hello.i am trying to is integrate jpa into my servlets .i am posting my code as below:
i am getting following error
javax.persistence.PersistenceException: Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Unable to acquire a connection from driver [org.apache.derby.jdbc.ClientDriver], user  and URL [jdbc:derby:localhost:1527/sample;create=true]. Verify that you have set the expected driver class and URL. Check your login, persistence.xml or sessions.xml resource. The jdbc.driver property should be set to a class that is compatible with your database platform
Internal Exception: java.sql.SQLException: No suitable driver found for jdbc:derby:localhost:1527/sample;create=true
Error Code: 0
please need to ocmplete as early as possible .early suggestions are most welcomed..