添加日志系统和gitignore

.gitignore

@@ -0,0 +1,3 @@
+bin/
+obj/
+log/

Program.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Threading.Tasks;
 using MCSJ.Tools;
+using MCSJ.Tools.LogSystem;
 
 namespace MCSJ
 {
@@ -8,8 +9,15 @@ namespace MCSJ
     {
         static async Task Main(string[] args)
         {
+            // 验证日志目录
+            string logDir = LogCreator.GetLogDirectory();
+            Console.WriteLine($"日志目录: {logDir}");
+            LogMain.Debug($"日志文件: {LogCreator.GetLogFilePath()}");
+            
+            LogMain.Info("MC服务器下载工具启动");
             var versionManager = new VersionManager();
             var downloadService = new DownloadService(versionManager);
+            LogMain.Debug("服务初始化完成");
             
             while (true)
             {
@@ -20,21 +28,27 @@ namespace MCSJ
                 Console.Write("请选择操作: ");
                 
                 var input = Console.ReadLine();
+                LogMain.Debug($"用户选择操作: {input}");
                 
                 switch (input)
                 {
                     case "1":
                         versionManager.DisplayAllVersions();
+                        LogMain.Info("显示所有版本列表");
                         break;
                     case "2":
                         Console.Write("请输入要下载的版本名称: ");
                         var version = Console.ReadLine();
+                        LogMain.Info($"开始下载版本: {version}");
                         await downloadService.DownloadVersion(version);
+                        LogMain.Info($"版本下载完成: {version}");
                         break;
                     case "3":
+                        LogMain.Info("程序正常退出");
                         return;
                     default:
                         Console.WriteLine("无效输入，请重新选择");
+                        LogMain.Warn($"无效的用户输入: {input}");
                         break;
                 }
                 

Tools/log_systeam/log_creator.cs

@@ -0,0 +1,29 @@
+using System;
+using System.IO;
+
+namespace MCSJ.Tools.LogSystem
+{
+    public static class LogCreator
+    {
+        public static string GenerateLogFileName()
+        {
+            DateTime now = DateTime.Now;
+            return $"{now:yyyy-MM-dd-HH-mm-ss}.log";
+        }
+        
+        public static string GetLogDirectory()
+        {
+            string logDir = Path.Combine(Directory.GetCurrentDirectory(), "logs");
+            if (!Directory.Exists(logDir))
+            {
+                Directory.CreateDirectory(logDir);
+            }
+            return logDir;
+        }
+        
+        public static string GetLogFilePath()
+        {
+            return Path.Combine(GetLogDirectory(), GenerateLogFileName());
+        }
+    }
+}

Tools/log_systeam/log_main.cs

@@ -0,0 +1,37 @@
+using System;
+using System.IO;
+using System.Threading;
+
+namespace MCSJ.Tools.LogSystem
+{
+    public static class LogMain
+    {
+        private static readonly object _lock = new object();
+        
+        public enum LogLevel
+        {
+            DEBUG,
+            INFO,
+            WARN,
+            ERROR,
+            FATAL
+        }
+        
+        public static void Log(LogLevel level, string message)
+        {
+            string logEntry = $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] [{level}] {message}";
+            string logPath = LogCreator.GetLogFilePath();
+            
+            lock (_lock)
+            {
+                File.AppendAllText(logPath, logEntry + Environment.NewLine);
+            }
+        }
+        
+        public static void Debug(string message) => Log(LogLevel.DEBUG, message);
+        public static void Info(string message) => Log(LogLevel.INFO, message);
+        public static void Warn(string message) => Log(LogLevel.WARN, message);
+        public static void Error(string message) => Log(LogLevel.ERROR, message);
+        public static void Fatal(string message) => Log(LogLevel.FATAL, message);
+    }
+}