fix simapi cache

Helpers/SimApiCache.cs

@@ -8,7 +8,7 @@ public class SimApiCache(IDistributedCache cache)
     private const string Prefix = "SimApi:Cache:";
 
     /// <summary>
-    /// 设置缓存
+    /// 设置缓存 (值不能为null)
     /// </summary>
     /// <param name="key"></param>
     /// <param name="value"></param>
@@ -64,6 +64,6 @@ public class SimApiCache(IDistributedCache cache)
     public T? Get<T>(string key)
     {
         var data = cache.GetString(Prefix + key);
-        return data == null ? default : JsonSerializer.Deserialize<T>(data);
+        return data == null ? default : SimApiUtil.FromJson<T>(data);
     }
 }

Helpers/SimApiUtil.cs

@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Linq;
+using System.Net.Mail;
 using System.Reflection;
 using System.Security.Cryptography;
 using System.Text;
@@ -94,6 +95,25 @@ public static class SimApiUtil
         return regex.IsMatch(cell);
     }
 
+    /// <summary>
+    /// 判断是否是Email地址
+    /// </summary>
+    /// <param name="email"></param>
+    /// <returns></returns>
+    public static bool CheckEmail(string email)
+    {
+        try
+        {
+            var m = new MailAddress(email);
+            return m.Address == email;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+
     /// <summary>
     /// MD5加密字符串
     /// </summary>
@@ -154,6 +174,17 @@ public static class SimApiUtil
         return JsonSerializer.Serialize(obj, JsonOption);
     }
 
+    /// <summary>
+    /// 将JSON解析为对象（控制台输出中文不会被编码）
+    /// </summary>
+    /// <param name="jsonString"></param>
+    /// <typeparam name="T"></typeparam>
+    /// <returns></returns>
+    public static T? FromJson<T>(string jsonString)
+    {
+        return JsonSerializer.Deserialize<T>(jsonString, JsonOption);
+    }
+
     /// <summary>
     /// 分页
     /// </summary>