JAVA PC-side scan code payment (2) Alipay payment development

One, placement

configure

1. User registration

   First, register an Alipay account on the Ant Financial Open Platform with company-related information ( https://openhome.alipay.com/platform/home.htm )

   Then after entering the open platform, go to Developer Center > Web & Mobile Application Access

   

   Then sign a contract with Alipay and access the payment function (mobile website payment)

   

2. Configure and obtain relevant development information

   Enter the payment function page of the application and configure the authorization callback address and key

   

ok, now we have obtained APPID, Alipay gateway, authorization callback address, merchant private key, application public key, Alipay public key and other related information, I will write them into the configuration file during development

In addition, we also need an Alipay SDK, please download it yourself

At this point, all the required preparations are completed, and everyone can develop happily.

2. Development

payment logic

• payment logic

  1. The merchant system calls the Alipay pre-order interface alipay.trade.precreate to obtain the QR code image address of the order.
  2. Initiate polling to get the payment result: After waiting for 5 seconds, call the transaction query interface alipay.trade.query to query the payment result (return parameter TRADE_STATUS) through the merchant's order number (out_trade_no) passed in during payment, if it still returns waiting for user payment (WAIT_BUYER_PAY) , then wait for 5 seconds and continue to query until the exact payment result is returned (successful TRADE_SUCCESS or revoked and closed TRADE_CLOSED), or the polling time is exceeded. In the case that the last query still returns waiting for the user to pay, the transaction cancellation interface alipay.trade.cancel must be called immediately to cancel the transaction to prevent the user from continuing to pay.
  3. Here is the list text. In addition to active polling, payment results can also be obtained by accepting asynchronous notifications.
  4. The difference from WeChat payment lies in the way Alipay returns to query the user's payment status. In addition to actively polling and querying the payment status, Alipay can also obtain it asynchronously. We use these two methods interchangeably in the project.

public request parameters

• public request parameters

  

Business logic not related to payment

• Business logic not related to payment

  This part of the code has been posted in the previous article WeChat payment, so I won't post it again here

Package fixed parameters

• Package fixed parameters

package com.andata.conf;
/* * 
 *类名：AlipayConfig
 *功能：基础配置类
 *详细：设置帐户有关信息及返回路径
 *提示：如何获取安全校验码和合作身份者ID
 *1.用您的签约支付宝账号登录支付宝网站(www.alipay.com)
 *2.点击“商家服务”(https://b.alipay.com/order/myOrder.htm)
 *3.点击“查询合作者身份(PID)”、“查询安全校验码(Key)”
 *安全校验码查看时，输入支付密码后，页面呈灰色的现象，怎么办？
 *解决方法：
 *1、检查浏览器配置，不让浏览器做弹框屏蔽设置
 *2、更换浏览器或电脑，重新登录查询。
 */
public class AlipayConfig {
	//ServiceURL
	public static String ServiceUrl="https://openapi.alipay.com/gateway.do";
	//APP支付宝支付业务：app_id
	public static String app_id = "20180xxxxxxxxxxxxxx";
	// 商户的私钥,使用支付宝自带的openssl工具生成。
	public static String private_key = "xxxxxxxxxxxxxxxxxxx";
	// 应用的公钥，无需修改该值
	public static String ali_public_key  = "xxxxxxxxxxxxxxxxxxxxx";
	// 支付宝的公钥，去open.alipay.com对应应用下查看。
	public static String zfb_public_key  = "xxxxxxxxxxxxxxxxxxxxx";
	// 字符编码格式 目前支持 gbk 或 utf-8
	public static String input_charset = "UTF-8";
}

