"Página não encontrada" - Não consigo acessar página via servlet

Eduardo Benevides · June 4, 2018

Olá pessoal, estou revisando o material do curso fj-21 da caelum e me deparei com erro que não consigo resolver.

Eu possuo uma interface:

package br.com.caelum.mvc.logica;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public interface Logica {
    String executa(HttpServletRequest request, HttpServletResponse response)throws Exception;
}

e a implemento:

package br.com.caelum.mvc.logica;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class PrimeiraLogica implements Logica{
    public String executa(HttpServletRequest request, HttpServletResponse response)throws Exception{
        return "primeira-logica.jsp";
        
    }
}

Depois tenho a classe Controller:

package br.com.caelum.mvc.servlet;

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;

import br.com.caelum.mvc.logica.Logica;

@WebServlet
public class ControllerServlet extends HttpServlet{
    protected void service(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
        String parametro=request.getParameter("logica");
        String nomeDaClasse="br.com.caelum.mvc.logica." + parametro;
        
        try {
            Class classe = Class.forName(nomeDaClasse);
            Logica logica =(Logica) classe.newInstance();
            String pagina=logica.executa(request, response);
            request.getRequestDispatcher(pagina).forward(request, response);
            
        }catch(Exception e) {
            throw new ServletException("A lógica de negocios causou uma exceção",e);
        }
        
    }
}

E a minha página .jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <h1>Primeria Lógica</h1>
</body>
</html>