Servlet libraries are not defined in Eclipse - eclipse

Question

I am trying to make a simple servlet in Eclipse. But including the following libraries generates errors as if they were not defined in Eclipse.
import javax.servlet.*;
import javax.servlet.http.*;
How to have them recognised and defined?

Answer 1

Please add servlet-api.jar in classpath of your project.if you are using tomcat server, then it should be present in ${CATALINA_HOME}/lib

Answer 2

Be sure you are doing the right way:
If you are using the Classic version of Eclipse, then you must donwload the Web Tools Platform.
If you have an Eclipse Java EE Edition, then there is already installed the necessary plugins.
Create a new Dynamic Web Project: Menu New > Project > Dynamic Web Project.
Fill all values you want for the new project.
Do right click on the project and select New Servlet.
Last step creates a new Class file that is a servlet class, already importing the necessary packages, such as javax.servlet.http.*.
If you are using a Eclipse with a Maven plugin installed then, after configured it, you can only add the following dependencies:
http://mvnrepository.com/artifact/javax.servlet/servlet-api/2.5
http://mvnrepository.com/artifact/javax.servlet/jstl/1.2
http://mvnrepository.com/artifact/javax.servlet/jsp-api/2.0
In fact, you can see this tutorial explaining very well all the steps to create a Dynamic Web Prroject using WTP.
Or by ugin Maven, this one and this full explained.
Hope this help...