支付宝H5支付

我这里指的是微信工作号中打开支付宝支付

文档

上面文档一定要仔细阅读

[快速接入](https://docs.open.alipay.com/203/105285/）

@RequestMapping("/alipay")
public void alipay(@RequestParam("orderNumber") String orderNumber, HttpServletRequest request, HttpServletResponse response) throws Exception{
    OrderInfo info = orderInfoService.selectOne(new EntityWrapper<OrderInfo>()
                                                .eq("order_number",orderNumber));

    orderInfoService.updateById(info);
    String orderNo = (System.currentTimeMillis()+"").substring(1)+(System.nanoTime()+"").substring(7,8);
    String totalAmount = info.getOrderMoney().toString();
    String subject = info.getOrderProject();
    //封装请求客户端
    AlipayClient client = new
        DefaultAlipayClient (url,app_id,private_key,format,charset,
                             public_key,signtype );
    //支付请求
    AlipayTradeWapPayRequest alipayRequest = new AlipayTradeWapPayRequest();
    alipayRequest.setReturnUrl("http://XXXX.com/xxxx/api/returnUrl?orderNumber="+orderNumber);
    alipayRequest.setNotifyUrl("http://xxxx.com/xxxx/api/notifyUrl");
    AlipayTradeWapPayModel model = new AlipayTradeWapPayModel();
    model.setProductCode("QUICK_WAP_PAY");
    model.setOutTradeNo(orderNo);
    model.setSubject(subject);
    model.setTotalAmount(totalAmount);
    model.setBody(info.getOrderProject());
    alipayRequest.setBizModel(model);
    String form = client.pageExecute(alipayRequest).getBody();
    response.setContentType("text/html;charset="+charset);
    response.getWriter().write(form);
    response.getWriter().flush();
    response.getWriter().close();
}

这里有点像老式的servlet渲染界面

这里的参数，请根据官方的指引

AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do", APP_ID, APP_PRIVATE_KEY, "json", CHARSET, ALIPAY_PUBLIC_KEY, "RSA2"); //获得初始化的AlipayClient

私钥，公钥，阿里公钥，根据官方提供的工具，生成，上面代码中需要的是私钥，还有阿里公钥

AlipayTradeWapPayRequest alipayRequest = new AlipayTradeWapPayRequest();

AlipayTradeWapPayRequest这个类是渲染手机界面，而AlipayTradePagePayRequest渲染PC端

model.setProductCode("QUICK_WAP_PAY");

注意此处的productCode，不要写错了

支付宝同步跳转

 /**
     * 支付宝同步跳转
     * */
    @RequestMapping("/returnUrl")
    public void returnUrl(HttpServletRequest request, HttpServletResponse response) throws Exception{
        String orderNumber = request.getParameter("orderNumber");
        // 获取支付宝GET过来反馈信息（官方固定代码）
        OrderInfo info = orderInfoService.selectOne(new EntityWrapper<OrderInfo>()
                .eq("order_number",orderNumber));
        Map<String, String> params = new HashMap<String, String>();
        Map<String, String[]> requestParams = request.getParameterMap();
        for (Iterator<String> 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] + ",";
            }
            params.put(name, valueStr);
        }
        params.remove("orderNumber");
		//注意，我这里remove map中的orderNumber，是因为如果加入orderNumber，下面这个对signVerified的判断会有有印象
        boolean signVerified = AlipaySignature.rsaCheckV1(params, public_key, charset, signtype);
        // 返回界面
        //if (signVerified) {
          //  info.setOrderState(1);
            //orderInfoService.updateById(info);
        //}

        response.sendRedirect("http://m.xxxx.com/orderDetail.html?orderNum="+orderNumber);
    }

支付宝服务器异步通知

 /**
     * 支付宝服务器异步通知
     *
     * @param request
     * @throws Exception
     */
    @RequestMapping("/notifyUrl")
    public void notifyUrl(HttpServletRequest request, PrintWriter out) throws Exception {
        // 获取支付宝GET过来反馈信息
        Map<String, String> params = new HashMap<String, String>();
        Map<String, String[]> requestParams = request.getParameterMap();
        for (Iterator<String> 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] + ",";
            }
            params.put(name, valueStr);
        }

        boolean signVerified = AlipaySignature.rsaCheckV1(params, public_key, charset, signtype); // 调用SDK验证签名

        if (signVerified) { // 验证成功 更新订单信息
            System.out.println("异步通知成功");
            // 商户订单号
            String out_trade_no = request.getParameter("out_trade_no");
            // 交易状态
            String trade_status = request.getParameter("trade_status");
            // 修改数据库
            //获取out_trade_no，获取orderNumber，进行修改
            out.println("success");
            out.flush();
        } else {
            System.out.println("异步通知失败");
            out.println("fail");
        }
    }

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这里通知支付宝，我收到了，返回success

还有一个重要问题，那就是微信公众号里面对支付宝支付是拦截

微信公众号平台无法使用支付宝支付的解决方案

将html文件和js文件放入项目中。