Thanks for your posting and using Aspose.Cells.
Evaluation Warning is shown when you use Aspose.Cells without setting the license. If you will not set the license, then Aspose.Cells will run in Evaluation Mode.
If you want to get rid of Evaluation Warning worksheet, then you will have to set license which will make Aspose.Cells to run in Licensed Mode.
For example, the following code is setting the license.
String yourLicenseFilePath = “F:\License\Aspose.Total.Java.lic”;
com.aspose.cells.License lic = new com.aspose.cells.License();
You can purchase a License or request 30-Days Temporary License. If you have any purchase related question, then kindly post in Aspose.Purchase forum.
For more information on Licensing, kindly visit the following documentation article for your reference.
( http://www.aspose.com/docs/display/cellsjava/Licensing )