微信native支付对接

简介

Native支付是指商户系统按微信支付协议生成支付二维码，用户再用微信“扫一扫”完成支付的模式。

应用场景

Native支付适用于PC网站、实体店单品或订单、媒体广告支付等场景，用户扫描商户展示在各种场景的二维码进行支付。聚体步骤如下：

1.商户根据微信支付的规则，为不同商品生成不同的二维码，展示在各种场景，用于用户扫描购买
2.用户使用微信“扫一扫”扫描二维码后，获取商品支付信息，引导用户完成支付。
3.用户确认支付，输入支付密码
4.支付完成后会提示用户支付成功，商户后台得到支付成功的通知，然后进行发货处理

接入前准备

直接跳转微信支付商户平台 https://pay.weixin.qq.com/wiki/doc/apiv3/open/pay/chapter2_7_1.shtml

生成密钥文件：

配置文件：

wx:
  appId: appId
  keyPath: apiclient_key.pem
  certPath: apiclient_cert.pem
  certP12Path: 暂不用
  platformCertPath: platform_cert.pem
  mchId: mchId
  apiKey3: 暂不用
  apiKey: apiKey
  domain: https://hous.exchang.cn
  serialNo: 序列号

pom文件：

<dependency>
     <groupId>com.github.wechatpay-apiv3groupId>
     <artifactId>wechatpay-javaartifactId>
     <version>0.2.2version>
 dependency>

代码：

配置类：

//获取yml中微信配置
@Data
@ConfigurationProperties(prefix = "wx")
public class WechatProperties {
   

    private String appId;

    private String keyPath;

    private String certPath;

    private String platformCertPath;

    private String mchId;

    private String apiKey;

    private String domain;

    private String serialNo;
}
//配置类
@Configuration
@EnableConfigurationProperties(WechatProperties.class)
public class WechatNativeConfig {
   


    private final WechatProperties wechatProperties;

    public WechatNativeConfig(WechatProperties wechatProperties) {
   
        this.wechatProperties = wechatProperties;
    }

    @Bean
    public RSAConfig rsaConfig() throws IOException {
   
        ClassPathResource keyResource = new ClassPathResource(wechatProperties.getKeyPath());
        String apiClientKey = keyResource.getFile().getPath();
        ClassPathResource certResource = new ClassPathResource(wechatProperties.getPlatformCertPath());
        String platformCertResourceKey = certResource.getFile().getPath();
        /*String apiClientKey = wechatProperties.getKeyPath();
//        ClassPathResource certResource = new ClassPathResource(wechatProperties.getPlatformCertPath());
        String platformCertResourceKey = wechatProperties.getPlatformCertPath();*/
        return new RSAConfig.Builder()
                .merchantId(wechatProperties.getMchId())
                .privateKeyFromPath(apiClientKey)
                .merchantSerialNumber(wechatProperties.getSerialNo())
                //平台证书
                .wechatPayCertificatesFromPath(platformCertResourceKey)
                .build();
    }

    @Bean
    public NativePayService nativePayService() throws IOException {
   
        return new NativePayService.Builder()
                .config(this.rsaConfig())
                .build();
    }

    @Bean
    public NotificationParser notificationParser() throws IOException{
   
        ClassPathResource certResource = new ClassPathResource(wechatProperties.getPlatformCertPath());
        String platformCertResourceKey = certResource.getFile().getPath();
        //String platformCertResourceKey = wechatProperties.getPlatformCertPath();
        NotificationConfig config = new RSANotificationConfig.Builder()
                .apiV3Key(wechatProperties.getApiKey())
                .certificatesFromPath(platformCertResourceKey)
                .build();
        // 初始化 NotificationParser
        return new NotificationParser(config);

    }

    @Bean
    public RefundService refundService() throws IOException {
   
        return new RefundService.Builder().config(this.rsaConfig()).build();
    }

}

创建支付单：

	@Slf4j
@Service
@EnableConfigurationProperties(WechatProperties.class)
public class WechatNativePayServiceImpl implements BasePayService {
   

    @Resource
    private WechatProperties wechatProperties;

    @Resource
    private NativePayService nativePayService;

    @Resource
    private RedisCache redisCache;

    @Value("${spring.application.name:scm-ofc-system}")
    private String serviceName;


    @Override