public function pay() {
 Vendor('alipay.wappay.service.AlipayTradeService');
        Vendor('alipay.wappay.buildermodel.AlipayTradeWapPayContentBuilder');
        Vendor('alipay.aop.request.AlipayTradeWapPayRequest');
        $aop = new \AopClient ();
        $aop->gatewayUrl = 'https://openapi.alipay.com/gateway.do';    
        $aop->appId = config('alipayconf.app_id');    //第三方应用appid
        $aop->rsaPrivateKey = config('alipayconf.merchant_private_key');   //商户私钥
        $aop->alipayrsaPublicKey = config('alipayconf.alipay_public_key');   //支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。
        $aop->apiVersion = '1.0';
        $aop->postCharset = 'utf-8';
        $aop->format = 'json';
        $aop->signType = 'RSA2';
//BizContent参数
        $body = '测试';
        $subject = '测试收费';
        $out_trade_no = "CBKJ" . date("YmdHis") . rand(111, 999);
        $seller_id = '2099331887318983';    //签约商家
        $timeout_express = '90m';
        $total_amount = '0.01';
        $product_code = 'QUICK_WAP_WAY';
        $request = new \AlipayTradeWapPayRequest ();

        $request->setBizContent("{" .
                "    \"body\":\"" . $body . "\"," .
                "    \"subject\":\"" . $subject . "\"," .
                "    \"out_trade_no\":\"" . $out_trade_no . "\"," .
                "    \"seller_id\":\"" . $seller_id . "\"," .
                "    \"timeout_express\":\"" . $timeout_express . "\"," .
                "    \"total_amount\":\"" . $total_amount . "\"," .
                "    \"product_code\":\"" . $product_code . "\"" .
                "  }");
        $request->setReturnUrl(config('alipayconf.return_url'));    //回调地址
        $request->setNotifyUrl(config('alipayconf.notify_url'));   //异步回调地址
        $app_auth_token = '202851955006D98';    //签约商家后支付宝生成的
        $result = $aop->pageExecute($request, null, $app_auth_token);      //注意sdk  pageExecute 方法缺失$app_auth_token参数 （我下载sdk的是缺失）
        
        print_r($result);
        exit;
        }

// $app_auth_token 获取

//pageExecute 方法缺失$app_auth_token参数

$sysParams[“app_auth_token”] = $appInfoAuthtoken;