springboot2 integrates Alipay payment

springboot2 integrates Alipay payment

1. Introduce pom dependencies

 		<dependency>
            <groupId>com.alipay.sdk</groupId>
            <artifactId>alipay-sdk-java</artifactId>
            <version>4.10.0.ALL</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>

2. Configure the private key and Alipay public key in the configuration file ( note not the Alipay application public key )

alipay:
  appid: XXXXXXXXXXXXX
  gatewayUrl: https://openapi.alipay.com/gateway.do  （正式环境网关，若用沙箱环境，需要更改）
  format: json
  charset: utf-8
  signType: RSA2
  returnUrl: http://XXXXXXXXXXXXXXXX/alipay/return（同步回调，不需要配置，只要路径正确，本地可以访问即可）
  notifyUrl: http://XXXXXXXXXXXXX/alipay/notify（异步回调，需要在支付宝上配置路径，外网可访问）
  app-private-key: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  alipay-public-key: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

3. Alipay configuration class

@Component
public class AlipayConfig {
    
    

    // 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号
    @Value("${alipay.appid}")
    public String app_id;

    // 商户私钥，您的PKCS8格式RSA2私钥
    @Value("${alipay.app-private-key}")
    public String merchant_private_key;
    // 支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。

    @Value("${alipay.alipay-public-key}")
    public String alipay_public_key;

    // 服务器异步通知页面路径  需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
    //public static String notify_url = "http://工程公网访问地址/alipay.trade.page.pay-JAVA-UTF-8/notify_url.jsp";
    @Value("${alipay.notifyUrl}")
    public String notify_url ;

    // 页面跳转同步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
   // public static String return_url = "http://工程公网访问地址/alipay.trade.page.pay-JAVA-UTF-8/return_url.jsp";

    @Value("${alipay.returnUrl}")
    public String return_url ;

    // 签名方式
    @Value("${alipay.signType}")
    public String sign_type;

    // 字符编码格式
    @Value("${alipay.charset}")
    public String charset;

    // 支付宝网关
    @Value("${alipay.gatewayUrl}")
    public String gatewayUrl;


    @Value("${alipay.format}")
    public String format;

    // 支付宝网关
    @Value("${alipay.logs}")
    public static String log_path;

    //↑↑↑↑↑↑↑↑↑↑请在这里配置您的基本信息↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

    /**
     * 写日志，方便测试（看网站需求，也可以改成把记录存入数据库）
     * @param sWord 要写入日志里的文本内容
     */
    public static void logResult(String sWord) {
    
    
        FileWriter writer = null;
        try {
    
    
            writer = new FileWriter(log_path + "alipay_log_" + System.currentTimeMillis()+".txt");
            writer.write(sWord);
        } catch (Exception e) {
    
    
            e.printStackTrace();
        } finally {
    
    
            if (writer != null) {
    
    
                try {
    
    
                    writer.close();
                } catch (IOException e) {
    
    
                    e.printStackTrace();
                }
            }
        }
    }
}

4. controller

生成支付宝支付二维码：
  @PostMapping("/gotoPayPage")
    @ResponseBody
    public void gotoPayPage(){
    
    
        AlipayTradePagePayRequest pagePayRequest=new AlipayTradePagePayRequest();
        //SDK 公共请求类，包含公共请求参数，以及封装了签名与验签，开发者无需关注签名与验签
        AlipayClient alipayClient = new DefaultAlipayClient(alipayConfig.gatewayUrl,alipayConfig.app_id,alipayConfig.merchant_private_key, alipayConfig.format,
                alipayConfig.charset, alipayConfig.alipay_public_key, alipayConfig.sign_type);

            pagePayRequest.setReturnUrl(alipayConfig.return_url);
            pagePayRequest.setNotifyUrl(alipayConfig.notify_url);

