Zend framework2 Zend Framework 2：如何使用Abtract模型扩展模型？

我有一个具有以下结构的项目：

这是我的AbstractTable.php：

namespace AdminManage\Model;
use Zend\Db\Adapter\Adapter;
use Zend\ServiceManager\ServiceLocatorInterface;
class AbstractTable{
protected $tablegateway;
protected $table;
protected $serviceLocator;
protected $adapter;

public function __construct(TableGateway $tableGateway) {
    $this->tableGateway = $tableGateway;
    $this->table = $this->tableGateway->getTable();
}

public function setServiceLocator(ServiceLocatorInterface $serviceLocator){
    $this->serviceLocator = $serviceLocator;
    return $this;
}

public function getServiceLocator(){
    return $this->serviceLocator;
}

public function setDbAdapter(Adapter $adapter){
    $this->adapter = $adapter;
    return $this;
}
public function getDbAdapter(){
    return $this->adapter;
}

public function fetchAll(){
    return $this->tablegateway->select();
}

public function getTable(){
    if(!$this->table)
        $this->table = $this->tableGateway->getTable();
    return $this->table;
}
}

namespace Category\Model;
use Zend\Db\Sql\Sql;
use AdminManage\Model\AbstractTable;
class CategoryTable extends AbstractTable {
public function getListCategory() {
    $adapter = $this->getDbAdapter ();
    $sql = new Sql ( $adapter );
    $select = $sql->select ( array (
            "c" => "category" 
    ) )->join ( array (
            "cd" => "category_description" 
    ), "c.category_id = cd.category_id" );
    echo $sql->prepareStatementForSqlObject ( $select )->getSql ();
}
}

这是我的CategoryTable.php：

namespace AdminManage\Model;
use Zend\Db\Adapter\Adapter;
use Zend\ServiceManager\ServiceLocatorInterface;
class AbstractTable{
protected $tablegateway;
protected $table;
protected $serviceLocator;
protected $adapter;

public function __construct(TableGateway $tableGateway) {
    $this->tableGateway = $tableGateway;
    $this->table = $this->tableGateway->getTable();
}

public function setServiceLocator(ServiceLocatorInterface $serviceLocator){
    $this->serviceLocator = $serviceLocator;
    return $this;
}

public function getServiceLocator(){
    return $this->serviceLocator;
}

public function setDbAdapter(Adapter $adapter){
    $this->adapter = $adapter;
    return $this;
}
public function getDbAdapter(){
    return $this->adapter;
}

public function fetchAll(){
    return $this->tablegateway->select();
}

public function getTable(){
    if(!$this->table)
        $this->table = $this->tableGateway->getTable();
    return $this->table;
}
}

namespace Category\Model;
use Zend\Db\Sql\Sql;
use AdminManage\Model\AbstractTable;
class CategoryTable extends AbstractTable {
public function getListCategory() {
    $adapter = $this->getDbAdapter ();
    $sql = new Sql ( $adapter );
    $select = $sql->select ( array (
            "c" => "category" 
    ) )->join ( array (
            "cd" => "category_description" 
    ), "c.category_id = cd.category_id" );
    echo $sql->prepareStatementForSqlObject ( $select )->getSql ();
}
}

在控制器中调用getListCategory（）时，出现错误：

Fatal error: Class 'AdminManage\Model\AbstractTable' not found in D:\xampp\htdocs\dokusyu\htdocs\admin\dokusyu_be\module\Course\src\Category\Model\CategoryTable.php on line 5.

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如何修复此错误？谢谢大家!

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