Bundle certificate file inside .jar file

[Imre Tokai]

Hello,


Using an API that requires certification file for initialization;
When certificate file is anywhere in the file system it can be loaded properly via it's path, but when i bundle it into plugin.jar
and tried to reach it via:

certificateFilePath = this.getClass().getResource("/certificate/certificatefile.q0").getFile();

it gives
java.lang.InstantiationException: API Client initialisation failed: Could not open certificate file 'file:\C:\application_server\plugins\payway.jar!\certificate\certificatefile.q0' - check that the correct certificate file is being referenced
Formerly i used

this.getClass().getResource(

for other resources, config files and it worked properly


Is it possible to bundle certificate file into .jar file? How to do this correctly?



Regards

[James Sabre]

One cannot use getFile() on a URL that is not a file URL. Are you sure that the API you are using does not have an alternate method/constructor that takes in InputStream rather a File? If there is such a method/constructor then you can use

InputStream is = this.getClass().getResourceAsStream("/certificate/certificatefile.q0")

to get an InputStream.

If there is no appropriate method/constructor then your only real choice is to copy the certificate out of the jar file and write it to a temporary file on disk. You can do this by copying the content of the InputStream obtained from getResourceAsStream() to a FileOutputStream.