Java Web Start & JNLP

Why don't you put all files (the app and the txt) in a global .jar file ?

Hi..
Try this..

import javax.jnlp.*;
    ...

    DownloadService ds;

    try {
        ds = (DownloadService)ServiceManager.lookup("javax.jnlp.DownloadService");
    } catch (UnavailableServiceException e) {
        ds = null;
    }

    if (ds != null) {

        try {
            // determine if a particular resource is cached
            URL url =
                    new URL("http://localhost\file location
            boolean cached = ds.isResourceCached(url, "1.0");
            // remove the resource from the cache
            if (cached) {
                ds.removeResource(url, "1.0");
            }
            // reload the resource into the cache
            DownloadServiceListener dsl = ds.getDefaultProgressWindow();
            ds.loadResource(url, "1.0", dsl);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

LGG

Hi LGG,

     I've tried your code but it doesn't seem to download the file. I don't receive any error but I don't get the file either. How can I know if the download was succesfully and how can I acces the downloade file ?

If you put the file in your jar then you can simply read it using:

InputStream in = ClassLoader.getSystemResourceAsStream("filename.txt");

// Read your file from input stream

I don't want to use the file inside the jar !
I now this way it's working, because the file will be downloaded by JavaWebStart. But I need the file outside the jar because will be modified very often, and I don't want to modify the whole jar every time.

Then you'll need to make it available somewhere for download, as far as I know Web Start doesn't support additional resources.
Will check for u.

The txt file is in the same directory with the jar file and the JNLP file on the server.

If I try to download the file like this :

http://servername/filename.txt with any browser, it's working!

So, that mean it's available for download...., isn't it ?

JNLP only supports specifying jars, images, and other jnlp's. So you'll need to jar your external text file for jnlp to grab it.

Something like this:

<resources>
  <jar href="http://abc.com/text.jar"/>
</resources>

Then use the standard getResource methods in your code to access your data.

If you need more info have a look at the JNLP spec.

That does mean its available for download.

Maybe you can ask Sey again to solve the problem.


Best Regards,   :)

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