Description Resource Path Location Type the superclass "Javax.servlet.http.HttpServlet" is not Foun

I haven't built a new project in person for some time. The following exception was found when building a MAVEN project today, Description Resource Path location Type

The superclass "Javax.servlet.http.HttpServlet" is not found on the Java Build Path Index.jsp/easybuy/src/main/webapp li NE 1 JSP problem

After looking for the reason, the original is because forgot to set up Server runtime environment, click the Step setting can:

Set up the appropriate server runtime environment to suit your needs

Exception solved.

Description Resource Path Location Type the superclass "Javax.servlet.http.HttpServlet" is not Foun