diff --git a/src/main/java/com/example/playertime/PlayerTimeMod.java b/src/main/java/com/example/playertime/PlayerTimeMod.java
new file mode 100644
index 0000000..e5d5eb7
--- /dev/null
+++ b/src/main/java/com/example/playertime/PlayerTimeMod.java
@@ -0,0 +1,64 @@
+package com.example.playertime;
+
+import net.fabricmc.api.ModInitializer;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class PlayerTimeMod implements ModInitializer {
+    public static final Logger LOGGER = LoggerFactory.getLogger("PlayerTimeTracker");
+    private static PlayerTimeTracker timeTracker;
+    private static WebServer webServer;
+
+    @Override
+    public void onInitialize() {
+        try {
+            LOGGER.info("[在线时间] 初始化玩家在线时长视奸MOD");
+
+            ServerLifecycleEvents.SERVER_STARTING.register(server -> {
+                LOGGER.info("[在线时间] 服务器启动 - 初始化跟踪器");
+                timeTracker = new PlayerTimeTracker(server);
+
+                try {
+                    webServer = new WebServer(timeTracker, 60048);
+                    webServer.start();
+                    LOGGER.info("[在线时间] 在线时长Web服务器启动在端口60048");
+                } catch (Exception e) {
+                    LOGGER.error("[在线时间] 无法启动 Web 服务器", e);
+                    throw new RuntimeException("[在线时间] Web 服务器启动失败", e);
+                }
+            });
+
+            ServerPlayConnectionEvents.JOIN.register((handler, sender, server) -> {
+                if (timeTracker != null) {
+                    timeTracker.onPlayerJoin(handler.player);
+                }
+            });
+
+            ServerPlayConnectionEvents.DISCONNECT.register((handler, server) -> {
+                if (timeTracker != null) {
+                    timeTracker.onPlayerLeave(handler.player);
+                }
+            });
+
+            ServerLifecycleEvents.SERVER_STOPPING.register(server -> {
+                LOGGER.info("[在线时间] 服务器停止 - 保存数据");
+                if (webServer != null) {
+                    webServer.stop();
+                }
+                if (timeTracker != null) {
+                    timeTracker.saveAll();
+                }
+            });
+
+        } catch (Exception e) {
+            LOGGER.error("[在线时间] Mod 初始化失败!", e);
+            throw new RuntimeException("[在线时间] Mod 初始化失败", e);
+        }
+    }
+
+    public static PlayerTimeTracker getTimeTracker() {
+        return timeTracker;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/playertime/PlayerTimeTracker.java b/src/main/java/com/example/playertime/PlayerTimeTracker.java
new file mode 100644
index 0000000..c766fd3
--- /dev/null
+++ b/src/main/java/com/example/playertime/PlayerTimeTracker.java
@@ -0,0 +1,236 @@
+package com.example.playertime;
+
+import com.google.gson.*;
+import com.mojang.authlib.GameProfile;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.network.ServerPlayerEntity;
+
+import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.Instant;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class PlayerTimeTracker {
+    private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
+    private final MinecraftServer server;
+    private final Path dataFile;
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private final Map<UUID, PlayerTimeData> playerData = new ConcurrentHashMap<>();
+
+    public PlayerTimeTracker(MinecraftServer server) {
+        this.server = server;
+        this.dataFile = server.getRunDirectory().resolve("player_time_data.json");
+        loadData();
+    }
+
+    private boolean isWhitelisted(String playerName) {
+        MinecraftServer server = this.server;
+        if (server == null) return false;
+
+        return server.getPlayerManager().getWhitelist()
+                .isAllowed(server.getUserCache().findByName(playerName).orElse(null));
+    }
+
+
+    public void onPlayerJoin(ServerPlayerEntity player) {
+        PlayerTimeData data = playerData.computeIfAbsent(player.getUuid(), uuid -> new PlayerTimeData());
+        data.lastLogin = Instant.now().getEpochSecond();
+        saveAsync(player.getUuid());
+    }
+
