diff --git a/library/think/Cache.php b/library/think/Cache.php
index fd011d5d..3695cd12 100644
--- a/library/think/Cache.php
+++ b/library/think/Cache.php
@@ -41,7 +41,7 @@ class Cache
         }
 
         if (true === $name || !isset(self::$instance[$name])) {
-            $class = (!empty($options['namespace']) ? $options['namespace'] : '\\think\\cache\\driver\\') . ucwords($type);
+            $class = strpos($type, '\\') ? $type : '\\think\\cache\\driver\\' . ucwords($type);
 
             // 记录初始化信息
             App::$debug && Log::record('[ CACHE ] INIT ' . $type . ':' . var_export($options, true), 'info');
diff --git a/library/think/Config.php b/library/think/Config.php
index c998e4d6..ecae1378 100644
--- a/library/think/Config.php
+++ b/library/think/Config.php
@@ -42,7 +42,7 @@ class Config
         if (empty($type)) {
             $type = pathinfo($config, PATHINFO_EXTENSION);
         }
-        $class = (false === strpos($type, '\\')) ? '\\think\\config\\driver\\' . ucwords($type) : $type;
+        $class = strpos($type, '\\') ? $type : '\\think\\config\\driver\\' . ucwords($type);
         self::set((new $class())->parse($config), $name, $range);
     }
 
diff --git a/library/think/Db.php b/library/think/Db.php
index be219898..0acae8f5 100644
--- a/library/think/Db.php
+++ b/library/think/Db.php
@@ -67,7 +67,7 @@ class Db
             if (empty($options['type'])) {
                 throw new \InvalidArgumentException('Underfined db type');
             }
-            $class = (!empty($options['namespace']) ? $options['namespace'] : '\\think\\db\\connector\\') . ucwords($options['type']);
+            $class = strpos($options['type'], '\\') ? $options['type'] : '\\think\\db\\connector\\' . ucwords($options['type']);
             // 记录初始化信息
             App::$debug && Log::record('[ DB ] INIT ' . $options['type'] . ':' . var_export($options, true), 'info');
             if (true === $name) {
diff --git a/library/think/Log.php b/library/think/Log.php
index 709da31e..9404f614 100644
--- a/library/think/Log.php
+++ b/library/think/Log.php
@@ -42,7 +42,7 @@ class Log
     public static function init($config = [])
     {
         $type         = isset($config['type']) ? $config['type'] : 'File';
-        $class        = (!empty($config['namespace']) ? $config['namespace'] : '\\think\\log\\driver\\') . ucwords($type);
+        $class        = strpos($type, '\\') ? $type :  '\\think\\log\\driver\\' . ucwords($type);
         self::$config = $config;
         unset($config['type']);
         self::$driver = new $class($config);
@@ -57,7 +57,7 @@ class Log
     public static function alarm($config = [])
     {
         $type  = isset($config['type']) ? $config['type'] : 'Email';
-        $class = (!empty($config['namespace']) ? $config['namespace'] : '\\think\\log\\alarm\\') . ucwords($type);
+        $class = strpos($type, '\\') ? $type : '\\think\\log\\alarm\\' . ucwords($type);
         unset($config['type']);
         self::$alarm = new $class($config['alarm']);
         // 记录初始化信息
diff --git a/library/think/Response.php b/library/think/Response.php
index 9507b698..72218758 100644
--- a/library/think/Response.php
+++ b/library/think/Response.php
@@ -77,7 +77,7 @@ class Response
         $type = empty($type) ? 'null' : strtolower($type);
 
         if (!isset(self::$instance[$type])) {
-            $class = (isset($options['namespace']) ? $options['namespace'] : '\\think\\response\\') . ucfirst($type);
+            $class = strpos($type, '\\') ? $type : '\\think\\response\\' . ucfirst($type);
             if (class_exists($class)) {
                 $response = new $class($data, $type, $options);
             } else {
diff --git a/library/think/Session.php b/library/think/Session.php
index ade2a917..c2d8fab0 100644
--- a/library/think/Session.php
+++ b/library/think/Session.php
@@ -89,7 +89,7 @@ class Session
         }
         if (!empty($config['type'])) {
             // 读取session驱动
-            $class = (!empty($config['namespace']) ? $config['namespace'] : '\\think\\session\\driver\\') . ucwords($config['type']);
+            $class = strpos($config['type'], '\\') ? $config['type'] :  '\\think\\session\\driver\\' . ucwords($config['type']);
 
