java.security.AccessControlException: Access denied (java.io.FilePermission

Question

final File parentDir = new File("S:\\PDSPopulatingProgram");
parentDir.mkdir();
final String hash = "popupateData";
final String fileName = hash + ".txt";
final File file = new File(parentDir, fileName);
file.createNewFile(); // Creates file PDSPopulatingProgram/popupateData.txt

I am trying to create a file in a folder but I am getting exception as

java.security.AccessControlException: Access denied

I am working in windows environment. I can create a folder from the Windows Explorer, but not from the Java Code.

How can I resolve this issue?

Sounds like you don't have permission to create a file on that network share. Can you create a file in that directory from within Windows Explorer or the command line? — Jim Garrison, May 04 '12 at 18:17
Yes I can create a folder from the Windows Explorer, but not from the Java Code. Don't know why? Any help will be appreciated. — arsenal, May 04 '12 at 18:18
How is the Java app being launched? Is it running with the same privileges as your desktop session? — Jim Garrison, May 04 '12 at 18:34
I am running the java code from my eclipse, and its workspace is setup in D drive. — arsenal, May 04 '12 at 18:35
Guys, this is a `java.security` exception. It has nothing to do with operating system permissions. It has to do with permissions enforced by the Java Security Manager. — user207421, Dec 24 '13 at 01:32

score 27 · Answer 1 · edited Jan 24 '18 at 19:22

27

Within your <jre location>\lib\security\java.policy try adding:

grant { permission java.security.AllPermission; };

And see if it allows you. If so, you will have to add more granular permissions.

See:

Java 8 Documentation for java.policy files

and

http://java.sun.com/developer/onlineTraining/Programming/JDCBook/appA.html

edited Jan 24 '18 at 19:22

Jay Taylor

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answered May 04 '12 at 19:36

Petey B

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That was it in my case! – MichaelEr Jun 12 '23 at 12:06

score 8 · Answer 2 · edited Dec 24 '13 at 01:12

8

Although it is not recommended, but if you really want to let your web application access a folder outside its deployment directory. You need to add following permission in java.policy file (path is as in the reply of Petey B)

permission java.io.FilePermission "your folder path", "write"

In your case it would be

permission java.io.FilePermission "S:/PDSPopulatingProgram/-", "write"

Here /- means any files or sub-folders inside this folder.

Warning: But by doing this, you are inviting some security risk.

edited Dec 24 '13 at 01:12

answered Sep 07 '12 at 11:48

Naved

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Special thanks for mentioning "/-". On windows, it will not work with backslashes in paths (like "\-"), and I assumed the wildcard operator would be "*", which led me straight into configuration hell... – RobertG Sep 05 '14 at 09:56

score 1 · Answer 3 · answered Feb 27 '20 at 11:46

1

Just document it here on Windows you need to escape the \ character:

"e:\\directory\\-"

answered Feb 27 '20 at 11:46

Moshe L

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From the [Oracle docs on policy files](https://docs.oracle.com/javase/7/docs/technotes/guides/security/PolicyFiles.html): In order to assist in platform-independent policy files, you can also use the special notation of "${/}", which is a shortcut for "${file.separator}". This allows things like `permission java.io.FilePermission "${user.home}${/}*", "read";` – Peter Wippermann Nov 22 '21 at 10:54

java.security.AccessControlException: Access denied (java.io.FilePermission

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