            // 订单模型
            String productCode = "FAST_INSTANT_TRADE_PAY";
            //商户订单号
            String orderNo = “订单号”;
            //付款金额
            String totalFee  = “付款金额，以元为单位”;
            //订单名称
            String subject = "456";
            //商品描述
            String body = "123";
            AlipayTradePayModel model = new AlipayTradePayModel();
            model.setOutTradeNo(orderNo);
            model.setProductCode(productCode);
            model.setTotalAmount(totalFee);
            model.setSubject("subject");
           // model.setBody("body");
            pagePayRequest.setBizModel(model);
            //请求
            String form = "";
        try {
    
    
            //String result = alipayClient.pageExecute(pagePayRequest).getBody();
            AlipayTradePagePayResponse payResponse = alipayClient.pageExecute(pagePayRequest);
            form = payResponse.getBody();
            response.setContentType("text/html;charset="+alipayConfig.charset);
            response.getWriter().write(form);
            response.getWriter().flush();
            response.getWriter().close();
        }catch (Exception e){
    
    
            e.printStackTrace();
            throw new RuntimeException("支付宝二维码数据生成失败");
        }

    }
2、支付宝同步回调方法
 /**
     * 支付宝支付后同步回调方法
     * @param request
     * @param response
     */
    @GetMapping("/return")
    public String returnCallback(HttpServletRequest request, HttpServletResponse response){
    
    
        System.out.println("**************************同步回调方法执行*******************************************");
        //获取支付宝GET过来反馈信息
        Map<String,String> params = new HashMap<String,String>();
        Map requestParams = request.getParameterMap();
        try {
    
    
            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。如果mysign和sign不相等也可以使用这段代码转化
                valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
                params.put(name, valueStr);
            }
            System.out.println("params---------->"+params);
            //调用SDK验证签名
            boolean signVerified = AlipaySignature.rsaCheckV1(params,alipayConfig.alipay_public_key, alipayConfig.charset, alipayConfig.sign_type);
            if (signVerified){
    
    
                //商户订单号
                String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
                //支付宝交易号
                String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");
                //付款金额
                String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");
                //TODO 将支付宝返回的数据记录到数据库中
                //1、根据订单号查询订单是否存在，
                //2、根据支付宝返回的trade_status状态进行下一步要操作，成功：更新订单状态，
                //response.getWriter().write("success");
                return "success";
            }else {
    
    
                return "fail";
               // response.getWriter().write("fail");
            }

        }catch (Exception e){
    
    
            e.printStackTrace();
            throw new RuntimeException("回调异常");
        }
    }
3、异步回调
  /**
     * 支付订单后异步回调方法
     * @param request
     * @param response
     * @return
     */
    @PostMapping("/notify")
    @ResponseBody
    public String notifyUrl(HttpServletRequest request,HttpServletResponse response){
    
    
        //获取支付宝POST过来反馈信息
        Map<String,String> params = new HashMap<String,String>();
        Map<String,String[]> requestParams = request.getParameterMap();
        try {
    
    
            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] + ",";
                }
                //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);
            }
            System.out.println("支付宝支付返回参数params-------->"+params);
            boolean signVerified = AlipaySignature.rsaCheckV1(params, alipayConfig.alipay_public_key, alipayConfig.charset, alipayConfig.sign_type); //调用SDK验证签名
            System.out.println("signVerified----->"+signVerified);
            PrintWriter out = null;
            if (signVerified){
    
    
                //商户订单号  orderNo
                String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
                //支付宝交易号
                String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");
                //买家支付宝交易账号
                String buyer_id = new String(request.getParameter("buyer_id").getBytes("ISO-8859-1"),"UTF-8");
                //交易总金额
                String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");
                //实收金额
                String receipt_amount = new String(request.getParameter("receipt_amount").getBytes("ISO-8859-1"),"UTF-8");
                //付款金额
                String buyer_pay_amount = new String(request.getParameter("buyer_pay_amount").getBytes("ISO-8859-1"),"UTF-8");
                //交易时间
                String gmt_create = new String(request.getParameter("gmt_create").getBytes("ISO-8859-1"),"UTF-8");
                //交易付款时间
                String gmt_payment = new String(request.getParameter("gmt_payment").getBytes("ISO-8859-1"),"UTF-8");
                //获取appid
                String app_id = new String(request.getParameter("app_id").getBytes("ISO-8859-1"),"UTF-8");
                //交易状态
                String trade_status = new String(request.getParameter("trade_status").getBytes("ISO-8859-1"),"UTF-8");

