i download

Upvotes: 0

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