+    public void onPlayerLeave(ServerPlayerEntity player) {
+        PlayerTimeData data = playerData.get(player.getUuid());
+        if (data != null) {
+            long now = Instant.now().getEpochSecond();
+            long sessionTime = now - data.lastLogin;
+            data.totalTime += sessionTime;
+
+            // 维护30天滚动窗口
+            data.rolling30Days.addPlayTime(now, sessionTime);
+            data.rolling7Days.addPlayTime(now, sessionTime);
+
+            data.lastLogin = 0;
+            saveAsync(player.getUuid());
+        }
+    }
+
+    public PlayerTimeStats getPlayerStats(UUID uuid) {
+        PlayerTimeData data = playerData.get(uuid);
+        if (data == null) {
+            return null;
+        }
+
+        long now = Instant.now().getEpochSecond();
+        PlayerTimeStats stats = new PlayerTimeStats();
+        stats.totalTime = data.totalTime;
+
+        // 如果玩家在线，添加当前会话时间
+        if (data.lastLogin > 0) {
+            stats.totalTime += (now - data.lastLogin);
+        }
+
+        stats.last30Days = data.rolling30Days.getTotalTime(now);
+        stats.last7Days = data.rolling7Days.getTotalTime(now);
+
+        return stats;
+    }
+
+    public Map<String, String> getWhitelistedPlayerStats() {
+        Map<String, String> stats = new LinkedHashMap<>(); // 保持插入顺序
+        long now = Instant.now().getEpochSecond();
+
+        // 获取白名单玩家名称列表
+        List<String> whitelistedNames = List.of(server.getPlayerManager()
+                .getWhitelist()
+                .getNames());
+
+        playerData.forEach((uuid, data) -> {
+            // 获取玩家名称
+            String playerName = getPlayerName(uuid);
+
+            // 只处理白名单玩家
+            if (whitelistedNames.contains(playerName)) {
+                long totalTime = data.totalTime;
+                if (data.lastLogin > 0) {
+                    totalTime += (now - data.lastLogin);
+                }
+
+                stats.put(playerName, "总时长: " + formatTime(totalTime) +
+                        " | 30天: " + formatTime(data.rolling30Days.getTotalTime(now)) +
+                        " | 7天: " + formatTime(data.rolling7Days.getTotalTime(now)));
+            }
+        });
+
+        return stats;
+    }
+
+    private String getPlayerName(UUID uuid) {
+        // 尝试获取在线玩家
+        ServerPlayerEntity player = server.getPlayerManager().getPlayer(uuid);
+        if (player != null) {
+            return player.getName().getString();
+        }
+
+        // 尝试从用户缓存获取 - 现在正确处理Optional
+        Optional<GameProfile> profile = server.getUserCache().getByUuid(uuid);
+        if (profile.isPresent()) {
+            return profile.get().getName();
+        }
+
+        return "Unknown";
+    }
+
+    private void loadData() {
+        if (!Files.exists(dataFile)) {
+            return;
+        }
+
+        try (Reader reader = Files.newBufferedReader(dataFile)) {
+            JsonObject root = JsonParser.parseReader(reader).getAsJsonObject();
+            for (Map.Entry<String, JsonElement> entry : root.entrySet()) {
+                UUID uuid = UUID.fromString(entry.getKey());
+                playerData.put(uuid, GSON.fromJson(entry.getValue(), PlayerTimeData.class));
+            }
+        } catch (Exception e) {
+            PlayerTimeMod.LOGGER.error("无法加载玩家在线时间数据", e);
+        }
+    }
+
+    public void saveAll() {
+        JsonObject root = new JsonObject();
+        playerData.forEach((uuid, data) -> {
+            root.add(uuid.toString(), GSON.toJsonTree(data));
+        });
+
+        try (Writer writer = Files.newBufferedWriter(dataFile)) {
+            GSON.toJson(root, writer);
+        } catch (Exception e) {
+            PlayerTimeMod.LOGGER.error("无法保存玩家在线时间数据", e);
+        }
+    }
+
+    private void saveAsync(UUID uuid) {
+        executor.execute(() -> {
+            JsonObject root;
+            try {
+                if (Files.exists(dataFile)) {
+                    try (Reader reader = Files.newBufferedReader(dataFile)) {
+                        root = JsonParser.parseReader(reader).getAsJsonObject();
+                    }
+                } else {
