AppServlet.java

package app;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("")
public class AppServlet extends HttpServlet {
	
	@Override
	protected void doGet(HttpServletRequest requisicao, HttpServletResponse resposta) throws ServletException, IOException {
		
		resposta.getWriter().print("Olá Mundo!");
		
	}

}