✨ #1248 增加微信刷脸支付支持相关接口

* 增加获取微信刷脸调用凭证接口

* 增加微信刷脸接口
1. 获取刷脸支付凭证接口
2. 刷脸支付接口

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/WxPayService.java

@@ -704,4 +704,37 @@ public interface WxPayService {
    * @throws WxPayException the wx pay exception
    */
   String queryComment(WxPayQueryCommentRequest request) throws WxPayException;
+
+  /**
+   * <pre>
+   * 获取微信刷脸支付凭证.
+   * 接口请求链接：https://payapp.weixin.qq.com/face/get_wxpayface_authinfo
+   * 文档地址：https://pay.weixin.qq.com/wiki/doc/api/tools/sp_coupon.php?chapter=12_5
+   * </pre>
+   *
+   * @param request the request
+   * @return the wx pay get face authinfo result
+   * @throws WxPayException the wx pay exception
+   */
+  WxPayFaceAuthInfoResult getWxPayFaceAuthInfo(WxPayFaceAuthInfoRequest request) throws WxPayException;
+
+  /**
+   * <pre>
+   * 提交刷脸支付.
+   * 文档地址：https://share.weiyun.com/5dxUgCw
+   * 应用场景：
+   * 用户在商超，便利店，餐饮等场景，在屏幕上通过刷脸完成支付。
+   * 步骤1：用户在自助收银机上点击“刷脸支付”；
+   * 步骤2：发起人脸识别，摄像头自动抓取识别用户人脸，提示用户输入11位手机号码；
+   * 步骤3：商户收银系统提交刷脸支付；
+   * 步骤4：微信支付后台收到支付请求，验证人脸信息，返回支付结果给商户收银系统。
+   * 是否需要证书：不需要。
+   * </pre>
+   *
+   * @param request the request
+   * @return the wx pay facepay result
+   * @throws WxPayException the wx pay exception
+   */
+  WxPayFacepayResult facepay(WxPayFacepayRequest request) throws WxPayException;
+
 }

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java

@@ -788,4 +788,25 @@ public abstract class BaseWxPayServiceImpl implements WxPayService {
     return responseContent;
   }
 
+  @Override
+  public WxPayFaceAuthInfoResult getWxPayFaceAuthInfo(WxPayFaceAuthInfoRequest request) throws WxPayException {
+    request.checkAndSign(this.getConfig());
+    String url = "https://payapp.weixin.qq.com/face/get_wxpayface_authinfo";
+    String responseContent = this.post(url, request.toXML(), false);
+    WxPayFaceAuthInfoResult result = BaseWxPayResult.fromXML(responseContent, WxPayFaceAuthInfoResult.class);
+    result.checkResult(this, request.getSignType(), true);
+    return result;
+  }
+
+  @Override
+  public WxPayFacepayResult facepay(WxPayFacepayRequest request) throws WxPayException {
+    request.checkAndSign(this.getConfig());
+
+    String url = this.getPayBaseUrl() + "/pay/facepay";
+    String responseContent = this.post(url, request.toXML(), false);
+    WxPayFacepayResult result = BaseWxPayResult.fromXML(responseContent, WxPayFacepayResult.class);
+    result.checkResult(this, request.getSignType(), true);
+    return result;
+  }
+
 }