Login com MVC

Pessoal + uma vez to aqui para encher um pouco voces!!! to fazendo os exercicios da apostila FJ-21 da Caelum
to tentando fazer uma tela de login, mas nao consigo n da erro na minha console mas n roda, acho que to fazendo alguma coisa de errada em validar no banco n sei!!! vo postar minhas classes p vcs verem

Servlet de Login

package br.com.tcc.mvc.logica;

import java.io.IOException;
import java.io.PrintWriter;

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

import br.com.tcc.jdbc.dao.ClienteDAO;
import br.com.tcc.jdbc.modelo.Cliente;

public class Login implements Logica{
	public void executa (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
		
		Cliente cliente = new Cliente();
		PrintWriter out = response.getWriter();
		
		String cpf = request.getParameter("cpf");
		String senha = request.getParameter("senha");
		
		boolean resp;
		ClienteDAO dao = new ClienteDAO();
		resp = dao.existeCliente(cliente);
		
		if (resp == true){
			RequestDispatcher rd = request.getRequestDispatcher("/index.jsp");
			rd.forward(request, response);
			System.out.println("Logado com Sucesso" + cliente.getNome());
		}else{
			RequestDispatcher rd = request.getRequestDispatcher("/login.jsp");
			rd.forward(request, response);
			System.out.println("Erro ao logar" + cliente.getNome());
		}
	}
}

Minha Jsp

<form action="mvc" method="post">
          Cpf: <input type="text" name="cpf" maxlength="11"/><br>
          Senha: <input type="password" name="senha" maxlength="4"/><br>
           <input type="hidden" name="logica" value="Login">
          <input type="submit" value="Ok"/>
</form>

e meu xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	<display-name>TCC</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	

	
	<servlet>
		<servlet-name>servletHome</servlet-name>
		<servlet-class>br.com.tcc.servlet.Home</servlet-class>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>servletHome</servlet-name>
		<url-pattern>/home</url-pattern>
	</servlet-mapping>
			
	<servlet>
		<servlet-name>controlador</servlet-name>
		<servlet-class>br.com.tcc.mvc.servlet.ControllerServlet</servlet-class>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>controlador</servlet-name>
		<url-pattern>/mvc</url-pattern>
	</servlet-mapping>
	
	<error-page>
	<exception-type>java.lang.Exception</exception-type>
	<location>/erro.html</location>
	</error-page>
	
	<error-page>
	<error-code>404</error-code>
	<location>/404.html</location>
	</error-page>
	
</web-app>

Qual a mensagem de erro :?: