Adding or removing an error page from a Web application
Error pages are pages that you configure to display in response to
specific HTTP error codes. To add or remove an error page from a Web application,
you must add or remove the error page from the web.xml file. To do this using
the Web deployment descriptor editor, complete the following steps:
Open the Web perspective and display the Project Explorer.
Expand your project and double click on the Deployment Descriptor
icon. The Web deployment descriptor window appears.
Select the Pages tab, and in the Error Pages section, select
the Add button to add an error file. To remove an error file, select
the file and then select the Remove button.