The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path

* 이클립스에 Server를 세팅하지 않아서 jsp에 생기는 오류

"The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path"

* 해결 방법 : Server 연결

Build Path > Configure Build Path > Java Build path > Libraries탭 

> Add Library > Server Runtime > next > 설정된 Apache Tomcat서버 선택 > Finish > apply and close