Reading a file using a relative Path

[Carlos Duque]

Hi,

I'm trying to load a file like this:

   
 
package uni.server;
.
.
public class Datamanager {
.
.
       public void init2() {
            try {
                String xmlrules = "resources/student-records-digester-rules.xml";
                File rules = new File( xmlrules ); 
                URL url1 = this.getClass().getClassLoader().getResource("resources/student-records-digester-rules.xml");
                URL url2 = rules.toURL();
                
                if (url1 != null) {
                System.out.println("URL1: " + url1.toString());
                } else {
                    System.out.println("URL1 is null");
                }
                
                if (url2 != null) {
                System.out.println("URL2: " + url2.toString());
                } else {
                    System.out.println("URL2 is null");
                }
}
}
 

But url1 is always "null". I have to use .getResource() because everything will be in a single jar file, the structure of the project is :

userver/src/uni/server/Datamanager
userver/src/resources/student-records-digester-rules.xml        
 

and the output from System.out.println("user.dir") is: D:\proyectos\workspace\nb\userver

Any Ideas on what I'm doing Wrong?

[Joe Ess]

Originally posted by Carlos Duque:
I have to use .getResource() because everything will be in a single jar file

Is everything currently jar'ed up? If not, you will have to put userver/src on the classpath for the classloader to find resources/student-records-digester-rules.xml.

[Carlos Duque]

Thanks Joe,

I managed to solve it, and then got into another problem with an inputStream:

  inputStream = Datamanager.class.getResourceAsStream("resources/student-records.xml");                 

I got it working too and the code ended up being:

    
        public void init() {        
            try {                
                Digester digester = DigesterLoader.createDigester(this.getClass().getClassLoader().getResource("resources/student-records-digester-rules.xml"));          
                inputStream = Datamanager.class.getResourceAsStream("/resources/student-records.xml");                
                db = (DB)digester.parse(inputStream);                
            } catch (MalformedURLException ex) {
                logger.error("MalformedURLException: " + ex.toString() + " " + ex.getMessage());
            } catch (IOException ex) {
                logger.error("IOException: " + ex.toString()+ " " + ex.getMessage());
                //ex.printStackTrace();
            } catch (SAXException ex) {
                logger.error("SAXException: " + ex.toString()+ " " + ex.getMessage());
                //ex.printStackTrace();
            } 
        }

However, I don't understand why

  this.getClass().getClassLoader().getResource("resources/student-records-digester-rules.xml")  

doesn't need a "/" at the beginnig of the Path to the file but this line:

                  inputStream = Datamanager.class.getResourceAsStream("/resources/student-records.xml");               
  

Does need the "/". Sorry, but couldn't find anything on the documentation that discussed this so I thought I could ask here if anyone knows the reason behind this difference.

Regards,

[ June 07, 2007: Message edited by: Carlos Duque ]

[ June 07, 2007: Message edited by: Carlos Duque ]
[ June 07, 2007: Message edited by: Carlos Duque ]