uni-app 支付宝APP支付

    /**
     * 主入口
     * @param array  $params 支付参数, 具体如下
     * @param string $params['subject'] 订单标题
     * @param string $params['out_trade_no'] 订单商户号
     * @param float  $params['total_amount'] 订单金额
     */
    public static function pay($params)
    {
        // 1.校检参数
        self::checkParams($params);

        // 2.构造参数
        $payRequestBuilder = new \AlipayTradeAppPayContentBuilder();
        $payRequestBuilder->setSubject($params['subject']);
        $payRequestBuilder->setOutTradeNo($params['out_trade_no']);
        $payRequestBuilder->setTotalAmount($params['total_amount']);
        $payRequestBuilder->setTimeExpress('30m');

        // 3.获取配置
        //$config = config('alipay');
        $config=alipay_confing();//传入支付宝参数
        $return_url = $params['redirect_url'];

        $notify_url = $config['notify_url'];
        $payResponse = new \AlipayAppPayTradeService($config);
       // dump(666);die;
        
        // 4.进行请求
        $result=$payResponse->appPay($payRequestBuilder,$return_url,$notify_url);
        
        //$result="111";
        //header("location:".$result);
        
        return $result;
    }

  /**
   * alipay.trade.app.pay
   * @param $builder 业务参数，使用buildmodel中的对象生成。
   * @param $return_url 同步跳转地址，公网可访问
   * @param $notify_url 异步通知地址，公网可以访问
   * @return $response 支付宝返回的信息
  */
  function appPay($builder,$return_url,$notify_url,$type='') {

    $biz_content=$builder->getBizContent();
    //打印业务参数
    $this->writeLog($biz_content);

    $request = new AlipayTradeAppPayRequest();

    $request->setNotifyUrl($notify_url);
    $request->setReturnUrl($return_url);
    $request->setBizContent ( $biz_content );

    // 首先调用支付api
    $response = $this->aopclientRequestExecute ($request,true);
    
    // $response = $response->alipay_trade_wap_pay_response;
    //$result=htmlspecialchars($response);
    return $response;
  }

  function aopclientRequestExecute($request,$ispage=false) {

    $aop = new AopClient ();
    $aop->gatewayUrl = $this->gateway_url;
    $aop->appId = $this->appid;
    $aop->rsaPrivateKey =  $this->private_key;
    $aop->alipayrsaPublicKey = $this->alipay_public_key;
    $aop->apiVersion ="1.0";
    $aop->postCharset = $this->charset;
    $aop->format= $this->format;
    $aop->signType=$this->signtype;
    // 开启页面信息输出
    $aop->debugInfo=true;

    $result = $aop->sdkExecute($request);
    
    //打开后，将报文写入log文件
    $this->writeLog("response: ".var_export($result,true));
    return $result;
  }

    /**
     * 生成用于调用收银台SDK的字符串
     * @param $request SDK接口的请求参数对象
     * @return string 
     * @author guofa.tgf
     */
    public function sdkExecute($request) {
        
        $this->setupCharsets($request);

        $params['app_id'] = $this->appId;
        $params['method'] = $request->getApiMethodName();
        $params['format'] = $this->format; 
        $params['sign_type'] = $this->signType;
        $params['timestamp'] = date("Y-m-d H:i:s");
        $params['alipay_sdk'] = $this->alipaySdkVersion;
        $params['charset'] = $this->postCharset;

        $version = $request->getApiVersion();
        $params['version'] = $this->checkEmpty($version) ? $this->apiVersion : $version;

        if ($notify_url = $request->getNotifyUrl()) {
            $params['notify_url'] = $notify_url;
        }

        $dict = $request->getApiParas();
        $params['biz_content'] = $dict['biz_content'];

        ksort($params);

        $params['sign'] = $this->generateSign($params, $this->signType);

        foreach ($params as &$value) {
            $value = $this->characet($value, $params['charset']);
        }
        
        return http_build_query($params);
    }