diff --git a/Library/Think/Transform.php b/Library/Think/Transform.php
index e41738ff..4527f1f1 100644
--- a/Library/Think/Transform.php
+++ b/Library/Think/Transform.php
@@ -22,7 +22,7 @@ class Transform {
      * @param  string $type 驱动类型
      */
     static private function init($type){
-    	if(!isset(self::$handler[$type])) {
+        if(!isset(self::$handler[$type])) {
             $class = '\\Think\\Transform\\Driver\\' . ucwords($type);
             self::$handler[$type] = new $class();
         }
@@ -34,11 +34,12 @@ class Transform {
      * @access public
      * @param  mixed  $content 要编码的数据
      * @param  string $type    数据类型
+     * @param  array  $config  XML配置参数，JSON格式生成无此参数
      * @return string          编码后的数据
      */
-    static public function encode($content, $type){
+    static public function encode($content, $type, array $config = []){
         self::init($type);
-        return self::$handler[$type]->encode($content);
+        return self::$handler[$type]->encode($content, $config);
     }
 
     /**
@@ -46,23 +47,31 @@ class Transform {
      * @param  string  $content 要解码的数据
      * @param  string  $type    数据类型
      * @param  boolean $assoc   是否返回数组
+     * @param  array   $config  XML配置参数，JSON格式解码无此参数
      * @return mixed            解码后的数据
      */
-    static public function decode($content, $type, $assoc = true){
-    	self::init($type);
-    	return self::$handler[$type]->decode($content, $assoc);
+    static public function decode($content, $type, $assoc = true, array $config = []){
+        self::init($type);
+        return self::$handler[$type]->decode($content, $assoc, $config);
     }
 
     // 调用驱动类的方法
     // Transform::xmlEncode('abc')
     // Transform::jsonDecode('abc', true);
-	static public function __callStatic($method, $params){
-		$type   = substr($method, 0, strlen($method) - 6);
-		$method = strtolower(substr($method, -6));
-		$assoc  = empty($params[2]) ? true : false;
-        if(!in_array($method, ['encode', 'decode'])){
-            throw new Think\Exception("call to undefined method {$method}");
+    static public function __callStatic($method, $params){
+        $type   = substr($method, 0, strlen($method) - 6);
+        $method = strtolower(substr($method, -6));
+
+        switch ($method) {
+            case 'encode':
+                $config = empty($params[1]) ? []   : $params[1];
+                return self::encode($params[0], $type, $config);
+            case 'decode':
+                $assoc  = empty($params[1]) ? true : $params[1];
+                $config = empty($params[2]) ? []   : $params[2];
+                return self::decode($params[0], $type, $assoc, $config);
+            default:
+                throw new Exception("call to undefined method {$method}");
         }
-        return self::$method($params[0], $type, $assoc);
-	}
+    }
 }