支付宝支付开发——当面付条码支付和扫码支付实例

简介

本文将为您介绍如何利用支付宝支付API，实现当面付条码支付和扫码支付功能。通过本文的学习，您将了解到如何进行支付宝开发。

准备工作

1. 注册支付宝开发者账号并申请沙箱环境。
2. 在支付宝开发者平台创建应用，获取APPID和私钥、公钥。
3. 下载并安装alipay-sdk-java 或其他支持支付宝支付的SDK。
4. 了解支付宝开放API的使用文档，了解支付宝支付流程。

当面付条码支付

当面付条码支付，即商家使用支付宝扫描用户支付宝应用内的付款码，实现支付功能。

1. 商品订单生成

在实现支付功能之前，需要先生成一条商品订单。订单中需要包含商品名称、商品价格、商户订单号等信息。下面提供一个简单的订单生成样例：

    // 业务数据入参
    AlipayTradeCreateRequest request = new AlipayTradeCreateRequest();
    request.setBizContent("{\"out_trade_no\":\"" + outTradeNo + "\","
            + "\"seller_id\":\"" + sellerId + "\","
            + "\"total_amount\":\"" + totalAmount + "\","
            + "\"discountable_amount\":\"" + discountableAmount + "\","
            + "\"subject\":\"" + subject + "\","
            + "\"product_code\":\"" + productCode + "\"}");
    // 发送请求并获取响应
    AlipayTradeCreateResponse response = alipayClient.execute(request);
    // 获取商户订单号和二维码链接
    String out_trade_no = response.getOutTradeNo();
    String qrCode = response.getQrCode();

2. 生成当面付条码支付请求

在得到商户订单号和二维码链接后，需要调用API生成条码支付请求。具体实现方式如下:

    // 设置请求参数
    AlipayTradePayRequest request = new AlipayTradePayRequest();
    request.setNotifyUrl(notify_url);
    request.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
            + "\"scene\":\"" + "bar_code" + "\","
            + "\"auth_code\":\"" + authCode + "\","
            + "\"product_code\":\"" + "FACE_TO_FACE_PAYMENT" + "\","
            + "\"subject\":\"" + subject + "\","
            + "\"total_amount\":\"" + totalAmount + "\"}");
    // 发送请求并获取响应
    AlipayTradePayResponse response = alipayClient.execute(request);
    // 判断支付结果是否成功
    if (response.isSuccess()) {
        // TODO 支付成功后的逻辑处理
    } else {
        // TODO 支付失败后的逻辑处理
    }

3. 示例说明

假设商家店铺有一件价格为10元的商品，商品名称为“测试商品”，商户订单号为“123456789”，用户付款码为“286648345090195616”。

下面是完整代码示例：

// 配置参数
String serverUrl = "https://openapi.alipay.com/gateway.do";
String appId = "你的APPID";
String privateKey = "你的私钥";
String publicKey = "你的公钥";
String charset = "UTF-8";
String alipayPublicKey = "支付宝公钥";

// 定义支付宝客户端
AlipayClient alipayClient = new DefaultAlipayClient(serverUrl, appId, privateKey, "json", charset, alipayPublicKey, "RSA2");

// 订单信息
String out_trade_no = "123456789";
String subject = "测试商品";
String totalAmount = "10.00";
String discountableAmount = "0.00";
String sellerId = "";
String productCode = "FACE_TO_FACE_PAYMENT";

// 生成条码支付链接
AlipayTradeCreateRequest request = new AlipayTradeCreateRequest();
request.setBizContent("{\"out_trade_no\":\"" + outTradeNo + "\","
        + "\"seller_id\":\"" + sellerId + "\","
        + "\"total_amount\":\"" + totalAmount + "\","
        + "\"discountable_amount\":\"" + discountableAmount + "\","
        + "\"subject\":\"" + subject + "\","
        + "\"product_code\":\"" + productCode + "\"}");
AlipayTradeCreateResponse response = alipayClient.execute(request);
String qrCode = response.getQrCode();

