如果查看Zend \ Db \ Adapter \
AdapterServiceFactory，您会看到适配器配置仅指向一个键'db'。这意味着它构建的适配器将始终使用此（唯一）配置密钥。

我建议您创建自己的工厂，如下所示：

namespace Your\Namespace;

use Zend\ServiceManager\FactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
use Zend\Db\Adapter\Adapter;

class MyAdapterFactory implements FactoryInterface
{

  protected $configKey;

  public function __construct($key)
  {
      $this->configKey = $key;
  }

  public function createService(ServiceLocatorInterface $serviceLocator)
  {
      $config = $serviceLocator->get('Config');
      return new Adapter($config[$this->configKey]);
  }
}

在您的主模块（或任何其他模块）中，将以下内容添加到Module.php文件中，以将适配器工厂声明为Zend Service Manager：

use Your\Namespace\MyAdapterFactory;
use Zend\ModuleManager\Feature\ServiceProviderInterface;

class Module implements ServiceProviderInterface{

//Previous code

public function getServiceConfig()
{
    return array(
        'factories' => array(
            'myadapter1'        => new MyAdapterFactory('dbconfigkey1'),
            'myadapter2'        => new MyAdapterFactory('dbconfigkey2'),
            ),
       );

}

//...

现在，全局配置应如下所示：

return array(
'dbconfigkey1' => array(
    'driver'         => 'Pdo',
    'dsn'            => 'mysql:dbname=my_db;host=localhost',
    'driver_options' => array(
        PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\''
    ),
    'username' => 'user',
    'password' => '******',
),

'dbconfigkey2' => array(
    'driver'         => 'Pdo',
    'dsn'            => 'mysql:dbname=my_db2;host=localhost',
    'driver_options' => array(
        PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\''
    ),
    'username' => 'user',
    'password' => '******',
),

);

要使用适配器，您需要使用服务管理器来调用它们：

$adapter1=$serviceManager->get('myadapter1');
$adapter2=$serviceManager->get('myadapter2');

从2.2版开始

现在，抽象服务工厂已成为zf2 Zend \ Db模块的一部分。可以在“ adapters”子键下添加多个配置键：

'db'=> array(
    'adapters'=>array(
        'adapter' => array(
            'driver'         => 'Pdo',
            'dsn'            => 'mysql:dbname=test;host=localhost',
            'username' => 'readCredential',
            'password' => '****'
        ),
        'adapter2' => array(
            'driver'         => 'Pdo',
            'dsn'            => 'mysql:dbname=test;host=localhost',
            'username' => 'rwCredential',
            'password' => '****'
        ),
    )
),

但是，需要“手动”添加AbstractServiceFactory，因为默认情况下并非如此：

'service_manager' => array(
    'abstract_factories' => array(
            'Zend\Db\Adapter\AdapterAbstractServiceFactory',
    )
),

可以像以前一样访问适配器：

$adapter1=$serviceManager->get('adapter');
$adapter2=$serviceManager->get('adapter2');

从性能角度来看，第二种方法更好：将实例化一个对象（抽象工厂）以（可能）创建不同的适配器。而在以前的方法中，每个配置创建一个对象。