.net core 外观者设计模式 实现，多种支付选择

1，接口

  /// <summary>/// Web页面支付/// </summary>public interface IWebPagePay{public WebPagePayResult CreatePay(string productName, string orderSn, string totalPrice);}

2，实现接口

实现阿里支付

  public class AliPagePay : IWebPagePay{/// <summary>/// 创建支付/// </summary>/// <param name="productName"></param>/// <param name="orderSn"></param>/// <param name="totalPrice"></param>public WebPagePayResult CreatePay(string productName, string orderSn, string totalPrice){}}

实现微信支付

   public class WxNativePay : IWebPagePay{private readonly WxPayHttpClient _wxPayHttpClient;private const string nativeUrl = "https://api.mch.weixin.qq.com/v3/pay/transactions/native";// 支付接口private const string mchid = ""; // 商户Idprivate const string certpath = "/Pays/WxPay/certs/apiclient_cert.p12"; // 商户证书路径private const string certSerialNo = " "; // 证书序列号public IVirtualFileProvider _virtualFileProvider { set; get; }public WxNativePay(WxPayHttpClient wxPayHttpClient){_wxPayHttpClient = wxPayHttpClient;}/// <summary>/// 创建支付/// </summary>/// <param name="productName"></param>/// <param name="orderSn"></param>/// <param name="totalPrice"></param>public WebPagePayResult CreatePay(string productName, string orderSn, string totalPrice){}}

3，注入ico

  services.AddSingleton<IWebPagePay, AliPagePay>();// 支付宝封装类注册services.AddSingleton<IWebPagePay, WxNativePay>();// 微信支付封装

4.使用

使用 GetWebPagePay 根据pagetype 获取到具体的支付实例

 /// <summary>/// 支付接口选择/// </summary>public class WebPagePayFactory{private readonly Dictionary<string, IWebPagePay> _webPagePays =null;public WebPagePayFactory(IEnumerable<IWebPagePay> webPagePays){_webPagePays = webPagePays.ToDictionary(pay =>{return pay.GetType().Name; // AliPagePay  WxNativePay});}/// <summary>/// 获取WebPagePay支付/// </summary>/// <param name="pageType"></param>public IWebPagePay GetWebPagePay(string pageType){if (string.IsNullOrEmpty(pageType)){return _webPagePays["WxNativePay"];}return _webPagePays[pageType];}}