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Permission + Policy File + Java Applet

844235Sep 10 2011 — edited Sep 12 2011
Hi everyone,

I developped a small Java applet for testing purposes.
The aim of the applet is getting data from a MySql database and displayed it into a JLabel.
I use a MySql jdbc layer contained in a Jar file.

I tested the applet locally via Eclipse and it works fine.
Then, I packaged my ".class" files into a Jar file.
I uploaded the resulting Jar file to the server as well as the jdbc Jar file.

I tried to launch the applet located on the server from my web browser (IE9).
An error occured.
I analysed the results in the Java console.
The reason of the problem follows :
I miss a permission grant in my policy file.
The missing line is : permission java.util.PropertyPermission "file.encoding", "read";

For information, the policy file is located at : jre7|lib|security

I do no want to ask the users of my future applet to modify their policy file.
So, I am wondering if there is a way to consider a custom policy file when executing a Java applet.
The custom policy file would be located on the same server as the applet is.

Thanks in advance for your help.
This post has been answered by DrClap on Sep 12 2011
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Locked due to inactivity on Oct 10 2011
Added on Sep 10 2011