Jar and Policy file

Posted on 2004-09-10
Last Modified: 2008-02-26
Hi All,
      Earlier we used to execute our application using the run.bat file containing the following command:
java -classpath .\lib -D"java.ext.dirs=.\lib" com.sciatl.svt.ui.Login

      Obviously it opens up a dos console which we are trying to avoid in the current release and the only option is to package all the class file in a jar file. With the help of the manifest file i am launching the Login class.

Here is the manifest file:

Manifest-Version: 1.2
Created-By: 1.3.1 (Sun Microsystems Inc.)
Main-Class: com.sciatl.svt.ui.Login
Class-Path: lib/classes12.jar lib/ejb.jar lib/jaas.jar lib/jaxb-rt-1.0-ea.jar lib/jta.jar lib/oc4j.jar lib/oc4jclient.jar

Now i don't know how to specify the client.policy file in my manifest file or can i specify my policy file somewhere?

Kindly let me know if you have any suggestions or ideas.

Thanks & Regards,
Question by:PRAC

Expert Comment

ID: 12024927
LVL 92

Expert Comment

ID: 12024931
don't think you can sorry
LVL 24

Expert Comment

ID: 12024982
You can avoid the console window by invoking javaw in stead of java
I don't know the answer about the policy file.

Author Comment

ID: 12025085
Even if i use javaw instead of java, when i double click my run.bat the dos console window comes up.
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Author Comment

ID: 12025187
I am able to ignore the dos window by adding "start" before javaw in my run.bat file. Now my run.bat contains:

start javaw -classpath .\lib -D"java.ext.dirs=.\lib" com.sciatl.svt.ui.Login

Thanks & Regards,
LVL 24

Expert Comment

ID: 12025331
I presume you run on Windows98 or ME : indeed that's a bug.


Author Comment

ID: 12025348
The OS is Windows XP.

Accepted Solution

helloexpert earned 125 total points
ID: 12026414
try this

i.e, create an entry for the security policy in the manifest file as
Security-Policy=your file path

then in the java code, get the security policy like this

         JarFile jar = new JarFile(path);
          Manifest mfest = jar.getManifest();
          Attributes attr = mfest.getMainAttributes();
          String cp = attr.getValue("Security-Policy");

then use System.setProperty(..) to set the new policy file.

hope that helps.

Author Comment

ID: 12033781
I am able to set my policy file using the following line in my Login class:
System.setProperty("", "client.policy");

Thanks to "helloexpert".

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