PHP 数据收集器引擎致命错误

我正在尝试用PHP编写一个小引擎来处理数据，但我不断收到此错误：

Fatal error: Class 'Factory'dataHandler' not found in /Applications/MAMP/htdocs/Imperial/lp/php/dataPhraserController.php on line 12

现在一直在试图找到解决问题的方法，但不是运气.....

我的代码：

数据工厂.php

    <?php
namespace Factory;
class dataHandler{
    protected $firstName;
    protected $lastName;
    protected $email;
    protected $confirmEmail;
    protected $phoneNumber;
    public function setFirstName($firstName)
    {
        $this->firstName = $firstName;
    }
    public function setLastName($lastName)
    {
        $this->lastName = $lastName;
    }
    public function setEmail($email)
    {
        $this->email = $email;
    }
    public function setConfirmEmail($confirmEmail)
    {
        $this->confirmEmail = $confirmEmail;
    }
    public function setPhoneNumber($phoneNumber)
    {
        $this->phoneNumber = $phoneNumber;
    }
    public function getFirstName()
    {
        var_dump($this->firstName);
    }
    public function getLastName()
    {
        return $this->lastName;
    }
    public function getEmail()
    {
        return $this->confirmEmail;
    }
    public function getPhoneNumber()
    {
        return $this->phoneNumber;
    }
}

dataPharserController.php：

<?php
namespace PhraserController;
use Factory'dataHandler;
class DataPhraser
{
    private $object;
    public function __construct()
    {
        $this->object = new dataHandler;
    }
    public function pharseFirstName()
    {
        if(!isset($_POST['first_name']))
        {
            $this->object->setFirstName($firstName = null);
            var_dump($_POST['first_name']);
        }else{
            $this->object->setFirstName($firstName = $_POST['first_name']);
        }
    }
}
$test = new DataPhraser();
$test->pharseFirstName();

这个想法是从提交的html表单中收集数据，有人可以帮助我吗..