Jsf - url amigável redirecionada a um certo objeto

package br.com.techsquare.controller;

//omitido os imports do meu projeto
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.primefaces.event.FileUploadEvent;

/**
 *
 * @author Alan
 */
@ManagedBean
@SessionScoped
public class PostController extends HttpServlet {

    private Post post;
    private PostDAO dao = new PostDAOImp();
    private Mensagens msg = new Mensagens();
    private List<Categoria> categorias;
    private List<Post> posts;
    private CategoriaDAO catDao = new CategoriaDAOImp();
    private PostDAO postDao = new PostDAOImp();

    public PostController() {
        long t1 = System.currentTimeMillis();
        try {
            if (post == null) {
                post = new Post();
            }
            if (categorias == null) {
                categorias = new ArrayList<Categoria>();
                categorias = catDao.list();
            }
            if (posts == null) {
                posts = new ArrayList<Post>();
                posts = postDao.list();
            }
        } catch (Exception e) {
            msg.enviar(msg.ERRO_SISTEMA);
        }
        long t2 = System.currentTimeMillis();
        System.out.println("PostController - construtor: " + (t2 - t1));
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws IOException, ServletException {
        String titulo = request.getParameter("titulo");
        System.out.println("entro no doGet com o titul: " + titulo);
        if(titulo != null || titulo != ""){
            post = new Post();
            post = dao.getPostsTitulo(titulo);
            System.out.println("pego o post");
            PostController pc = new PostController();
            pc.setPost(post);
            System.out.println("nome do post: " + post.getTitulo());
        }
        response.sendRedirect("/abre-post.xhtml");
    }

    public String enviarPost() {
        post = new Post();
        return "enviar-post.xhtml";
    }

    public String verPost(Post post) {
        long t1 = System.currentTimeMillis();
        try {
            this.post = dao.getPostId(post.getId());
            int cliques = post.getCliques();
            post.setCliques(cliques + 1);
            dao.update(post);
        } catch (Exception e) {
        }
        long t2 = System.currentTimeMillis();
        System.out.println("PostController - verPost: " + (t2 - t1));
        return "abre-post.xhtml";
    }


    public void salvarPost() {
        try {
            UsuarioController uc = new UsuarioController();
            post.setUsuario(uc.getUsuario());
            post.setDtcadastro(new Date());
            dao.save(post);
            msg.enviar(msg.POST_OK);
            post = new Post();
         } catch (Exception e) {
            msg.enviar(msg.ERRO_SISTEMA);
        }
    }

//getters and setters omitidos
}