// 支付寶
<dependency>
   <groupId>com.alipay.sdk</groupId>
   <artifactId>alipay-sdk-java</artifactId>
   <version>4.8.73.ALL</version>
</dependency>

/**
 * 統(tǒng)一下單接口
 * @param orderNo 訂單號(hào)
 * @param request
 * @return
 */
@PostMapping("/unifiedOrder")
@CrossOrigin(origins = "*",maxAge = 3600)//跨域
public ResultMap unifiedOrder(@RequestParam("orderNo") String orderNo,@RequestParam("payType") Integer payType,
                              HttpServletRequest request){
    try {
        // 1、驗(yàn)證訂單是否存在
        // 2、開(kāi)始微信支付統(tǒng)一下單
        Orders orders = ordersService.FindOrder(orderNo);
        ResultMap resultMap =null;
        if(orders!=null){
           if(payType==1){
               String spbill_create_ip = getIpAddr(request);
               resultMap = wxPayService.unifiedOrder(orders.getOrderNo(),orders.getTotalPrice(),"云App",spbill_create_ip);
               Hotel hotel= hotelMapper.selHotelById(orders.getHId());
               Note note=new Note();
               String s=note.Notefs(hotel.getPhone(),1);
               ordersService.updataorderpaytype(orders.getOrderNo(),payType);
           return resultMap;
           }else if(payType==2){
                // 2、創(chuàng)建支付寶訂單
                String orderStr = alipayService.createOrder(orders.getOrderNo(), orders.getTotalPrice(),"App");
               ordersService.updataorderpaytype(orders.getOrderNo(),payType);
                return ResultMap.ok().put("data",orderStr);
           }
        }
      return resultMap;//系統(tǒng)通用的返回結(jié)果集
    } catch (Exception e) {
        e.printStackTrace();
        System.out.println(e.getMessage());
        return ResultMap.error("服務(wù)器異常，付款失敗");
    }


}

//這是支付寶異步回調(diào)函數(shù)
/**
 * 支付異步通知
 * 接收到異步通知并驗(yàn)簽通過(guò)后，一定要檢查通知內(nèi)容，
 * 包括通知中的app_id、out_trade_no、total_amount是否與請(qǐng)求中的一致，并根據(jù)trade_status進(jìn)行后續(xù)業(yè)務(wù)處理。
 * https://docs.open.alipay.com/194/103296
 */
@PostMapping("/notify")
@CrossOrigin(origins = "*",maxAge = 3600)//跨域
public String notify(HttpServletRequest request, HttpSession session) {
  // 調(diào)用service層rsaCheckV1驗(yàn)證簽名
    boolean flag = alipayService.rsaCheckV1(request);
    if (flag) {
         String tradeStatus = request.getParameter("trade_status"); // 交易狀態(tài)
        String outTradeNo = request.getParameter("out_trade_no"); // 商戶訂單號(hào)
        String tradeNo = request.getParameter("trade_no"); // 支付寶訂單號(hào)
        /**
         * 還可以從request中獲取更多有用的參數(shù)，自己嘗試
         */
         //調(diào)用service層notify函數(shù)
        boolean notify = alipayService.notify(tradeStatus, outTradeNo, tradeNo);
        if(notify){
            return "success";
        }
    }
    return "fail";
}

