diff --git a/src/AlipayApp/App/Params/Pay/BusinessParams.php b/src/AlipayApp/App/Params/Pay/BusinessParams.php
index 157add8..ec9dc65 100644
--- a/src/AlipayApp/App/Params/Pay/BusinessParams.php
+++ b/src/AlipayApp/App/Params/Pay/BusinessParams.php
@@ -96,7 +96,7 @@ class BusinessParams
 
 	/**
 	 * 外部指定买家
-	 * @var [type]
+	 * @var array
 	 */
 	public $ext_user_info;
 
@@ -108,7 +108,7 @@ public function __construct()
 	public function toString()
 	{
 		$obj = (array)$this;
-		$result = $obj['extend_params']->toString();
+		$result = $obj['extend_params']->toArray();
 		if(null === $result)
 		{
 			unset($obj['extend_params']);
diff --git a/src/AlipayApp/App/Params/Pay/ExtendParams.php b/src/AlipayApp/App/Params/Pay/ExtendParams.php
index febc92f..50f801b 100644
--- a/src/AlipayApp/App/Params/Pay/ExtendParams.php
+++ b/src/AlipayApp/App/Params/Pay/ExtendParams.php
@@ -1,17 +1,11 @@
 <?php
 namespace Yurun\PaySDK\AlipayApp\App\Params\Pay;
 
-use \Yurun\PaySDK\Traits\JSONParams;
-
 /**
  * 支付宝手机支付下单扩展参数类
  */
 class ExtendParams
 {
-	use JSONParams{
-		toString as private traitToString;
-	}
-
 	/**
 	 * 系统商编号，该参数作为系统商返佣数据提取的依据，请填写系统商签约协议的PID
 	 * @var string
@@ -45,12 +39,12 @@ class ExtendParams
 	 */
 	public $hb_fq_seller_percent;
 
-	public function toString()
+	public function toArray()
 	{
 		if(null === $this->sys_service_provider_id && null === $this->hb_fq_num && null === $this->hb_fq_seller_percent && null === $this->needBuyerRealnamed && null === $this->TRANS_MEMO)
 		{
 			return null;
 		}
-		return $this->traitToString();
+		return (array)$this;
 	}
 }
\ No newline at end of file
diff --git a/src/AlipayApp/FTF/Params/ExtendParams.php b/src/AlipayApp/FTF/Params/ExtendParams.php
index d6a3cf3..8ea99ff 100644
--- a/src/AlipayApp/FTF/Params/ExtendParams.php
+++ b/src/AlipayApp/FTF/Params/ExtendParams.php
@@ -1,29 +1,23 @@
 <?php
 namespace Yurun\PaySDK\AlipayApp\FTF\Params;
 
-use \Yurun\PaySDK\Traits\JSONParams;
-
 /**
  * 支付宝当面付扩展参数
  */
 class ExtendParams
 {
-	use JSONParams{
-		toString as private traitToString;
-	}
-
 	/**
 	 * 系统商编号，该参数作为系统商返佣数据提取的依据，请填写系统商签约协议的PID
 	 * @var string
 	 */
 	public $sys_service_provider_id;
 
