<bean id="mysqlDataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost/fj21" />
    <property name="username" value="root"/>
    <property name="password" value="root"/>
</bean>

@Controller

private final JdbcTarefaDAO dao;

@Autowired
public TarefasController(JdbcTarefaDAO dao) {
    this.dao = dao;
}

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

@Repository

private Connection connection;

@Autowired
public JdbcTarefaDAO(DataSource dataSource) {
    try {
        this.connection = dataSource.getConnection();
    }
    catch(SQLException e) {
        new RuntimeException(e);
    }
}

GRAVE: Context initialization failed