SpringBoot对接支付宝

• 需要先注册账号

  到支付宝开发者平台创建网页支付应用

• 启用公钥模式

  需要使用到appId和下面的两个秘钥

---

• 写配置信息的代码

  1.引入依赖

          <dependency>
              <groupId>com.alipay.sdk</groupId>
              <artifactId>alipay-easysdk</artifactId>
              <version>2.2.0</version>
          </dependency>

  2.写配置

  alipay:
    appId: appid
    appPrivateKey: 应用私钥
    alipayPublicKey: 支付宝的公钥
    notifyUrl: 回调地址

  3.新建一个alipayConfig类

  import com.alipay.easysdk.factory.Factory;
  import com.alipay.easysdk.kernel.Config;
  import org.springframework.boot.context.properties.ConfigurationProperties;
  import org.springframework.stereotype.Component;
  import javax.annotation.PostConstruct;
  
  @Data
  @Component
  //拿配置文件里面alipay开头的配置信息
  @ConfigurationProperties(prefix = "alipay")
  public class AliPayConfig {
      private String appId;
      private String appPrivateKey;
      private String alipayPublicKey;
      private String notifyUrl;
  @PostConstruct
  public void init() {
      // 设置参数（全局只需设置一次）
      Config config = new Config();
      config.protocol = "https";
      config.gatewayHost = "openapi.alipaydev.com";
      config.signType = "RSA2";
      config.appId = this.appId;
      config.merchantPrivateKey = this.appPrivateKey;
      config.alipayPublicKey = this.alipayPublicKey;
      config.notifyUrl = this.notifyUrl;
      Factory.setOptions(config);
      System.out.println("=======支付宝SDK初始化成功=======");
  }
  }

  4.写接口

      @GetMapping("/pay")
      public String pay(AliPay aliPay) {
          AlipayTradePagePayResponse response;
          try {
              //  发起API调用（以创建当面付收款二维码为例）
              response = Factory.Payment.Page()
                      .pay(URLEncoder.encode(aliPay.getSubject(), "UTF-8"), aliPay.getTraceNo(),String.valueOf(aliPay.getTotalAmount()), "");
          } catch (Exception e) {
              System.err.println("调用遭遇异常，原因：" + e.getMessage());
              throw new RuntimeException(e.getMessage(), e);
          }
          return response.getBody();
      }
  
  //如果设置了拦截器 需要放行该接口

  5.设置回调接口

   @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");
          // 支付宝验签
          if (Factory.Payment.Common().verifyNotify(params)) {
              // 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";
  }</code></pre></li>