private String publicKey="公鑰";
    @Override
    public String createOrder(String orderNo, double amount, String body) throws AlipayApiException {
        //SDK已經(jīng)封裝掉了公共參數(shù)，這里只需要傳入業(yè)務(wù)參數(shù)。以下方法為sdk的model入?yún)⒎绞?model和biz_content同時(shí)存在的情況下取biz_content)。
    //構(gòu)造client
        //構(gòu)造client
        CertAlipayRequest certAlipayRequest = new CertAlipayRequest();
    //設(shè)置網(wǎng)關(guān)地址https://openapi.alipay.com/gateway.do
        certAlipayRequest.setServerUrl("https://openapi.alipay.com/gateway.do");
//設(shè)置應(yīng)用Id
        certAlipayRequest.setAppId("appid");
//設(shè)置應(yīng)用私鑰
        certAlipayRequest.setPrivateKey("應(yīng)用私鑰");
        certAlipayRequest.setFormat("json");
//設(shè)置字符集
        certAlipayRequest.setCharset("UTF-8");
//設(shè)置簽名類型
        certAlipayRequest.setSignType("RSA2");
//設(shè)置應(yīng)用公鑰證書路徑
        certAlipayRequest.setCertPath("證書驗(yàn)證的應(yīng)用公鑰證書路徑");
//設(shè)置支付寶公鑰證書路徑
        certAlipayRequest.setAlipayPublicCertPath("證書驗(yàn)證的支付寶公鑰證書路徑");
//設(shè)置支付寶根證書路徑
        certAlipayRequest.setRootCertPath("證書驗(yàn)證的支付寶根證書路徑");
//構(gòu)造client
        AlipayClient alipayClient = new DefaultAlipayClient(certAlipayRequest);
//實(shí)例化具體API對(duì)應(yīng)的request類,類名稱和接口名稱對(duì)應(yīng),當(dāng)前調(diào)用接口名稱：alipay.trade.app.pay
        AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();
//SDK已經(jīng)封裝掉了公共參數(shù)，這里只需要傳入業(yè)務(wù)參數(shù)。以下方法為sdk的model入?yún)⒎绞?model和biz_content同時(shí)存在的情況下取biz_content)。
        AlipayTradeAppPayModel model = new AlipayTradeAppPayModel();
        model.setSubject(body);
        model.setOutTradeNo(orderNo);
        model.setTotalAmount(String.valueOf(amount));
        model.setTimeoutExpress("30m");
        /*model.setTotalAmount("0.01");*/
        model.setProductCode("QUICK_MSECURITY_PAY");
       /* model.setPassbackParams("公用回傳參數(shù)，如果請(qǐng)求時(shí)傳遞了該參數(shù)，則返回給商戶時(shí)會(huì)回傳該參數(shù)");*/
        //實(shí)例化具體API對(duì)應(yīng)的request類,類名稱和接口名稱對(duì)應(yīng),當(dāng)前調(diào)用接口名稱：alipay.trade.app.pay
        AlipayTradeAppPayRequest ali_request = new AlipayTradeAppPayRequest();
        ali_request.setBizModel(model);
        ali_request.setNotifyUrl("回調(diào)地址");// 回調(diào)地址
        AlipayTradeAppPayResponse ali_response = alipayClient.sdkExecute(ali_request);
        //就是orderString 可以直接給客戶端請(qǐng)求，無(wú)需再做處理。
        return ali_response.getBody();
    }
//支付寶簽名驗(yàn)證
    @Override
    public boolean rsaCheckV1(HttpServletRequest request){
        try {
            //獲取支付寶POST過(guò)來(lái)反饋信息
            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] + ",";
                }
                //亂碼解決，這段代碼在出現(xiàn)亂碼時(shí)使用。
                //valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
                params.put(name, valueStr);
            }
//切記alipaypublickey是支付寶的公鑰，請(qǐng)去open.alipay.com對(duì)應(yīng)應(yīng)用下查看。
//boolean AlipaySignature.rsaCertCheckV1(Map<String, String> params, String publicKeyCertPath, String charset,String signType)
            boolean flag = AlipaySignature.rsaCertCheckV1(params, publicKey, alipayConfig.getCharset(),"RSA2");
         /* 千萬(wàn)不要調(diào)用錯(cuò)了?。?！上面的才是證書驗(yàn)證調(diào)用的函數(shù)這個(gè)是普通驗(yàn)證調(diào)用函數(shù)  boolean verifyResult = AlipaySignature.rsaCheckV1(params, publicKey, alipayConfig.getCharset(), alipayConfig.getSignType());*/
            System.out.println("flag-----------"+flag);
            return flag;
        }catch (AlipayApiException e) {
            logger.debug("verify sigin error, exception is:{}",e);
            return false;
        }
    }
//notify()支付成功或者失敗后一系列操作
@Override
public boolean notify(String tradeStatus, String orderNo, String tradeNo) {
    if ("TRADE_FINISHED".equals(tradeStatus)
            || "TRADE_SUCCESS".equals(tradeStatus)) {
        Orders orders =ordersMapper.FindOrder(orderNo);
        // 支付成功，根據(jù)業(yè)務(wù)邏輯修改相應(yīng)數(shù)據(jù)的狀態(tài)
        int state =ordersMapper.updateOrder(DateUtil.now(),orderNo);
       Hotel hotel= hotelMapper.selHotelById(orders.getHId());
        Note note=new Note();
        String s=note.Notefs(hotel.getPhone(),1);
        // boolean state = orderPaymentService.updatePaymentState(orderNo, tradeNo);
        if (state!=0) {
            return true;
        }else {
         UMember m= memberMapper.selMemByOrderNo(orderNo);
         Boolean b= userMapper.updateVip(m.getOpenId(),2);
        }
    }
    //支付失敗查詢訂單詳情得到用戶id
    Orders orders=ordersMapper.FindOrder(orderNo);
    //將扣除的積分返還
    if(orderNo!=null){
        //添加用戶積分
        ordersMapper.RefundIntegral(orders.getOpenId(),orders.getIntegral());
        /*//添加退回積分記錄
        ordersMapper.insIntegralRecord(orders.getOpenId(),orders.getIntegral(),1,2);*/
    }
    return false;
}