springboot集成支付宝的支付(easy版)

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";
      }