说明：

交易创建接口主要是用于创建交易生成trade_no，配合jsapi唤起收银台来唤起支付的。

一、官方文档

官方文档地址：[url]https://docs.open.alipay.com/api_1/alipay.trade.create/[/url]

二、开发前准备工作

1、签约：[url]https://openclub.alipay.com/read.php?tid=276&fid=72[/url]

2、创建应用：[url]https://openclub.alipay.com/read.php?tid=1606&fid=72[/url]

3、生成密钥：[url]https://openclub.alipay.com/read.php?tid=1833&fid=69[/url]

4、下载服务端sdk：[url]https://docs.open.alipay.com/54/106370/[/url]

如何签约以及签约无法成功等相关签约问题：[url]https://openclub.alipay.com/read.php?tid=276&fid=72[/url]

注意事项：1、支持沙箱测试；2、需签约并添加功能；3、支持第三方调用。

检查调用appid的应用功能列表中是否添加“当面付”并显示已签约。

三、接口集成示例代码

1、参数说明

（1）out_trade_no：商户订单号，由商户自定义设置；

（2）subject：商品标题；

（3）buyer_id：买家的支付宝唯一用户号（2088开头的16位纯数字）；

（4）total_amount：交易订单金额，精确到小数点后2位，最小设置为0.01；

2、JAVA版请求示例

沙箱账号

//沙箱APPID	public static final  String app_id = "您的appid";	//沙箱私钥pkcs8格式	public static final  String merchant_private_key = "您的应用私钥";	//支付宝公钥	public static final  String alipay_public_key = "您的支付宝公钥";	//沙箱网关地址	public static final  String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";

请求示例

AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do","app_id","your private_key","json","GBK","alipay_public_key","RSA2");AlipayTradeCreateRequest request = new AlipayTradeCreateRequest();//model格式传值AlipayTradeCreateModel   model =new AlipayTradeCreateModel();	model.setOutTradeNo("20150320010101002");	model.setTotalAmount("0.01");	model.setBuyerId("20888028623****");//传入付款方的pid	model.setSubject("Iphone6 16G");	model.setBody("Iphone6 16G");request.setBizModel(model);/**	json格式传值request.setBizContent("{" +		"\"out_trade_no\":\"20150320010101001\"," +		"\"total_amount\":0.01," +		"\"subject\":\"Iphone6 16G\"," +		"\"body\":\"Iphone6 16G\"," +		"\"buyer_id\":\"20888028623****\"" +//传入付款方的pid		"  }");**/AlipayTradeCreateResponse response = alipayClient.execute(request);//使用第三方应用授权app_auth_token传值方式//AlipayTradeCreateResponse response = alipayClient.execute(request,null,"app_auth_token");if(response.isSuccess()){	System.out.println("调用成功");	System.out.println(response.getBody());} else {	System.out.println("调用失败");	System.out.println(response.getBody());}

返回结果

{"alipay_trade_create_response":{"code":"10000","msg":"Success","out_trade_no":"20150320010101001","trade_no":"2018121722001473950576863846"},"sign":"OqTZURLG3Oa6w1oD2Rg8NLvRzLQsa5GSxBmwvQlrBed+xCh4IfRgWhYQJuk8ru/uoE00DgkFO+zWWYwuW6a50s4+LnSbOo0N9aEE1Ft7ncjXGNalFdhDLumuTvOzgvpS59QsdSx5FsCplMCfG7+rm5ZTN189dICQKzuFridKeMXdrzKEnuJBEdld29+6ptW0Q00Ua1kHWkCHLKKIEMfbob6kKrV3iYsTtCCuAb8lgrpuI+7WyAQQpyakbkoPyxIqUNdaeiijfEHNjMwCh0Nx3qoziyrebK2fiQjWNWXRqW/AoIgPBMdsTr7jCpIMAulANw8z587woA4ELJIfcM879Q=="}

3、PHP版请求示例

  gatewayUrl = 'https://openapi.alipaydev.com/gateway.do';$aop->appId = '您的appid';$aop->rsaPrivateKey = '您的应用私钥';$aop->apiVersion = '1.0';$aop->postCharset='utf-8';$aop->format='json';$aop->signType = 'RSA2';//生成随机订单号$date=date("YmdHis");$arr=range(1000,9999);shuffle($arr);$request = new AlipayTradeCreateRequest ();$request->setBizContent("{" .    "\"out_trade_no\":\"".$date.$arr[0]."\"," .    "\"total_amount\":\"0.01\"," .	"\"subject\":\"tets\"," .	"\"buyer_id\":\"2088102175822813\"," .    "\"timeout_express\":\"2m\"" .    "}");$result = $aop->execute($request);//第三方请求，传入的是谁的授权token，资金就收款到谁的账户，不传token则收款到app_id对应的账户//$result = $aop->execute($request,"","auth_token");var_dump($result);?>