AliPayController

package com.andata.controller;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.AlipayTradeCancelRequest;
import com.alipay.api.request.AlipayTradePrecreateRequest;
import com.alipay.api.request.AlipayTradeQueryRequest;
import com.alipay.api.response.AlipayTradeCancelResponse;
import com.alipay.api.response.AlipayTradePrecreateResponse;
import com.alipay.api.response.AlipayTradeQueryResponse;
import com.andata.conf.AlipayConfig;
import com.andata.pojo.ProductOrders;
import com.andata.service.ProOrdersService;
import com.andata.util.QRCodeUtil;
import net.sf.json.JSONObject;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

@Controller
public class AliPayController {
    @Resource
    private ProOrdersService proOrdersService;
    /**
     * 支付逻辑
     * 1、商户系统调用支付宝预下单接口alipay.trade.precreate，获得该订单二维码图片地址。
     * 2、发起轮询获得支付结果：等待5秒后调用交易查询接口alipay.trade.query通过支付时传入的商户订单号(out_trade_no)查询支付结果（返回参数TRADE_STATUS），
     如果仍然返回等待用户付款（WAIT_BUYER_PAY），则再次等待5秒后继续查询，直到返回确切的支付结果（成功TRADE_SUCCESS 或 已撤销关闭TRADE_CLOSED），
     或是超出轮询时间。在最后一次查询仍然返回等待用户付款的情况下，必须立即调用交易撤销接口alipay.trade.cancel将这笔交易撤销，避免用户继续支付。
     * 3、除了主动轮询，也可以通过接受异步通知获得支付结果
     */
    /**
     * 阿里订单取消接口
     * 请求返回值示例:
     * {"alipay_trade_cancel_response":{"code":"40004","msg":"Business Failed","sub_code":"ACQ.INVALID_PARAMETER","sub_msg":"参数无效","out_trade_no":"20150320010101002",
     * "retry_flag":"N"},"sign":""}[DEBUG] 2018-02-09 10:54:24,101 method:org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdviceChain.invoke(ResponseBodyAdviceChain.java:61)
     * @return
     * @throws AlipayApiException
     */
    @RequestMapping(value = "aliremove.do")
    @ResponseBody
    private Map<String, Object> remove(@Param("orderid")String orderid) throws AlipayApiException {
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.ServiceUrl, AlipayConfig.app_id, AlipayConfig.private_key, "json", AlipayConfig.input_charset, AlipayConfig.zfb_public_key, "RSA2"); //获得初始化的AlipayClient
        AlipayTradeCancelRequest request = new AlipayTradeCancelRequest();//创建API对应的request类
        Map<String,Object> returnmap=new HashMap<>();
        try {
            //判断订单是否完成支付,完成支付的订单禁止撤销
            int i = this.proOrdersService.selectOrderStatus(orderid);
            if (i==1)
            {
                returnmap.put("type","0");
                returnmap.put("data","订单已支付，撤销订单失败");
            }else {
                Map<String,Object> map=new HashMap<>();
                map.put("out_trade_no",orderid);
                String returndata = JSONObject.fromObject(map).toString();
                request.setBizContent(returndata); //设置业务参数
                AlipayTradeCancelResponse response = alipayClient.execute(request);//通过alipayClient调用API，获得对应的response类
                JSONObject query_response = JSONObject.fromObject(response.getBody()).getJSONObject("alipay_trade_cancel_response");
                String code = query_response.getString("code");
                String msg = query_response.getString("msg");
                if (code.equals("10000") && msg.equals("Success")) {
                    System.out.println("阿里订单取消接口调用成功！");
                    returnmap.put("type","1");
                    returnmap.put("data","撤销订单成功");
                }else {
                    System.out.println("撤销订单请求失败");
                    returnmap.put("type","0");
                    returnmap.put("data",query_response.getString("sub_msg"));
                    System.out.println(query_response);//返回失败信息
                }
                //根据response中的结果继续业务逻辑处理
            }
        }catch (Exception e)
        {
            System.out.println("撤销订单异常");
            e.printStackTrace();
        }
        return returnmap;
    }

