• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 558
  • Last Modified:

JAVA storeing files in META-INF directory

I stored an xml file in the JARs META-INF directory and want to read that file using a path relative to the JARs root

this is what I'm doing:
ClassLoader cl = Thread.currentThread().getContextClassLoader();
URL url = cl.getResource( "META-INF/test.xml" );
Initializer init = new Initializer(new File(url.getFile()).getAbsolutePath());

The absolute path is returned as: C:/Jar_root/abc.jar!/META-INF/test.xml

If I try to use this as a file path I get a FileNotFoundException due to a illegal path syntax.

I need to use it this because inside the jar i have an entry point function, and I want to be able to run this:

C:\Jar_root\java -jar abc.jar

inside this jar, the first thing it'll do is it needs to go to the xml file stored inside the META-INF directory to get some information.

and I can't figure why it's complaining about the FileNotFound.  it's trying to get into the jar file, but it can't.

any help is much appreciated! thanks
0
energie
Asked:
energie
  • 3
  • 2
  • 2
1 Solution
 
CEHJCommented:
BufferedReader in = new BufferedReader(new InputStreamReader(cl.getResourceAsStream( "/META-INF/test.xml" )));

should do it
0
 
energieAuthor Commented:
Do you see where that problem comes from?  i've tried what you suggested and it doesn't work.  I dont think i made a syntatic error, I might be missing something somewhere

thanks
0
 
objectsCommented:
try moving your xml file outside META-INF.
0
Cloud Class® Course: Microsoft Exchange Server

The MCTS: Microsoft Exchange Server 2010 certification validates your skills in supporting the maintenance and administration of the Exchange servers in an enterprise environment. Learn everything you need to know with this course.

 
energieAuthor Commented:
Hi 'objects',

unfortunatley, if i move the xml files outside the  META-INF directory, i will not be able to even locate it using the class-loader, since that's one of the places it looks for files to load.

dang it, i know I'm so close to the answer.

if i look at this:
C:/Jar_root/abc.jar!/META-INF/test.xml

i can see that it is TRYING to get to the META-INF directory inside this Jar file, if i manually unpack the jar file, i can confirm that there is a META-INF directory as expected.

I don't know what I am missing. :(
0
 
objectsCommented:
>  i will not be able to even locate it using the class-loader

Why do you think that? Try it and see :)

The meta-inf directory is not the place for data files.

0
 
CEHJCommented:
The standard approach to this works fine, and although i agree your own data files shouldn't go into META-INF the following works fine after adding the appropriate file to the archive:


import java.io.IOException;
import java.io.InputStream;

public class ReadFromMetaInf {

  public static void main(String[] args) {
    ReadFromMetaInf x = new ReadFromMetaInf();
            try {
                  x.displayContent();
            }
            catch(IOException e) {
                  e.printStackTrace();
            }
  }
      
      public void displayContent() throws IOException {
            InputStream in = getClass().getResourceAsStream("/META-INF/x.txt");
            int buf = -1;
            while ((buf = in.read()) > -1) {
                  System.out.write(buf);
            }
            in.close();
      }
}


0
 
CEHJCommented:
8-)
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Cloud Class® Course: Ruby Fundamentals

This course will introduce you to Ruby, as well as teach you about classes, methods, variables, data structures, loops, enumerable methods, and finishing touches.

  • 3
  • 2
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now