ClassNotFoundException: net.sourceforge.jtds.jdbc.Driver

Question

I have java code which connects to a MS-SQL database and procures some data.

Before running the code I set the class path in the Unix Server and it used to work fine.

But for some reason the same jar file which was working a few days back is throwing a Class not found exception java.lang.ClassNotFoundException: net.sourceforge.jtds.jdbc.Driver

I have un-jared the jar file and found that the driver class which I'm loading :

Class.forName("net.sourceforge.jtds.jdbc.Driver");

is present in the specified package structure.

I don't understand how this is happening.

Can anyone suggest any tips to resolve this.

Answer 1

The issue of java.lang.ClassNotFoundException might be the outcome of several reasons:

• Jar file is not available in class path. (This is not your case. as you have mentioned).

• Your jar file is corrupted.

• Your environment variable value is not accessible by current user. (Permission revoked by administrator).

• Current user don't have permission to read jar file.

Please verify the last three options.

Answer 2

Right button on project-> Properties - > Java built Path -> Order and Export -> And check checkBox with you jar.

If you connect on Android project to Use 1.2.7 version.

Answer 3

I know it's late, but for others facing the same problem..

If you are using eclipse:
1. Go to Project -> Properties -> Java Build Path -> Order and export.. and check the jar file for jtds.version.jar
2. Go to Run Configurations and add this jar file to the user defined jars.

Hope this helps..:)