-	public function toString()
+	public function toArray()
 	{
 		if(null === $this->sys_service_provider_id)
 		{
 			return null;
 		}
-		return $this->traitToString();
+		return (array)$this;
 	}
 }
\ No newline at end of file
diff --git a/src/AlipayApp/FTF/Params/Pay/BusinessParams.php b/src/AlipayApp/FTF/Params/Pay/BusinessParams.php
index 707f956..a71d52d 100644
--- a/src/AlipayApp/FTF/Params/Pay/BusinessParams.php
+++ b/src/AlipayApp/FTF/Params/Pay/BusinessParams.php
@@ -126,7 +126,7 @@ public function toString()
 		{
 			$obj['goods_detail'] = json_encode($obj['goods_detail']);
 		}
-		$result = $obj['extend_params']->toString();
+		$result = $obj['extend_params']->toArray();
 		if(null === $result)
 		{
 			unset($obj['extend_params']);
diff --git a/src/AlipayApp/FTF/Params/QR/BusinessParams.php b/src/AlipayApp/FTF/Params/QR/BusinessParams.php
index 7552816..81f63ef 100644
--- a/src/AlipayApp/FTF/Params/QR/BusinessParams.php
+++ b/src/AlipayApp/FTF/Params/QR/BusinessParams.php
@@ -100,7 +100,7 @@ public function toString()
 		{
 			$obj['goods_detail'] = json_encode($obj['goods_detail']);
 		}
-		$result = $obj['extend_params']->toString();
+		$result = $obj['extend_params']->toArray();
 		if(null === $result)
 		{
 			unset($obj['extend_params']);
diff --git a/src/AlipayApp/MiniApp/Params/Pay/BusinessParams.php b/src/AlipayApp/MiniApp/Params/Pay/BusinessParams.php
index 78090c3..42b67a4 100644
--- a/src/AlipayApp/MiniApp/Params/Pay/BusinessParams.php
+++ b/src/AlipayApp/MiniApp/Params/Pay/BusinessParams.php
@@ -136,7 +136,7 @@ public function __construct()
 	public function toString()
 	{
 		$obj = (array)$this;
-		$result = $obj['extend_params']->toString();
+		$result = $obj['extend_params']->toArray();
 		if(null === $result)
 		{
 			unset($obj['extend_params']);
diff --git a/src/AlipayApp/MiniApp/Params/Pay/ExtendParams.php b/src/AlipayApp/MiniApp/Params/Pay/ExtendParams.php
index 34aa884..d167652 100644
--- a/src/AlipayApp/MiniApp/Params/Pay/ExtendParams.php
+++ b/src/AlipayApp/MiniApp/Params/Pay/ExtendParams.php
@@ -1,17 +1,11 @@
 <?php
 namespace Yurun\PaySDK\AlipayApp\MiniApp\Params\Pay;
 
-use \Yurun\PaySDK\Traits\JSONParams;
-
 /**
  * 业务扩展参数
  */
 class ExtendParams
 {
-	use JSONParams{
-		toString as private traitToString;
-	}
-
 	/**
 	 * 系统商编号，该参数作为系统商返佣数据提取的依据，请填写系统商签约协议的PID
 	 * @var string
@@ -25,12 +19,12 @@ class ExtendParams
 	 */
 	public $card_type;
 
-	public function toString()
+	public function toArray()
 	{
 		if(null === $this->sys_service_provider_id && null === $this->card_type)
 		{
 			return null;
 		}
-		return $this->traitToString();
+		return (array)$this;
 	}
 }
\ No newline at end of file
diff --git a/src/AlipayApp/Page/Params/GoodsDetail.php b/src/AlipayApp/Page/Params/GoodsDetail.php
index 48045f5..c90c20d 100644
--- a/src/AlipayApp/Page/Params/GoodsDetail.php
+++ b/src/AlipayApp/Page/Params/GoodsDetail.php
@@ -1,29 +1,23 @@
 <?php
 namespace Yurun\PaySDK\AlipayApp\Page\Params;
 
-use \Yurun\PaySDK\Traits\JSONParams;
-
 /**
  * 支付宝PC场景下单并支付商品详情类
  */
 class GoodsDetail
 {
-	use JSONParams{
-		toString as private traitToString;
-	}
-
 	/**
 	 * 在支付时，可点击商品名称跳转到该地址
 	 * @var string
 	 */
 	public $show_url;
 
