Eclipse Import Javaweb Project error: The superclass "Javax.servlet.http.HttpServlet" is not found on the Java Build Path

JSP pages written in the Javaweb project require Web container parsing to be processed into HTML to present to the front-end browser, and the Web container is required to parse the JSP.
The "Red" error message appears at the top of the JSP page: the superclass "Javax.servlet.http.HttpServlet" is not found on the Java Build Path.

Javax.servlet.http.HttpServlet is a class in the Web container tomcat package that resolves this problem by importing the required jar packages into the project.

Here are the specific workarounds:

Right-click Web Project, Build path-> Java build path-> libraries-> Add libray-> Server Runtime, Tomcat server

Eclipse Import Javaweb Project error: The superclass "Javax.servlet.http.HttpServlet" is not found on the Java Build Path