No. You are supposed to make use of only a JSPWriter object (given to you in the form of the implicit object out) for replying to clients.
A JSPWriter can be viewed as a buffered version of the stream object returned by response.getWriter(), although from an implementational perspective, it is not.
In general, it is not recommended to use a ServletOutputStream directly from within a JSP page. The JSP (JavaServer Pages) technology is designed to separate presentation logic from business logic. The use of ServletOutputStream is typically associated with Servlets, which handle the business logic and generate the response.
JSP pages are meant to be a higher-level abstraction for creating dynamic web content by embedding Java code within HTML-like tags. The idea is to keep the business logic in JavaBeans or servlets and use JSP primarily for presentation.
If you find yourself needing to use a ServletOutputStream in a JSP, it might indicate a design issue. Consider refactoring your code to move the logic that interacts with the ServletOutputStream to a Servlet or a JavaBean, and then call that logic from your JSP using appropriate JSP tags.
It’s worth noting that mixing business logic with presentation logic in a JSP can lead to code that is harder to maintain and understand. Following best practices, such as the Model-View-Controller (MVC) pattern, can help improve the structure and maintainability of your web application.