import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
public class SessionExampleServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
HttpSession session = request.getSession();
session.setAttribute("username", "John");
String username = (String) session.getAttribute("username");
response.getWriter().println("Username: " + username);
}
}