    /**
     * 阿里交易查询接口
     * out_trade_no	支付时传入的商户订单号，与trade_no必填一个
     *  trade_no	支付时返回的支付宝交易号，与out_trade_no必填一个
     *  请求返回值示例：
     *  {"alipay_trade_query_response":{"code":"10000","msg":"Success","buyer_logon_id":"159****4027","buyer_pay_amount":"0.01","buyer_user_id":"2088012351746164",
     *  "fund_bill_list":[{"amount":"0.01","fund_channel":"PCREDIT"}],"invoice_amount":"0.01","out_trade_no":"020910312752381","point_amount":"0.00","receipt_amount":"0.01",
     *  "send_pay_date":"2018-02-09 10:31:45","total_amount":"0.01","trade_no":"2018020921001004160275738069","trade_status":"TRADE_SUCCESS"},
     *  "sign":""}
     * @return
     * @throws Exception
     */
    @RequestMapping(value="/aliget")
    @ResponseBody
    private Map<String, Object> get(@Param("orderid")String orderid) throws AlipayApiException{
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.ServiceUrl, AlipayConfig.app_id, AlipayConfig.private_key, "json", AlipayConfig.input_charset, AlipayConfig.zfb_public_key, "RSA2"); //获得初始化的AlipayClient
        AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();//创建API对应的request类
        Map<String,Object> map=new HashMap<>();
        map.put("out_trade_no",orderid);
        String returndata = JSONObject.fromObject(map).toString();
        request.setBizContent(returndata); //设置业务参数
        AlipayTradeQueryResponse response = alipayClient.execute(request);//通过alipayClient调用API，获得对应的response类
        JSONObject jsonObject = JSONObject.fromObject(response.getBody()).getJSONObject("alipay_trade_query_response");
        String code = jsonObject.getString("code");
        String msg = jsonObject.getString("msg");
        Map<String,Object> returnmap=new HashMap<>();
        if (code.equals("10000") && msg.equals("Success"))
        {
            System.out.println("交易查询请求成功");
            String trade_status = jsonObject.getString("trade_status");
            if (trade_status.equals("TRADE_SUCCESS"))
            {
                returnmap.put("type","1");
                returnmap.put("data","支付成功");
            }else {
                returnmap.put("type","0");
                returnmap.put("data",trade_status);
            }
        }else {
            System.out.println("交易查询请求失败");
            returnmap.put("type","0");
            returnmap.put("data",jsonObject.getString("sub_msg"));
            System.out.println(jsonObject);//返回失败信息
        }
        return returnmap;
    }
    /**
     * @name 预下单请求，阿里获取二维码接口
     * @throws AlipayApiException
     * @Param out_trade_no 商户订单号,64个字符以内、只能包含字母、数字、下划线；需保证在商户端不重复
     * @Param total_amount 订单总金额，单位为元，精确到小数点后两位，取值范围[0.01,100000000] 如果同时传入了【打折金额】，【不可打折金额】，
     * 【订单总金额】三者，则必须满足如下条件：【订单总金额】=【打折金额】+【不可打折金额】
     * @Param subject 订单标题
     * @Param store_id 商户门店编号
     * @Param timeout_express 该笔订单允许的最晚付款时间，逾期将关闭交易。
     * 取值范围：1m～15d。m-分钟，h-小时，d-天，1c-当天（1c-当天的情况下，无论交易何时创建，都在0点关闭）。 该参数数值不接受小数点， 如 1.5h，可转换为 90m。
     */
    @RequestMapping(value="/alipay.do")
    @ResponseBody
    private Map list(HttpServletResponse responses, @Param("orderid")String orderid) throws AlipayApiException{
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.ServiceUrl, AlipayConfig.app_id, AlipayConfig.private_key, "json", AlipayConfig.input_charset, AlipayConfig.zfb_public_key, "RSA2"); //获得初始化的AlipayClient
        AlipayTradePrecreateRequest request = new AlipayTradePrecreateRequest();//创建API对应的request类

