AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do","app_id","your private_key","json","GBK","alipay_public_key","RSA2");
AlipayOpenAuthTokenAppRequest request = new AlipayOpenAuthTokenAppRequest();
request.setBizContent("{" +
"\"grant_type\":\"authorization_code或者refresh_token\"," +
"\"code\":\"1cc19911172e4f8aaa509c8fb5d12F56\"," +
"\"refresh_token\":\"201509BBdcba1e3347de4e75ba3fed2c9abebE36\"" +
"  }");
AlipayOpenAuthTokenAppResponse response = alipayClient.execute(request);
if(response.isSuccess()){
System.out.println("调用成功");
} else {
System.out.println("调用失败");
}

IAopClient client = new DefaultAopClient("https://openapi.alipay.com/gateway.do", "app_id", "merchant_private_key", "json", "1.0", "RSA2", "alipay_public_key", "GBK", false);
AlipayOpenAuthTokenAppRequest  request= new AlipayOpenAuthTokenAppRequest() ;
request.BizContent="{" +
"\"grant_type\":\"authorization_code或者refresh_token\"," +
"\"code\":\"1cc19911172e4f8aaa509c8fb5d12F56\"," +
"\"refresh_token\":\"201509BBdcba1e3347de4e75ba3fed2c9abebE36\"" +
"  }";
AlipayOpenAuthTokenAppResponse response=client.Execute(request);
Console.WriteLine(response.Body);

$aop = new AopClient ();
$aop->gatewayUrl = 'https://openapi.alipay.com/gateway.do';
$aop->appId = 'your app_id';
$aop->rsaPrivateKey = '请填写开发者私钥去头去尾去回车，一行字符串';
$aop->alipayrsaPublicKey='请填写支付宝公钥，一行字符串';
$aop->apiVersion = '1.0';
$aop->signType = 'RSA2';
$aop->postCharset='GBK';
$aop->format='json';
$request = new AlipayOpenAuthTokenAppRequest ();
$request->setBizContent("{" .
"\"grant_type\":\"authorization_code或者refresh_token\"," .
"\"code\":\"1cc19911172e4f8aaa509c8fb5d12F56\"," .
"\"refresh_token\":\"201509BBdcba1e3347de4e75ba3fed2c9abebE36\"" .
"  }");
$result = $aop->execute ( $request); 

$responseNode = str_replace(".", "_", $request->getApiMethodName()) . "_response";
$resultCode = $result->$responseNode->code;
if(!empty($resultCode)&&$resultCode == 10000){
echo "成功";
} else {
echo "失败";
}

https://openapi.alipay.com/gateway.do?timestamp=2013-01-01 08:08:08&method=alipay.open.auth.token.app&app_id=1807&sign_type=RSA2&sign=ERITJKEIJKJHKKKKKKKHJEREEEEEEEEEEE&version=1.0&biz_content=
  {
"grant_type":"authorization_code或者refresh_token",
"code":"1cc19911172e4f8aaa509c8fb5d12F56",
"refresh_token":"201509BBdcba1e3347de4e75ba3fed2c9abebE36"
  }

//为确保安全通信，需自行验证响应示例中的sign值是否为蚂蚁金服所提供。

{
	"sign":"ERITJKEIJKJHKKKKKKKHJEREEEEEEEEEEE",
	"alipay_open_auth_token_app_response":{
		"msg":"Success",
		"app_auth_token":"201509BBeff9351ad1874306903e96b91d248A36",
		"code":"10000",
		"user_id":"2088102150527498",
		"re_expires_in":"123456",
		"app_refresh_token":"201509BBdcba1e3347de4e75ba3fed2c9abebE36",
		"auth_app_id":"2013121100055554",
		"expires_in":"123456"
	}
}

{
	"sign":"ERITJKEIJKJHKKKKKKKHJEREEEEEEEEEEE",
	"alipay_open_auth_token_app_response":{
		"msg":"Service Currently Unavailable",
		"code":"20000",
		"sub_msg":"系统繁忙",
		"sub_code":"isp.unknow-error"
	}
}