调试返回结果如下:
array
'id' => string '2' (length=1)
'username' => string 'guoguo' (length=6)
'sex' => string '0' (length=1)

2----2-----2
g----g-----g
0----0-----0

index.html:
<volist name="data" id="vo">
<{$vo.id}>----<{$vo.username}>-----<{$vo.sex}> <br/>
</volist>
indexAction.calss.php:
$Data = M('User'); // 实例化Data数据模型
$this->data = $Data->find(2);
var_dump($this->data);
$this->display();