springboot集成支付宝的支付(通用版)

• [1.引依赖]

        <dependency>
            <groupId>com.alipay.sdk</groupId>
            <artifactId>alipay-sdk-java</artifactId>
            <version>4.33.44.ALL</version>
        </dependency>

• [2.写配置]

alipay:
#沙箱里的appId
  appId:
#私钥
  appPrivateKey:
#支付宝公钥
  alipayPublicKey:
#回调地址
  notifyUrl:

public interface AliPayParam {
    String GATEWAY_URL = "https://openapi.alipaydev.com/gateway.do";
    String FORMAT = "JSON";
    String CHARSET = "UTF-8";
    //签名方式
    String SIGN_TYPE = "RSA2";
}

@Component
@ConfigurationProperties(prefix = "alipay")
//取配置文件内以"alipay"开头的数据
public class AliPayConfig {
    private String appId;
    private String appPrivateKey;
    private String alipayPublicKey;
    private String notifyUrl;
}

//一个接受参数的实体类
@Data
public class AliPay {
    //订单号
    private String traceNo;
    //订单总价格
    private Double totalAmount;
    //订单名称
    private String subject;
    //支付宝的订单号
    private String alipayTraceNo;
}

• [3.controller的代码]

点击查看代码

@RestController
@RequestMapping("alipay")
public class AliPayControllerEdition {

    @Resource
    private AliPayConfig aliPayConfig;

//支付的接口
    @GetMapping("/pay") // &subject=xxx&traceNo=xxx&totalAmount=xxx
    public void pay(AliPay aliPay, HttpServletResponse httpResponse) throws IOException {
        // 1. 创建Client，通用SDK提供的Client，负责调用支付宝的API
        AlipayClient alipayClient = new DefaultAlipayClient(AliPayParam.GATEWAY_URL, aliPayConfig.getAppId(),
                aliPayConfig.getAppPrivateKey(), AliPayParam.FORMAT, AliPayParam.CHARSET, aliPayConfig.getAlipayPublicKey(), AliPayParam.SIGN_TYPE);

        // 2. 创建 Request并设置Request参数
        AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();  // 发送请求的 Request类
        request.setNotifyUrl(aliPayConfig.getNotifyUrl());
        Map<String, Object> map = new HashMap<>();
        map.put("out_trade_no", aliPay.getTraceNo());  // 我们自己生成的订单编号
        map.put("total_amount", aliPay.getTotalAmount()); // 订单的总金额
        map.put("subject", aliPay.getSubject());   // 支付的名称
        map.put("product_code", "FAST_INSTANT_TRADE_PAY");  // 固定配置
        String s = new ObjectMapper().writeValueAsString(map);
        request.setBizContent(s);

        // 执行请求，拿到响应的结果，返回给浏览器
        String form = "";
        try {
            form = alipayClient.pageExecute(request).getBody(); // 调用SDK生成表单
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        httpResponse.setContentType("text/html;charset=" + AliPayParam.CHARSET);
        httpResponse.getWriter().write(form);// 直接将完整的表单html输出到页面
        httpResponse.getWriter().flush();
        httpResponse.getWriter().close();
    }

//回调接口
    @PostMapping("/notify")  // 注意这里必须是POST接口
    public String payNotify(HttpServletRequest request) throws Exception {
        if (request.getParameter("trade_status").equals("TRADE_SUCCESS")) {
            System.out.println("=========支付宝异步回调========");
            Map<String, String> params = new HashMap<>();
            Map<String, String[]> requestParams = request.getParameterMap();
            for (String name : requestParams.keySet()) {
                params.put(name, request.getParameter(name));
                // System.out.println(name + " = " + request.getParameter(name));
            }
            String tradeNo = params.get("out_trade_no");
            String gmtPayment = params.get("gmt_payment");
            String alipayTradeNo = params.get("trade_no");
            String sign = params.get("sign");
            String content = AlipaySignature.getSignCheckContentV1(params);
            boolean checkSignature = AlipaySignature.rsa256CheckContent(content, sign, aliPayConfig.getAlipayPublicKey(), "UTF-8"); // 验证签名
            // 支付宝验签
            if (checkSignature) {
                // 验签通过
                System.out.println("交易名称: " + params.get("subject"));
                System.out.println("交易状态: " + params.get("trade_status"));
                System.out.println("支付宝交易凭证号: " + params.get("trade_no"));
                System.out.println("商户订单号: " + params.get("out_trade_no"));
                System.out.println("交易金额: " + params.get("total_amount"));
                System.out.println("买家在支付宝唯一id: " + params.get("buyer_id"));
                System.out.println("买家付款时间: " + params.get("gmt_payment"));
                System.out.println("买家付款金额: " + params.get("buyer_pay_amount"));
                // 更新订单未已支付
                //ordersMapper.updateState(tradeNo, "已支付", gmtPayment, alipayTradeNo);
            }
        }
        return "success";
    }

    @GetMapping("/return")
    public String returnPay(AliPay aliPay) throws AlipayApiException, JsonProcessingException {
//        7天无理由退款
//        Orders orders = ordersMapper.getByNo(aliPay.getTraceNo());
//        if (orders != null) {
//            // hutool工具类，判断时间间隔
//            long between = DateUtil.between(DateUtil.parseDateTime(orders.getPaymentTime()), DateUtil.parseDateTime(now), DateUnit.DAY);
//            if (between > 7) {
//                return Result.error("-1", "该订单已超过7天，不支持退款");
//            }
//        }
        // 1. 创建Client，通用SDK提供的Client，负责调用支付宝的API
        AlipayClient alipayClient = new DefaultAlipayClient(AliPayParam.GATEWAY_URL,
                aliPayConfig.getAppId(), aliPayConfig.getAppPrivateKey(), AliPayParam.FORMAT, AliPayParam.CHARSET,
                aliPayConfig.getAlipayPublicKey(), AliPayParam.SIGN_TYPE);
        // 2. 创建 Request，设置参数
        AlipayTradeRefundRequest request = new AlipayTradeRefundRequest();
        Map<String, Object> map = new HashMap<>();
        map.put("trade_no", aliPay.getAlipayTraceNo());
        map.put("refund_amount", aliPay.getTotalAmount());
        map.put("out_request_no", aliPay.getTraceNo());
        // 返回参数选项，按需传入
        //JSONArray queryOptions = new JSONArray();
        //queryOptions.add("refund_detail_item_list");
        //bizContent.put("query_options", queryOptions);
        String s = new ObjectMapper().writeValueAsString(map);
        request.setBizContent(s);
        // 3. 执行请求
        AlipayTradeRefundResponse response = alipayClient.execute(request);
        if (response.isSuccess()) {  // 退款成功，isSuccess 为true
            System.out.println("调用成功");
            // 4. 更新数据库状态
            //ordersMapper.updatePayState(aliPay.getTraceNo(), "已退款", now);
            return "成功";
        } else {   // 退款失败，isSuccess 为false
            System.out.println(response.getBody());
            return "失败";
        }
    }
}