             // 检查驱动类
             if (!class_exists($class) || !session_set_save_handler(new $class($config))) {
diff --git a/library/think/Template.php b/library/think/Template.php
index 36654aeb..55ae8649 100644
--- a/library/think/Template.php
+++ b/library/think/Template.php
@@ -49,7 +49,6 @@ class Template
         'cache_id'           => '', // 模板缓存ID
         'tpl_replace_string' => [],
         'tpl_var_identify'   => 'array', // .语法变量识别，array|object|'', 为空时自动识别
-        'namespace'          => '\\think\\template\\driver\\',
     ];
 
     private $literal     = [];
@@ -71,7 +70,7 @@ class Template
 
         // 初始化模板编译存储器
         $type          = $this->config['compile_type'] ? $this->config['compile_type'] : 'File';
-        $class         = $this->config['namespace'] . ucwords($type);
+        $class         = strpos($type, '\\') ? $type : '\\think\\template\\driver\\' . ucwords($type);
         $this->storage = new $class();
     }
 
diff --git a/library/think/View.php b/library/think/View.php
index 84f2e428..e72e77c2 100644
--- a/library/think/View.php
+++ b/library/think/View.php
@@ -83,7 +83,7 @@ class View
             $type = !empty($options['type']) ? $options['type'] : 'Think';
         }
 
-        $class = (!empty($options['namespace']) ? $options['namespace'] : '\\think\\view\\driver\\') . ucfirst($type);
+        $class = strpos($type, '\\') ? $type : '\\think\\view\\driver\\' . ucfirst($type);
         if (isset($options['type'])) {
             unset($options['type']);
         }
diff --git a/library/think/db/Connection.php b/library/think/db/Connection.php
index 6fc5b777..089027c0 100644
--- a/library/think/db/Connection.php
+++ b/library/think/db/Connection.php
@@ -284,7 +284,7 @@ abstract class Connection
         if ($this->linkID) {
             return $this->linkID->getAttribute(PDO::ATTR_DRIVER_NAME);
         } else {
-            return $this->config['type'];
+            return basename(str_replace('\\', '/', $this->config['type']));
         }
     }
 
diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index ae315771..17cafea9 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -960,7 +960,7 @@ class Query
     {
         $config   = array_merge(Config::get('paginate'), $config);
         $listRows = $listRows ?: $config['list_rows'];
-        $class    = (!empty($config['namespace']) ? $config['namespace'] : '\\think\\paginator\\driver\\') . ucwords($config['type']);
+        $class    = strpos($config['type'], '\\') ? $config['type'] : '\\think\\paginator\\driver\\') . ucwords($config['type']);
         $page     = isset($config['page']) ? (int) $config['page'] : call_user_func([
             $class,
             'getCurrentPage',
diff --git a/tests/thinkphp/library/think/sessionTest.php b/tests/thinkphp/library/think/sessionTest.php
index 8c3c2d53..76c18ef0 100644
--- a/tests/thinkphp/library/think/sessionTest.php
+++ b/tests/thinkphp/library/think/sessionTest.php
@@ -156,8 +156,7 @@ class sessionTest extends \PHPUnit_Framework_TestCase
             'use_cookies'    => '1',
             'cache_limiter'  => '60',
             'cache_expire'   => '60',
-            'type'           => 'memcache', //
-            'namespace'      => '\\think\\session\\driver\\', // ?
+            'type'           => '\\think\\session\\driver\\Memcache', //
             'auto_start'     => '1',
         ];