        Map<String,Object> map=new HashMap<>();
        if (orderid.isEmpty())
        {
            map.put("type","2");
            map.put("data","订单号不能为空");
            return map;
        }
        //设置回调地址
        request.setNotifyUrl("http://www.andata.com.cn/aliPayCallBack.do");
        //根据订单号查询订单信息
        ProductOrders productOrders = this.proOrdersService.selectByOrderId(orderid);
        Map<String,Object> maps=new HashMap<>();
        maps.put("out_trade_no",productOrders.getOrdernumber());
        maps.put("total_amount","0.01");
        maps.put("subject","小编机器人纠错");
        maps.put("store_id","XB001");
        maps.put("timeout_express","1m");
        //把订单信息转换为json对象的字符串
        String postdata = JSONObject.fromObject(maps).toString();
        request.setBizContent(postdata);
        AlipayTradePrecreateResponse response = alipayClient.execute(request);
        String body = response.getBody();
        JSONObject jsonObject = JSONObject.fromObject(body);
        String qr_code = jsonObject.getJSONObject("alipay_trade_precreate_response").getString("qr_code");
        //流输出
        ServletOutputStream sos = null;
        try {
            sos = responses.getOutputStream();
            //生成二维码
            QRCodeUtil.encode(qr_code, sos);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return map;
    }

    /**
     * 支付宝支付成功回调
     */
    @RequestMapping(value = "aliPayCallBack.do")
    @ResponseBody
    public void aliPayCallBack(HttpServletResponse response, HttpServletRequest request) {
        System.out.println("支付宝回调成功");
        try {
            //获取支付宝POST过来反馈信息
            Map<String,String> params = new HashMap<String,String>();
            Map requestParams = request.getParameterMap();
            for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {
                String name = (String) iter.next();
                String[] values = (String[]) requestParams.get(name);
                String valueStr = "";
                for (int i = 0; i < values.length; i++) {
                    valueStr = (i == values.length - 1) ? valueStr + values[i]
                            : valueStr + values[i] + ",";
                }
                //乱码解决，这段代码在出现乱码时使用。
                //valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
                params.put(name, valueStr);
            }
            boolean flag = AlipaySignature.rsaCheckV1(params, AlipayConfig.zfb_public_key, AlipayConfig.input_charset,"RSA2");
            // 获取支付宝的通知返回参数，可参考技术文档中页面跳转同步通知参数列表(以下仅供参考)//
            String order_no = request.getParameter("out_trade_no"); // 获取订单号

//			String trade_no = request.getParameter("trade_no"); // 支付宝交易号
//			String total_amount = request.getParameter("total_amount"); // 获取总金额
//			String subject = new String(request.getParameter("subject")
//					.getBytes("ISO-8859-1"), "gbk");// 商品名称、订单名称
//			String body = "";
//			if (request.getParameter("body") != null) {
//				body = new String(request.getParameter("body").getBytes(
//						"ISO-8859-1"), "gbk");// 商品描述、订单备注、描述
//			}
//			String buyer_email = request.getParameter("buyer_email"); // 买家支付宝账号
            String trade_status = request.getParameter("trade_status"); // 交易状态
            // 获取支付宝的通知返回参数，可参考技术文档中页面跳转同步通知参数列表(以上仅供参考)//
            if (flag==true) {// 验证成功
                try{
                    int i = this.proOrdersService.updateByOrderId(order_no);
                    if (i==1)
                    {
                        System.out.println("支付宝订单支付成功！");
                    }
                }catch (Exception e)
                {
                    System.out.println("支付宝支付异常");
                    e.printStackTrace();
                }
            }
            response.getWriter().write("success");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Now, the basic codes have been pasted, and the logic of generating the QR code is the same as WeChat. After getting the code_url, use the QR code generator class to generate the QR code, paste it on the page where the payment needs to be made, and it is successful. ~