+                    root = new JsonObject();
+                }
+            } catch (Exception e) {
+                root = new JsonObject();
+            }
+
+            PlayerTimeData data = playerData.get(uuid);
+            if (data != null) {
+                root.add(uuid.toString(), GSON.toJsonTree(data));
+            }
+
+            try (Writer writer = Files.newBufferedWriter(dataFile)) {
+                GSON.toJson(root, writer);
+            } catch (Exception e) {
+                PlayerTimeMod.LOGGER.error("无法保存" + uuid + "的在线时间数据", e);
+            }
+        });
+    }
+
+    public static String formatTime(long seconds) {
+        long hours = seconds / 3600;
+        long minutes = (seconds % 3600) / 60;
+        return String.format("%dh %02dm", hours, minutes);
+    }
+
+    private static class PlayerTimeData {
+        long totalTime = 0;
+        long lastLogin = 0;
+        RollingTimeWindow rolling30Days = new RollingTimeWindow(30);
+        RollingTimeWindow rolling7Days = new RollingTimeWindow(7);
+    }
+
+    public static class PlayerTimeStats {
+        public long totalTime;
+        public long last30Days;
+        public long last7Days;
+    }
+
+    private static class RollingTimeWindow {
+        private final int days;
+        private final List<TimeEntry> entries = new ArrayList<>();
+
+        public RollingTimeWindow(int days) {
+            this.days = days;
+        }
+
+        public void addPlayTime(long timestamp, long seconds) {
+            entries.add(new TimeEntry(timestamp, seconds));
+            cleanUp(timestamp);
+        }
+
+        public long getTotalTime(long currentTime) {
+            cleanUp(currentTime);
+            return entries.stream().mapToLong(e -> e.seconds).sum();
+        }
+
+        private void cleanUp(long currentTime) {
+            long cutoff = currentTime - (days * 24 * 3600);
+            entries.removeIf(entry -> entry.timestamp < cutoff);
+        }
+
+        private static class TimeEntry {
+            final long timestamp;
+            final long seconds;
+
+            TimeEntry(long timestamp, long seconds) {
+                this.timestamp = timestamp;
+                this.seconds = seconds;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/playertime/WebServer.java b/src/main/java/com/example/playertime/WebServer.java
new file mode 100644
index 0000000..309c954
--- /dev/null
+++ b/src/main/java/com/example/playertime/WebServer.java
@@ -0,0 +1,111 @@
+package com.example.playertime;
+
+import com.google.gson.Gson;
+import com.sun.net.httpserver.HttpServer;
+import com.sun.net.httpserver.HttpHandler;
+import com.sun.net.httpserver.HttpExchange;
+
+import java.io.*;
+import java.net.InetSocketAddress;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.*;
+import java.util.*;
+import java.util.concurrent.*;
+
+public class WebServer {
+    private final HttpServer server;
+    private final PlayerTimeTracker timeTracker;
+    private final ExecutorService executor = Executors.newFixedThreadPool(4);
+    private static final Map<String, String> MIME_TYPES = Map.of(
+            "html", "text/html",
+            "css", "text/css",
+            "js", "application/javascript",
+            "json", "application/json"
+    );
+
+    public WebServer(PlayerTimeTracker timeTracker, int port) throws IOException {
+        this.timeTracker = timeTracker;
+        this.server = HttpServer.create(new InetSocketAddress(port), 0);
+        setupContexts();
+    }
+
+    private void setupContexts() {
+        // API 端点
+        // 在 WebServer.java 中修改 /api/stats 的处理
+        server.createContext("/api/stats", exchange -> {
+            if (!"GET".equals(exchange.getRequestMethod())) {
+                sendResponse(exchange, 405, "Method Not Allowed");
+                return;
+            }
+
+            try {
+                // 改为使用新的白名单统计方法
+                Map<String, String> stats = timeTracker.getWhitelistedPlayerStats();
+                String response = new Gson().toJson(stats);
+                sendResponse(exchange, 200, response.getBytes(), "application/json");
