支付宝支付整体流程，包括验签【同步】【异步】

一、前期准备

1、支付宝开放平台沙箱账号，用于测试

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应用公钥需要使用支付宝第三方工具生成,最好在本地备份好，公钥以及配对的密钥

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2、javasdk的maven仓库

javasdk

3、内网穿透，使内网能够被支付宝的服务器访问

支付成功后支付宝需要回调咱们服务器的端口，必须保证自己的服务器能被外网访问
穿透教程

二、流程图

主要流程：

用户下单请求商户系统
商户系统构造支付请求，发送给支付宝
支付宝展示支付信息，用户支付
支付结果由支付宝回调给商户创建好的接口
商户根据支付结果业务操作，并在最后将订单信息返回给用户

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三、代码编写

1、依赖导入
springboot thymeleaf alipa-sdk-java

![在这里插入图片描述](https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL2p3LXN0YXIvbXlGaWd1cmViZWQvbWFzdGVyL2ltZy8yMDE5MTIxMTE0NDc1OS5wbmc?x-oss-process=image/format,png)

2、创建请求公共参数的类 AlipayConfig


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,开发时使用沙箱提供的APPID，生产环境改成自己的APPID
    public static String APP_ID = "2016101600700789";  //沙箱的
    //public static String APP_ID = "2019120669659570";
    // 商户私钥，您的PKCS8格式RSA2私钥
    public static String APP_PRIVATE_KEY = "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";
   // public static String APP_PRIVATE_KEY ="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";

    // 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。
    public static String ALIPAY_PUBLIC_KEY="MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAkE5K/L+l166zCpgLZ5EQRf9f32lNII8xtIJzTiBJaRgYAb2HnW3ZAEnpLNeWl8s5PxWsa6tNtqlrjSG8smNHDmbgF9pF1pLjhbCoe1tMizeuUvX6wypnPH3k2dM5Z4ffyLyvXw8rqO28CUegNLnDtc7U6dq5YhSlntTph3DB5EKL6iNSCs8PtblKwAA108I5beV8lvV75QkkXMU1jdpbA013swBAptyLxTsb/NoUB4eUmjr+uwrhavHoWbolFID2v9MuZ0GYb7TpiBEQSns+VaHi7pJpYXsL+bwSoteKAD+cG2vH8NI5HggMn3eXH6hOFtZ5jsm4NOZ0WgKOjo38UwIDAQAB";
    //public static String ALIPAY_PUBLIC_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhvCnEvUMjsa7N1CybrtIdMY74o1JVyspZqv5Q5yj/8uyaE5LSG+7hFhQZpkJgHFNdKJsICfEKpK95MoKAm9uOV4+p7R7i7FMjVKh8yX6bf4auQXQLa3KeTJ/GSQpw1Z+5cSivyzBb2v+d4dt9MgJj04j6cCo2g9wjYsQ/wpRn/BMdDtA7nUaKfa15gJLz4q/1MYlIjALjnMeXIJXqZdDvBLuQ3JMEAgv6jfFxbU6U71L6ayA1OFdc1RFUrz4SXryOk9Ogoz77/DWCF4fcCZenx/zsBhTUXbl5GDy6/KFeMoU2WkVhFC9N/kG5aAiUTihjHQI3w3APAGAbJZkFJg/iwIDAQAB";

    // 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://gojw.xyz/notify";

    // 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(其实就是支付成功后返回的页面)
    public static String return_url = "http://gojw.xyz/return";

    // 签名方式
    public static String sign_type = "RSA2";

    // 字符编码格式
    public static String CHARSET = "utf-8";

    // 支付宝网关，
    public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";

    // 日志输出地方
    public static String log_path = "C:\\";


//↑↑↑↑↑↑↑↑↑↑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();
                }
            }
        }
    }
}

3、支付控制层PayController


@Controller
public class PayController {
    //获得初始化的AlipayClient
    AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.APP_ID, AlipayConfig.APP_PRIVATE_KEY, "json", AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.sign_type);
    @RequestMapping("/pay")
    @ResponseBody
    public String payController(String WIDout_trade_no,String WIDsubject,String WIDtotal_amount,String WIDbody) {//创建支付请求
        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = WIDout_trade_no;
        //付款金额，必填
        String total_amount =WIDtotal_amount;
        //订单名称，必填
        String subject = WIDsubject;
        //商品描述，可空
        String body = WIDbody;

        alipayRequest.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
                + "\"total_amount\":\"" + total_amount + "\","
                + "\"subject\":\"" + subject + "\","
                + "\"body\":\"" + body + "\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求
        String form = "";
        try {
            form = alipayClient.pageExecute(alipayRequest).getBody(); //调用SDK生成表单
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        return  form;

    }
    @ResponseBody
    @RequestMapping("/dingdanLook")
    public String dingdanChaxun(){//查看订单信息
        //设置请求参数
        AlipayTradeQueryRequest alipayTradeQueryRequest = new AlipayTradeQueryRequest();
        alipayTradeQueryRequest.setBizContent("{" +
                "    \"out_trade_no\":\"201503s240440010101002\"  " +//商户订单号
                "}"  );
        String body="";
        try {
            body = alipayClient.execute(alipayTradeQueryRequest).getBody();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        return body;
    }
    @ResponseBody
    @PostMapping("/notify")                   //异步验签接口
    public String notifyer(HttpServletRequest request) throws AlipayApiException {
        boolean b = mysignVerified(request);
        if (b){
        System.out.println("异步验签成功");
        //修改数据库订单状态
        return "success";
    }else {
        System.out.println("异步验签失败");
        return "failure";
    }
}
    @GetMapping(value = "/return")            //同步验签接口
    public String returner(HttpServletRequest request) throws AlipayApiException {
        boolean b = mysignVerified(request);
        if (b){
            System.out.println("同步验签成功-跳转到成功后页面");
            //修改数据库订单状态
            return "/success";
        }else {
            System.out.println("同步验签失败-跳转到充值页面让用户重新充值");
            return "/error";
        }
    }
    /*
    *   验签方法
    * */
    public boolean mysignVerified(HttpServletRequest request) throws AlipayApiException {
        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 = iter.next();
            String[] values = 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"), "gbk");
            params.put(name, valueStr);
        }
        //String out_trade_no = request.getParameter("out_trade_no");// 商户订单号
        return AlipaySignature.rsaCheckV1(params, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.CHARSET, AlipayConfig.sign_type); //调用SDK验证签名
    }


    @RequestMapping("/")
    public String toTest(){
        return "index";
    }
}

4、前台页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/pay" method="post">
    订单号：<input type="text" name="WIDout_trade_no" required><br/>
    订单名称：<input type="text" name="WIDsubject" required><br/>
    付款金额：<input type="text" name="WIDtotal_amount" required><br/>
    WIDbody：<input type="text" name="WIDbody"><br/>
    <input type="submit" value="下单"> <input type="reset" value="重置">
</form>
</body>
</html>

来源：CSDN

作者：食之无味,弃之可惜

链接：https://blog.csdn.net/qq_39846820/article/details/103491718

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支付宝支付接口