// 条码支付
String authCode = "286648345090195616";
AlipayTradePayRequest request = new AlipayTradePayRequest();
request.setNotifyUrl(notify_url);
request.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
        + "\"scene\":\"" + "bar_code" + "\","
        + "\"auth_code\":\"" + authCode + "\","
        + "\"product_code\":\"" + productCode + "\","
        + "\"subject\":\"" + subject + "\","
        + "\"total_amount\":\"" + totalAmount + "\"}");
AlipayTradePayResponse response = alipayClient.execute(request);
if(response.isSuccess()){
    // TODO 支付成功后的逻辑处理
} else {
    // TODO 支付失败后的逻辑处理
}

当面付扫码支付

当面付扫码支付，即用户使用支付宝扫描商家的付款码进行支付。

1. 商户扫描支付宝用户付款码

在实现扫码支付功能之前，需要先通过APP或者刷卡设备等方式生成一条商户付款码。在用户使用支付宝扫商户码时，会生成一条用户付款码。商户需要通过用户付款码，向用户支付相应的金额。

下面是一个简单的商户扫描支付宝用户付款码的代码示例：

    // 定义支付宝客户端
    AlipayClient alipayClient = new DefaultAlipayClient(serverUrl, appId, privateKey, "json", charset, alipayPublicKey, "RSA2");

    // 生成商户付款码
    AlipayTradePayRequest request = new AlipayTradePayRequest();
    request.setNotifyUrl(notify_url);
    request.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
            + "\"scene\":\"" + "wave_code" + "\","
            + "\"subject\":\"" + subject + "\","
            + "\"total_amount\":\"" + totalAmount + "\"}");
    AlipayTradePayResponse response = alipayClient.execute(request);

    // 商户扫描用户付款码
    String authCode = "286648345090195616";
    request.setNotifyUrl(notify_url);
    request.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
            + "\"scene\":\"" + "bar_code" + "\","
            + "\"auth_code\":\"" + authCode + "\","
            + "\"product_code\":\"" + productCode + "\","
            + "\"subject\":\"" + subject + "\","
            + "\"total_amount\":\"" + totalAmount + "\"}");
    response = alipayClient.execute(request);

    // 判断支付结果是否成功
    if (response.isSuccess()) {
        // TODO 支付成功后的逻辑处理
    } else {
        // TODO 支付失败后的逻辑处理
    }

2. 示例说明

假设商家需要向用户支付10元，商户订单号为“123456789”，商户付款码为扫码设备中生产的付款码，用户使用支付宝扫描商户的付款码。

下面是完整代码示例：

// 配置参数
String serverUrl = "https://openapi.alipay.com/gateway.do";
String appId = "你的APPID";
String privateKey = "你的私钥";
String publicKey = "你的公钥";
String charset = "UTF-8";
String alipayPublicKey = "支付宝公钥";

// 定义支付宝客户端
AlipayClient alipayClient = new DefaultAlipayClient(serverUrl, appId, privateKey, "json", charset, alipayPublicKey, "RSA2");

// 订单信息
String out_trade_no = "123456789";
String subject = "测试商品";
String totalAmount = "10.00";
String sellerId = "";
String productCode = "FACE_TO_FACE_PAYMENT";

// 生成商户付款码
AlipayTradePayRequest request = new AlipayTradePayRequest();
request.setNotifyUrl(notify_url);
request.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
        + "\"scene\":\"" + "wave_code" + "\","
        + "\"subject\":\"" + subject + "\","
        + "\"total_amount\":\"" + totalAmount + "\"}");
AlipayTradePayResponse response = alipayClient.execute(request);

// 商户扫描用户付款码
String authCode = "286648345090195616";
request.setNotifyUrl(notify_url);
request.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
        + "\"scene\":\"" + "bar_code" + "\","
        + "\"auth_code\":\"" + authCode + "\","
        + "\"product_code\":\"" + productCode + "\","
        + "\"subject\":\"" + subject + "\","
        + "\"total_amount\":\"" + totalAmount + "\"}");
response = alipayClient.execute(request);
if(response.isSuccess()){
    // TODO 支付成功后的逻辑处理
} else {
    // TODO 支付失败后的逻辑处理
}

结语

本文介绍了支付宝支付API的使用方法，分别实现了当面付条码支付和扫码支付功能，并提供了相应的示例代码。希望对您有所帮助，在进行实际开发时，需要根据具体情况进行相关参数的配置。