                //根据订单查询该订单是否存在
                if (memberOrder == null){
    
    
                    throw new AlipayApiException("out_trade_no错误");
                }
                //判断支付金额是否正确
                if (!total_amount.equals(memberOrder.getTotalFee().toString())){
    
    
                    throw new AlipayApiException("error total_amount");
                }
                //判断appid是否一致
                if (!app_id.equals(alipayConfig.app_id)){
    
    
                    throw new AlipayApiException("app_id不一致");
                }
                System.out.println("trade_status------------>"+trade_status);
                if(trade_status.equals("TRADE_FINISHED")){
    
                    
                    //判断该笔订单是否在商户网站中已经做过处理
                    //如果没有做过处理，根据订单号（out_trade_no）在商户网站的订单系统中查到该笔订单的详细，并执行商户的业务程序
                    //如果有做过处理，不执行商户的业务程序

                    //注意：
                    //退款日期超过可退款期限后（如三个月可退款），支付宝系统发送该交易状态通知
                }else if (trade_status.equals("TRADE_SUCCESS")){
    
    //向支付宝订单记录表中添加数据
                    //判断该笔订单是否在商户网站中已经做过处理
                    //如果没有做过处理，根据订单号（out_trade_no）在商户网站的订单系统中查到该笔订单的详细，并执行商户的业务程序
                    //如果有做过处理，不执行商户的业务程序
                    //注意：
                    //付款完成后，支付宝系统发送该交易状态通知
                }
                //response.getOutputStream().print("success");
                return "success";
                //
            }else {
    
    //验签失败
               // response.getOutputStream().print("failure");
                return "failure";
            }
        }catch (AlipayApiException e) {
    
    
            System.out.println(e.getErrMsg());
            throw new RuntimeException("调用支付宝接口发生异常");
        } catch (UnsupportedEncodingException e) {
    
    
            System.out.println(e.getMessage());
            throw new RuntimeException("URLDecoderf发生异常");
        } /*catch (IOException e) {
            System.out.println(e.getMessage());
            throw new RuntimeException("IO发生异常");
        }*/
    }
    4、订单查询
    @GetMapping("/query")
    @ResponseBody
    public String query(String orderNo, String tradeNo){
    
    
        if (StringUtils.isBlank(orderNo)){
    
    
            throw new RuntimeException("订单号不能为空");
        }
        //SDK 公共请求类，包含公共请求参数，以及封装了签名与验签，开发者无需关注签名与验签
        AlipayClient alipayClient = new DefaultAlipayClient(alipayConfig.gatewayUrl,alipayConfig.app_id,alipayConfig.merchant_private_key, alipayConfig.format,
                alipayConfig.charset, alipayConfig.alipay_public_key, alipayConfig.sign_type);
        AlipayTradeQueryRequest alipay_request = new AlipayTradeQueryRequest();
        AlipayTradeQueryModel model=new AlipayTradeQueryModel();
        model.setOutTradeNo(orderNo);
        model.setTradeNo(tradeNo);
        alipay_request.setBizModel(model);
        String form = "";
        try {
    
    
            AlipayTradeQueryResponse alipay_response =alipayClient.execute(alipay_request);
            form = alipay_response.getBody();
            System.out.println("form----->"+form);
            return form;
        }catch (AlipayApiException e){
    
    
            e.printStackTrace();
            throw new RuntimeException("支付宝查询交易数据失败");
        }
    }

Note: Asynchronous callbacks, synchronous callbacks, and queries must be allowed and not intercepted.