技术汇总：第十四章：电脑端生成支付宝二维码支付

支付宝支付
第一步：alipay.properties

alipay_url=https://openapi.alipay.com/gateway.do
        #app的id
        app_id=2018020102122556
        #私钥
        app_private_key=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
        #公钥
        alipay_public_key=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhkZi6W0wn/prX+NIIF9ATb5Z8ReKK4hFYtBrweDfGHD1mNW7YIZY4G5hE7S2Sry8eFXlFgSlBWlJ4fVnDaK9MkVThpwE2H65ooVlK/wLuyPqovIVpMt/utva5Ayuzv7eQOWK45FdLDNDlK8QLoBko6SS+YbnWnf7a+mrf4NAS4UFClpfe8Byqe8XIraO2Cg4Ko5Y5schX39rOAH8GlLdgqQRYVQ2dCnkIQ+L+I4Cy9Mvw3rIkTwt3MBU+AqREXY4r5Bn6cmmX/9MAJbFqrofGiUAqG+qbjTcZAzgNPfuiD0zXgt/YYjMQMzck75BOmwnYOam2ajODUSQn8Xybsa7wQIDAQAB
        #回调地址
        return_payment_url=http://localhost:8085/member/pay/alipay/callback/return
        #异步地址需要外网可以访问(暂时没有写)
        notify_payment_url=http://60.205.215.91/alipay/callback/notify

第二步：PayController

package com.macro.mall.portal.controller;
     
    import com.alibaba.fastjson.JSON;
    import com.alipay.api.AlipayApiException;
    import com.alipay.api.AlipayClient;
    import com.alipay.api.internal.util.AlipaySignature;
    import com.alipay.api.request.AlipayTradePagePayRequest;
    import com.macro.mall.common.api.CommonResult;
    import com.macro.mall.model.OmsOrderItem;
    import com.macro.mall.model.PaymentInfo;
    import com.macro.mall.portal.config.AlipayConfig;
    import com.macro.mall.portal.service.OmsPortalOrderService;
    import com.macro.mall.portal.service.PaymentService;
    import io.swagger.annotations.Api;
    import io.swagger.annotations.ApiOperation;
    import net.sf.json.JSONObject;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.ResponseBody;
    import javax.servlet.http.HttpServletRequest;
    import java.math.BigDecimal;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.Map;
     
    /**
     * 支付管理
     */
    @Controller
    @Api(tags = "PayController", description = "支付管理")
    @RequestMapping("/member/pay")
    public class PayController {
     
        @Autowired
        private PaymentService paymentService;
        @Autowired
        private OmsPortalOrderService omsPortalOrderService;
        @Autowired
        AlipayClient alipayClient;
     
        @ApiOperation("去支付")
        @RequestMapping(value = "/alipay/submit", method = RequestMethod.GET)
        @ResponseBody
        public String goToPay( String orderSn, BigDecimal totalAmount) {
            //根据订单编号获取订单详情信息
            OmsOrderItem omsOrderItem =omsPortalOrderService.getOrderByOrderSn(orderSn);
            //获取商品名称
            String productName = omsOrderItem.getProductName();
            //创建PC场景下单并支付请求对象
            AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();//创建API对应的request
            //设置同步返回地址，HTTP/HTTPS开头字符串
            alipayRequest.setReturnUrl(AlipayConfig.return_payment_url);
            //支付宝服务器主动通知商户服务器里指定的页面http/https路径。
            alipayRequest.setNotifyUrl(AlipayConfig.notify_payment_url);//在公共参数中设置回跳和通知地址
            Map<String,String> requestMap = new HashMap<>();
            requestMap.put("out_trade_no",orderSn);//订单编号
            requestMap.put("product_code","FAST_INSTANT_TRADE_PAY");//产品交易码
            requestMap.put("total_amount","0.01");//实际付款金额
            requestMap.put("subject",productName);//商品名称
            //填充业务参数
            alipayRequest.setBizContent(JSON.toJSONString(requestMap));
            String form="";
            try {
                //调用SDK生成表单
                form = alipayClient.pageExecute(alipayRequest).getBody();
            } catch (AlipayApiException e) {
                e.printStackTrace();
            }
            // 生成(保存)支付信息
            PaymentInfo paymentInfo = new PaymentInfo();
            paymentInfo.setOutTradeNo(orderSn);
            paymentInfo.setPaymentStatus("未支付");
            paymentInfo.setOrderId(String.valueOf(omsOrderItem.getOrderId()));
            paymentInfo.setTotalAmount(totalAmount);
            paymentInfo.setSubject(productName);
            paymentInfo.setCreateTime(new Date());
            paymentService.save(paymentInfo);
            // 发送检查支付结果的消息队列，
            paymentService.sendDelayPaymentCheck(orderSn,5);
            return form;
        }
     
        @ApiOperation("支付成功后同步回调转支付成功页面")
        @ResponseBody
        @RequestMapping(value = "/alipay/callback/return",method = RequestMethod.GET)
        public CommonResult callBackReturn(HttpServletRequest request){// 页面同步反转的回调
            Map<String,String> paramsMap = new HashMap<String, String>();
            Map parameterMap = request.getParameterMap();
            for(Iterator<String> iter = parameterMap.keySet().iterator(); iter.hasNext();){
                String name = iter.next();
                String[] values = (String [])parameterMap.get(name);
                String valueStr = "";
                for (int i = 0; i < values.length; i++) {
                    valueStr = (i == values.length - 1 ) ? valueStr + values [i] : valueStr + values[i] + ",";
                }
                paramsMap.put(name,valueStr);
            }
            String outTradeNo = request.getParameter("out_trade_no");
            String tradeNo = request.getParameter("trade_no");
            String sign = request.getParameter("sign");
            try {
                boolean b = AlipaySignature.rsaCheckV1(paramsMap, AlipayConfig.alipay_public_key,AlipayConfig.charset,AlipayConfig.sign_type);// 对支付宝回调签名的校验
            } catch (AlipayApiException e) {
                e.printStackTrace();
            }
            //修改支付信息，幂等性检查
    /*        boolean b = paymentService.checkPaymentStatus(outTradeNo);
            if(!b){
                PaymentInfo paymentInfo = paymentService.checkPaymentResult(outTradeNo);
                paymentService.updatePayment(request.getQueryString(),outTradeNo,tradeNo);
                //发送系统消息，出发并发商品支付业务消息队列
                paymentService.sendPaymentSuccess(outTradeNo,paymentInfo.getPaymentStatus(),tradeNo);
            }*/
            return CommonResult.success("支付成功");
        }
    }