add:

更新

backend/IM_API/Program.cs

@@ -7,6 +7,7 @@ using IM_API.Models;
 using IM_API.Tools;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.FileProviders;
 using Microsoft.IdentityModel.Tokens;
 using StackExchange.Redis;
 using System.Text;
@@ -42,7 +43,9 @@ namespace IM_API
             });
 
             builder.Services.AddRabbitMQ(configuration.GetSection("RabbitMqOptions").Get<RabbitMQOptions>());
-            
+
+            builder.Services.AddHttpContextAccessor();
+
             builder.Services.AddAllService(configuration);
 
             builder.Services.AddSignalR().AddJsonProtocol(options =>
@@ -134,6 +137,23 @@ namespace IM_API
 
             var app = builder.Build();
 
+            string uploadPath = Path.Combine(Directory.GetCurrentDirectory(), "Uploads","files");
+
+            // 2. 如果文件夹不存在则创建，防止程序启动报错
+            if (!Directory.Exists(uploadPath))
+            {
+                Directory.CreateDirectory(uploadPath);
+            }
+
+            // 3. 配置静态文件映射
+            app.UseStaticFiles(new StaticFileOptions
+            {
+                // 指定物理磁盘路径
+                FileProvider = new PhysicalFileProvider(uploadPath),
+                // 指定浏览器访问的虚拟前缀（例如：http://localhost:5000/files/1.jpg）
+                RequestPath = "/uploads/files"
+            });
+
             app.UseCors();
 
             // Configure the HTTP request pipeline.