无法使用相对路径将文件从jar读取到FileInputStream中

Question

Given I am able to load my mail.properties file such as :

ResourceBundle rb = ResourceBundle.getBundle("META-INF.mail");
System.out.prinltn("subject :" + rb.getString("email.subject")); //output : 'subject : Job Application'

However I am unable to read; in the same method; my mail.properties file as a FileInputStream . I have tried all these options none of them worked and I am always getting a FileNotFoundException :

FileInputStream fis = new FileInputStream("META-INF/mail.properties");
FileInputStream fis = new FileInputStream("META-INF//mail.properties");
FileInputStream fis = new FileInputStream("META-INF\\mail.properties");

The folder META-INF exists within a jar that is loaded at build time :

Any help will be more than appreciated.

Answer 1

The problem is FileInputStream() will look for paths relative to current directory. Since your META-INF is inside the imported jar, it won't be able to find it.

As per this post , you have following options:

1. Specify an absolute filename
2. Specify a relative filename which takes into account where you're running this
3. Bundle the file as a resource and use Class.getResourceAsStream or similar

check it out for more details. My question if you are able to load it with ResourceBundle , why are you trying to reload it in a different way?