If a JSP causes an exception to be thrown, good practices dictate that the exception is handled by code, or that the user be forwarded to an error page.
Exceptions can be caught in scriptlets.
Use the <%@ page errorPage="/error.jsp" %> directive to define an error page.
Identify the error page with the page directive, <%@ page isErrorPage="true" %>.
The JSP container makes the implicit exception object available to a defined error page.
