diff --git a/library/think/Config.php b/library/think/Config.php
index ed1f1e7b..774a58a4 100644
--- a/library/think/Config.php
+++ b/library/think/Config.php
@@ -177,7 +177,11 @@ class Config
      */
     public static function reset($range = '')
     {
-        $range                          = $range ?: self::$range;
-        true === $range ? self::$config = [] : self::$config[$range] = [];
+        $range = $range ?: self::$range;
+        if (true === $range) {
+            self::$config = [];
+        } else {
+            self::$config[$range] = [];
+        }
     }
 }
diff --git a/library/think/config/driver/Json.php b/library/think/config/driver/Json.php
new file mode 100644
index 00000000..ec2419f9
--- /dev/null
+++ b/library/think/config/driver/Json.php
@@ -0,0 +1,24 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\config\driver;
+
+class Json
+{
+    public function parse($config)
+    {
+        if (is_file($config)) {
+            $config = file_get_contents($config);
+        }
+        $result = json_decode($config, true);
+        return $result;
+    }
+}
diff --git a/library/think/db/Builder.php b/library/think/db/Builder.php
index cf926f63..e9d22eff 100644
--- a/library/think/db/Builder.php
+++ b/library/think/db/Builder.php
@@ -13,6 +13,8 @@ namespace think\db;
 
 use PDO;
 use think\Db;
+use think\db\Connection;
+use think\db\Query;
 use think\Exception;
 
 abstract class Builder
@@ -38,9 +40,9 @@ abstract class Builder
     /**
      * 架构函数
      * @access public
-     * @param \think\db\Connection $connection 数据库连接对象实例
+     * @param Connection $connection 数据库连接对象实例
      */
-    public function __construct($connection)
+    public function __construct(Connection $connection)
     {
         $this->connection = $connection;
     }
@@ -48,10 +50,10 @@ abstract class Builder
     /**
      * 设置当前的Query对象实例
      * @access protected
-     * @param \think\db\Query $query 当前查询对象实例
+     * @param Query $query 当前查询对象实例
      * @return void
      */
-    public function setQuery($query)
+    public function setQuery(Query $query)
     {
         $this->query = $query;
     }
diff --git a/library/think/db/Connection.php b/library/think/db/Connection.php
index b3680d0a..ddcfbe4b 100644
--- a/library/think/db/Connection.php
+++ b/library/think/db/Connection.php
@@ -15,6 +15,7 @@ use PDO;
 use PDOStatement;
 use think\Collection;
 use think\Db;
+use think\db\Query;
 use think\Debug;
 use think\Exception;
 use think\exception\DbBindParamException;
@@ -128,7 +129,7 @@ abstract class Connection
      * 创建指定模型的查询对象
      * @access public
      * @param string $model 模型类名称
-     * @return \think\db\Query
+     * @return Query
      */
     public function model($model)
     {
diff --git a/library/think/model/Relation.php b/library/think/model/Relation.php
index ac88e6a0..03e2a04d 100644
--- a/library/think/model/Relation.php
+++ b/library/think/model/Relation.php
@@ -45,9 +45,9 @@ class Relation
     /**
      * 架构函数
      * @access public
-     * @param \think\Model $model 上级模型对象
+     * @param Model $model 上级模型对象
      */
-    public function __construct($model)
+    public function __construct(Model $model)
     {
         $this->parent = $model;
     }