返回结果

object(stdClass)[9]  public 'alipay_trade_create_response' =>     object(stdClass)[10]      public 'code' => string '10000' (length=5)      public 'msg' => string 'Success' (length=7)      public 'out_trade_no' => string '201901030700291291' (length=18)      public 'trade_no' => string '2019010322001422810200828570' (length=28)  public 'sign' => string 'Tkud9S3K+866Ldp/aB/11fj9mcd3s9KPjvwooX4Sy1JFJS+9IA7c+X7JldNXRBfhePiJNgT5fiGg/ZYk7g1qzr1zVaCCk+DyoTcNJiy8eLD+FhoqspR4ClXyEjscupLhSEOVvvTeDlBqAb409JWyux9ZMFJoI7InxFS2o7kQiI9MdcaDBM7BYNqUVU2GlZ0EOCqq581yN4I+nynXfIxNIUDCIveSYipqWxUaqKUENCfHOAx4mH+VLEA4337n3oXIu9D1MvGqge1Rr+maUyzcZKQMQeaQ06nYxCW3TmxlTzUYrWoEOLllVS3PXTwfqQj09rCD0lHe5AIrt67BcOGtEQ==' (length=344)

4、.NET版请求示例

 IAopClient client = new DefaultAopClient("https://openapi.alipaydev.com/gateway.do", Com.Alipay.Config.appId, Com.Alipay.Config.merchant_private_key, "json", "1.0", "RSA2", Com.Alipay.Config.alipay_public_key, "GBK", false);            AlipayTradeCreateRequest alipayRequest = new AlipayTradeCreateRequest();//创建API对应的request            AlipayTradeCreateModel model = new AlipayTradeCreateModel();            model.OutTradeNo = "2018092815181234561223434123";            model.Subject = "交易创建接口测试";            model.TotalAmount = "0.01";            //用户pid（付款方pid）可使用用户信息授权方式获取            model.BuyerId = "2088102175822813";            alipayRequest.SetBizModel(model);            //第三方调用方式            //AlipayTradeCreateResponse response = client.Execute(alipayRequest, "", "app_auth_token");            //自调用方式            AlipayTradeCreateResponse response = client.Execute(alipayRequest);            Console.WriteLine("交易创建接口返回信息：" + response.Body);

返回结果

交易创建接口返回信息：{"alipay_trade_create_response":{"code":"10000","msg":"Success","out_trade_no":"2018092815181234561223434123","trade_no":"2019010322001422810200828571"},"sign":"eqiXYmUwA7thyXUpF46RQSZy95oaBui78K4DPajWw4BrXUTDzeKWyXBBmQk0PMHLQDNXbk1oO71TsiZzMqFwQ1WJqZwdEuy3nz81bjiFauK6NwdZs4odE/w+LiY8MTBCt7sjWSHI4nj4wtagsmLzixe16TUQP0CDhw29X2/6CQMjz8+YhaV8BAciAt1D2bl7Zk12dYCYilOZugpcWJxZ58pZ3OZ+vYAk1l9DtUqeum+EldimP4ebQIMYnBs0bcqjHrePXd4sxzJW0alSunYrydn2ZgbhWLsuqWhsoGtaac1svDS4uhehgKtAMP2Y0Z78ZSBV2npM4c74RQw4OPtmGQ=="}

四、注意事项

1、获取买家的buyer_id

建议使用用户信息授权接口获取pid，详细的获取方案：[url]https://openclub.alipay.com/read.php?tid=1813&fid=68[/url]

2、基础常识

1).交易创建接口支持第三方代商户发起请求，详细的如何传入app_auth_token的代码在示例里面已经说明

2).接口调用成功返回10000后，这边调用查询接口是可以查询到订单信息的，但是是等待支付状态的订单

3、trade_no请求方式

商家获取到返回的trade_no参数，需要使用jsapi唤起支付，具体详细的建议参考文档

创建订单+JSAPI唤起收银台支付：[url]https://docs.open.alipay.com/common/105591[/url]

4、辅助接口

alipay.trade.query(统一收单线下交易查询)集成流程：[url]https://openclub.alipay.com/read.php?tid=13842&fid=56[/url]

alipay.trade.refund(统一收单交易退款接口) 集成流程：[url]https://openclub.alipay.com/read.php?tid=13853&fid=56[/url]

alipay.trade.fastpay.refund.query(统一收单交易退款查询) ：[url]https://openclub.alipay.com/read.php?tid=13962&fid=56[/url]

alipay.trade.close(统收单交易关闭接口)集成流程：[url]https://openclub.alipay.com/read.php?tid=13963&fid=56[/url]

alipay.data.dataservice.bill.downloadurl.query(查询对账单下载地址)：[url]https://openclub.alipay.com/read.php?tid=14016&fid=56[/url]

五、Java版本demo

json传值demo：download:交易创建接口json传值Javademo.zip

model传值demo：download:交易创建接口model传值Java demo.zip