+            } catch (Exception e) {
+                PlayerTimeMod.LOGGER.error("Failed to get stats", e);
+                sendResponse(exchange, 500, "Internal Server Error");
+            }
+        });
+
+        // 静态文件服务
+        server.createContext("/", exchange -> {
+            try {
+                String path = exchange.getRequestURI().getPath();
+                if (path.equals("/")) path = "/index.html";
+
+                // 从资源目录加载文件
+                String resourcePath = "assets/playertime/web" + path;
+                InputStream is = getClass().getClassLoader().getResourceAsStream(resourcePath);
+
+                if (is == null) {
+                    sendResponse(exchange, 404, "Not Found");
+                    return;
+                }
+
+                // 确定内容类型
+                String extension = path.substring(path.lastIndexOf('.') + 1);
+                String contentType = MIME_TYPES.getOrDefault(extension, "text/plain");
+
+                // 读取文件内容
+                ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+                byte[] data = new byte[1024];
+                int nRead;
+                while ((nRead = is.read(data, 0, data.length)) != -1) {
+                    buffer.write(data, 0, nRead);
+                }
+                buffer.flush();
+
+                sendResponse(exchange, 200, buffer.toByteArray(), contentType);
+            } catch (Exception e) {
+                PlayerTimeMod.LOGGER.error("Failed to serve resource", e);
+                sendResponse(exchange, 500, "Internal Server Error");
+            }
+        });
+
+        server.setExecutor(executor);
+    }
+
+    private void sendResponse(HttpExchange exchange, int code, String response) throws IOException {
+        sendResponse(exchange, code, response.getBytes(StandardCharsets.UTF_8), "text/plain");
+    }
+
+    private void sendResponse(HttpExchange exchange, int code, byte[] response, String contentType) throws IOException {
+        exchange.getResponseHeaders().set("Content-Type", contentType);
+        exchange.sendResponseHeaders(code, response.length);
+        try (OutputStream os = exchange.getResponseBody()) {
+            os.write(response);
+        }
+    }
+
+    public void start() {
+        server.start();
+    }
+
+    public void stop() {
+        server.stop(0);
+        executor.shutdown();
+    }
+}
\ No newline at end of file
diff --git a/src/main/resources/assets/playertime/web/css/style.css b/src/main/resources/assets/playertime/web/css/style.css
new file mode 100644
index 0000000..c2d0856
--- /dev/null
+++ b/src/main/resources/assets/playertime/web/css/style.css
@@ -0,0 +1,77 @@
+body {
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+    margin: 0;
+    padding: 0;
+    background-color: #f5f5f5;
+    color: #333;
+}
+
+.container {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 20px;
+}
+
+h1 {
+    color: #2c3e50;
+    text-align: center;
+    margin-bottom: 30px;
+}
+
+.controls {
+    margin-bottom: 20px;
+    text-align: center;
+}
+
+button {
+    background-color: #3498db;
+    color: white;
+    border: none;
+    padding: 10px 20px;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 16px;
+    transition: background-color 0.3s;
+}
+
+button:hover {
+    background-color: #2980b9;
+}
+
+.stats-container {
+    background-color: white;
+    border-radius: 8px;
+    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+    overflow: hidden;
+}
+
+table {
+    width: 100%;
+    border-collapse: collapse;
+}
+
+th, td {
+    padding: 12px 15px;
+    text-align: left;
+    border-bottom: 1px solid #ddd;
+}
+
+th {
+    background-color: #3498db;
+    color: white;
+}
+
+tr:hover {
+    background-color: #f1f1f1;
+}
+
+tr:nth-child(even) {
+    background-color: #f9f9f9;
+}
+
+@media (max-width: 768px) {
+    table {
+        display: block;
+        overflow-x: auto;
+    }
+}
\ No newline at end of file
diff --git a/src/main/resources/assets/playertime/web/index.html b/src/main/resources/assets/playertime/web/index.html
