springboot 支付宝支付（花呗分期）

清疚 2023-07-24 05:48 2阅读 0赞

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### springboot 支付宝支付（花呗分期） ###

**应用：用户账单金额实时支付给商家，用户分期偿还账单至花呗**

**官方文档：[https://opendocs.alipay.com/open/277/105952][https_opendocs.alipay.com_open_277_105952]**

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**引入 jar 包**

<dependency>
        <groupId>com.alipay.sdk</groupId>
        <artifactId>alipay-sdk-java</artifactId>
        <version>4.9.100.ALL</version>
    </dependency>

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**示例**

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**配置文件**

**application.yml**

alipay:
      appid: 2016092500591327
      gatewayUrl: https://openapi.alipaydev.com/gateway.do
      format: JSON
      charset: utf-8
      signType: RSA2
      returnUrl: http://byvrwj.natappfree.cc/return
      notifyUrl: http://byvrwj.natappfree.cc/notify
      app-private-key: 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
      alipay-public-key: MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1ynoaKrpzpipzhsivNwIRBrEPMeFYLWkWSMU9E3KAdBBpSGHN9x3OVWYe/F3yxRgLtbOdqN1DBYiKLUBvUu2NAqH1KV6nkt3Rx/gc7MKMwL+TWBmXKX5L1eK17TOPKMXoqVN5grFrCH0hx/U6lZnr2M/7A93yPlSKLgJwVYj560wzElBL+fvjR0V0OA+FWJryKluBtJYUKXBadFKuyVwNnyGqmHFxvtSHuErhOrg0YiYIfhV3f7zE5q1mIz7ecwH0W7nB7gtFjLt1k4WSpwyeEI8Xpl7SLMvHdwEXUwTU0h/V7TumYWgUe0ft70NTps+zPwJlmcEluHg0VSs7UrDVQIDAQAB

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**config 层**

**AlipayProperties**

@Data
    @Component
    @ConfigurationProperties("alipay")
    public class AlipayProperties {
     
        private String appId;
        private String gatewayUrl;
        private String format;
        private String charset;
        private String signType;
        private String appPrivateKey;
        private String alipayPublicKey;
     
        private String returnUrl;
        private String notifyUrl;
    }

**AlipayConfig：创建AlipayClient**

@Configuration
    public class AlipayConfig {
     
        @Resource
        private AlipayProperties alipayProperties;
     
        @Bean
        public AlipayClient initAlipayClient(){
            return new DefaultAlipayClient(alipayProperties.getGatewayUrl(),
                    alipayProperties.getAppId(),alipayProperties.getAppPrivateKey(),
                    alipayProperties.getFormat(),alipayProperties.getCharset(),
                    alipayProperties.getAlipayPublicKey(),alipayProperties.getSignType());
        }
    }

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**controller 层**

**AlipayController**

@RestController
    public class AlipayController {
    
        @Resource
        private AlipayClient alipayClient;
    
        @Resource
        private AlipayProperties alipayProperties;
    
        @RequestMapping("/pagePay")
        public String pagePay(){
            AlipayTradePagePayModel model=new AlipayTradePagePayModel();
            model.setOutTradeNo("108");
            model.setProductCode("FAST_INSTANT_TRADE_PAY");
            model.setSubject("海贼王");
            model.setTotalAmount("100");
            model.setTimeoutExpress("1h");
    
            ExtendParams extendParams=new ExtendParams();      //拓展参数
            extendParams.setHbFqNum("3");                      //花呗分期数，支持3、6、12
            extendParams.setHbFqSellerPercent("100");          //分期手续费，0表示用户承担，100表示商户承担
            model.setExtendParams(extendParams);
            
            AlipayTradePagePayRequest request=new AlipayTradePagePayRequest();
            request.setBizModel(model);
            request.setReturnUrl(alipayProperties.getReturnUrl());
            request.setNotifyUrl(alipayProperties.getNotifyUrl());
    
            AlipayTradePagePayResponse response=null;
            try{
                response= alipayClient.pageExecute(request);
            }catch (Exception e){
                e.printStackTrace();
            }
    
            assert response != null;
            return response.getBody();
        }
    
        @RequestMapping("/notify")
        public void notify(HttpServletRequest request) throws Exception{
            if (check(request.getParameterMap())){
                System.out.println(request.getParameter("trade_status"));
                System.out.println("异步通知 "+ Instant.now());
            }else {
                System.out.println("验签失败");
            }
        }
        
        @RequestMapping("/return")
        public String returnUrl(HttpServletRequest request) throws Exception{
            if (check(request.getParameterMap())){
                return "success";
            }else {
                return "false";
            }
        }
    
        private boolean check(Map<String,String[]> requestParams) throws Exception{
            Map<String,String> params = new HashMap<>();
    
            for (String name : requestParams.keySet()) {
                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] + ",";
                }
    
                params.put(name, valueStr);
                System.out.println(name+" ==> "+valueStr);
            }
    
            return AlipaySignature.rsaCheckV1(params, alipayProperties.getAlipayPublicKey(),
                    alipayProperties.getCharset(), alipayProperties.getSignType()); //调用SDK验证签名
        }
    }

[https_opendocs.alipay.com_open_277_105952]: https://opendocs.alipay.com/open/277/105952