Blog: Create Maven Project with Servlet in IntelliJ IDEA 2018

DemoServlet.java

@WebServlet("/DemoServlet")
public class DemoServlet extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("<h3>Hello World!</h3>");
    }
}