### TarefasController V2

```java
package br.com.caelum.tarefas.controller;

import java.util.List;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;

import br.com.caelum.tarefas.dao.JdbcTarefaDao;
import br.com.caelum.tarefas.modelo.Tarefa;

@Controller
public class TarefasController {

	private JdbcTarefaDao tarefaDao;

	public TarefasController() {
		this.tarefaDao = new JdbcTarefaDao();
	}


	@RequestMapping("/novaTarefa")
	public String form() {
		return "tarefas/formulario";
	}

	@RequestMapping("adicionaTarefa")
	public String adiciona(@Valid Tarefa tarefa, BindingResult result) {
		if (result.hasFieldErrors("descricao")) {
			return "tarefas/formulario";
		}
		this.tarefaDao.adiciona(tarefa);
		return "tarefas/adicionada";
	}

	@RequestMapping(value = {"listaTarefas", "/"})
	public String lista(Model model) {
		List<Tarefa> tarefas = this.tarefaDao.lista();
		model.addAttribute("tarefas", tarefas);
		return "tarefas/lista";
	}

	@RequestMapping("removeTarefa")
	public String remove(Tarefa tarefa) {
		this.tarefaDao.remove(tarefa);
		return "redirect:listaTarefas";
	}

	@RequestMapping("mostraTarefa")
	public String mostra(Long id, Model model) {
		Tarefa tarefa = this.tarefaDao.buscaPorId(id);
		model.addAttribute("tarefa", tarefa);
		return "tarefas/mostra";
	}

	@RequestMapping("alteraTarefa")
	public String altera(@Valid Tarefa tarefa, BindingResult result) {
		if (result.hasErrors()) {
			return "tarefas/mostra";
		}
		this.tarefaDao.altera(tarefa);
		return "redirect:listaTarefas";
	}

	@RequestMapping("finalizaTarefa")
	public String finaliza(Long id, Model model) {
		this.tarefaDao.finaliza(id);
		model.addAttribute("tarefa", this.tarefaDao.buscaPorId(id));
		return "tarefas/finalizada";
	}
}
```