NotificationConfig notificationConfig = new RSANotificationConfig.Builder()
        // 注意这里必须是 收资商户号的ApiV3Key
        .apiV3Key(WechatpayConfig.API_V3_KEY)
        // 注意这里必须是 收资商户生成的对应平台证书
        .certificatesFromPath(WechatpayConfig.CERTIFICATES_PATH)
        .build();

NotificationParser parser = new NotificationParser(notificationConfig);