-	public function toString()
+	public function toArray()
 	{
 		if(null === $this->show_url)
 		{
 			return null;
 		}
-		return $this->traitToString();
+		return (array)$this;
 	}
 }
\ No newline at end of file
diff --git a/src/AlipayApp/Page/Params/Pay/BusinessParams.php b/src/AlipayApp/Page/Params/Pay/BusinessParams.php
index 6ed7cf3..767e2a8 100644
--- a/src/AlipayApp/Page/Params/Pay/BusinessParams.php
+++ b/src/AlipayApp/Page/Params/Pay/BusinessParams.php
@@ -123,7 +123,7 @@ public function __construct()
 	public function toString()
 	{
 		$obj = (array)$this;
-		$result = $obj['goods_detail']->toString();
+		$result = $obj['goods_detail']->toArray();
 		if(null === $result)
 		{
 			unset($obj['goods_detail']);
@@ -132,7 +132,7 @@ public function toString()
 		{
 			$obj['goods_detail'] = $result;
 		}
-		$result = $obj['extend_params']->toString();
+		$result = $obj['extend_params']->toArray();
 		if(null === $result)
 		{
 			unset($obj['extend_params']);
diff --git a/src/AlipayApp/Page/Params/Pay/ExtendParams.php b/src/AlipayApp/Page/Params/Pay/ExtendParams.php
index 9c6004f..3b7632b 100644
--- a/src/AlipayApp/Page/Params/Pay/ExtendParams.php
+++ b/src/AlipayApp/Page/Params/Pay/ExtendParams.php
@@ -1,17 +1,11 @@
 <?php
 namespace Yurun\PaySDK\AlipayApp\Page\Params\Pay;
 
-use \Yurun\PaySDK\Traits\JSONParams;
-
 /**
  * 支付宝PC场景下单并支付扩展参数类
  */
 class ExtendParams
 {
-	use JSONParams{
-		toString as private traitToString;
-	}
-
 	/**
 	 * 系统商编号，该参数作为系统商返佣数据提取的依据，请填写系统商签约协议的PID
 	 * @var string
@@ -30,12 +24,12 @@ class ExtendParams
 	 */
 	public $hb_fq_seller_percent;
 
-	public function toString()
+	public function toArray()
 	{
 		if(null === $this->sys_service_provider_id && null === $this->hb_fq_num && null === $this->hb_fq_seller_percent)
 		{
 			return null;
 		}
-		return $this->traitToString();
+		return (array)$this;
 	}
 }
\ No newline at end of file
diff --git a/src/AlipayApp/Wap/Params/Pay/BusinessParams.php b/src/AlipayApp/Wap/Params/Pay/BusinessParams.php
index 269423c..06c2237 100644
--- a/src/AlipayApp/Wap/Params/Pay/BusinessParams.php
+++ b/src/AlipayApp/Wap/Params/Pay/BusinessParams.php
@@ -121,7 +121,7 @@ public function __construct()
 	public function toString()
 	{
 		$obj = (array)$this;
-		$result = $obj['extend_params']->toString();
+		$result = $obj['extend_params']->toArray();
 		if(null === $result)
 		{
 			unset($obj['extend_params']);
diff --git a/src/AlipayApp/Wap/Params/Pay/ExtendParams.php b/src/AlipayApp/Wap/Params/Pay/ExtendParams.php
index 400b446..3a80bb2 100644
--- a/src/AlipayApp/Wap/Params/Pay/ExtendParams.php
+++ b/src/AlipayApp/Wap/Params/Pay/ExtendParams.php
@@ -1,17 +1,11 @@
 <?php
 namespace Yurun\PaySDK\AlipayApp\Wap\Params\Pay;
 
-use \Yurun\PaySDK\Traits\JSONParams;
-
 /**
  * 支付宝手机支付下单扩展参数类
  */
 class ExtendParams
 {
-	use JSONParams{
-		toString as private traitToString;
-	}
-
 	/**
 	 * 系统商编号，该参数作为系统商返佣数据提取的依据，请填写系统商签约协议的PID
 	 * @var string
@@ -45,12 +39,12 @@ class ExtendParams
 	 */
 	public $hb_fq_seller_percent;
 
-	public function toString()
+	public function toArray()
 	{
 		if(null === $this->sys_service_provider_id && null === $this->hb_fq_num && null === $this->hb_fq_seller_percent && null === $this->needBuyerRealnamed && null === $this->TRANS_MEMO)
 		{
 			return null;
 		}
-		return $this->traitToString();
+		return (array)$this;
 	}
 }
\ No newline at end of file