diff --git a/Falcon.SugarApi/ApiDefinistions/ApiControllerBase.cs b/Falcon.SugarApi/ApiDefinistions/ApiControllerBase.cs
index 11bd30a..93452ff 100644
--- a/Falcon.SugarApi/ApiDefinistions/ApiControllerBase.cs
+++ b/Falcon.SugarApi/ApiDefinistions/ApiControllerBase.cs
@@ -39,11 +39,14 @@ namespace Falcon.SugarApi.ApiDefinistions
                 return $":{con}:{ac}";
             }
         }
-
+        /// <summary>
+        /// 构造控制器基类
+        /// </summary>
+        /// <param name="service"></param>
         protected ApiControllerBase(IServiceProvider service) {
             this.Services = service;
-            this.Logger = service.GetService(typeof(ILogger<>).MakeGenericType(GetType())) as ILogger;
-            this.SugarDb = service.GetService<SugarDbContext>();
+            this.Logger = service.GetService(typeof(ILogger<>).MakeGenericType(GetType())) as ILogger ?? throw new NullReferenceException("ILogger");
+            this.SugarDb = service.GetService<SugarDbContext>() ?? throw new NullReferenceException("SugarDbContext");
         }
 
         /// <summary>
@@ -77,7 +80,7 @@ namespace Falcon.SugarApi.ApiDefinistions
         /// <typeparam name="T">对象的类型</typeparam>
         /// <param name="json">json字符串</param>
         /// <returns>对象实例</returns>
-        protected T JsonDeserialize<T>(string json) {
+        protected T? JsonDeserialize<T>(string json) where T: class {
             return JsonSerializer.Deserialize<T>(json);
         }