new file mode 100644
index 0000000..6e59c39
--- /dev/null
+++ b/src/main/resources/assets/playertime/web/index.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>[在线时间] 玩家在线时间</title>
+  <link rel="stylesheet" href="css/style.css">
+</head>
+<body>
+<div class="container">
+  <h1>KSE玩家在线时间统计</h1>
+  <div class="controls">
+    <button id="refresh-btn">刷新数据</button>
+    <p class="info-note">仅跟踪和显示列入白名单的玩家</p>
+  </div>
+  <div class="stats-container">
+    <table id="stats-table">
+      <thead>
+      <tr>
+        <th>玩家</th>
+        <th>总计时间</th>
+        <th>最近 30 天</th>
+        <th>最近 7 天</th>
+      </tr>
+      </thead>
+      <tbody></tbody>
+    </table>
+  </div>
+</div>
+<script src="js/app.js"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/resources/assets/playertime/web/js/app.js b/src/main/resources/assets/playertime/web/js/app.js
new file mode 100644
index 0000000..47ee957
--- /dev/null
+++ b/src/main/resources/assets/playertime/web/js/app.js
@@ -0,0 +1,65 @@
+document.addEventListener('DOMContentLoaded', function() {
+    const refreshBtn = document.getElementById('refresh-btn');
+    const statsTable = document.getElementById('stats-table').getElementsByTagName('tbody')[0];
+
+    // 初始加载数据
+    loadStats();
+
+    // 刷新按钮点击事件
+    refreshBtn.addEventListener('click', loadStats);
+
+    // 加载统计数据
+    function loadStats() {
+        fetch('/api/stats')
+            .then(response => response.json())
+            .then(data => {
+                updateTable(data);
+            })
+            .catch(error => {
+                console.error('Error fetching stats:', error);
+                alert('Failed to load player stats. Check console for details.');
+            });
+    }
+
+    // 更新表格数据
+    function updateTable(statsData) {
+        const statsTable = document.getElementById('stats-table').getElementsByTagName('tbody')[0];
+        statsTable.innerHTML = '';
+
+        // 新数据格式是 { "玩家名": "统计信息", ... }
+        Object.entries(statsData).forEach(([playerName, statString]) => {
+            const row = statsTable.insertRow();
+
+            // 玩家名列
+            const nameCell = row.insertCell(0);
+            nameCell.textContent = playerName;
+
+            // 解析统计信息
+            const stats = {};
+            statString.split(" | ").forEach(part => {
+                const [label, value] = part.split(": ");
+                stats[label.trim()] = value;
+            });
+
+            // 总时长列
+            const totalCell = row.insertCell(1);
+            totalCell.textContent = stats["总时长"];
+
+            // 30天列
+            const thirtyCell = row.insertCell(2);
+            thirtyCell.textContent = stats["30天"];
+
+            // 7天列
+            const sevenCell = row.insertCell(3);
+            sevenCell.textContent = stats["7天"];
+        });
+    }
+
+    // 辅助函数：将"Xh Ym"格式的时间转换为分钟数
+    function parseTime(timeStr) {
+        const [hPart, mPart] = timeStr.split(' ');
+        const hours = parseInt(hPart.replace('h', ''));
+        const minutes = parseInt(mPart.replace('m', ''));
+        return hours * 60 + minutes;
+    }
+});
\ No newline at end of file
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
new file mode 100644
index 0000000..e498df0
--- /dev/null
+++ b/src/main/resources/fabric.mod.json
@@ -0,0 +1,24 @@
+{
+  "schemaVersion": 1,
+  "id": "playertime",
+  "version": "${version}",
+  "name": "玩家在线时长统计Mod",
+  "description": "",
+  "authors": [],
+  "contact": {},
+  "license": "MIT",
+  "environment": "server",
+  "entrypoints": {
+    "main": [
+      "com.example.playertime.PlayerTimeMod"
+    ]
+  },
+  "mixins": [
+    "playertime.mixins.json"
+  ],
+  "depends": {
+    "fabricloader": ">=${loader_version}",
+    "fabric": "*",
+    "minecraft": "${minecraft_version}"
+  }
+}
diff --git a/src/main/resources/playertime.mixins.json b/src/main/resources/playertime.mixins.json
new file mode 100644
index 0000000..5f09377
--- /dev/null
+++ b/src/main/resources/playertime.mixins.json
@@ -0,0 +1,8 @@
+{
+  "required": true,
+  "package": "com.example.playertime.mixins",
+  "compatibilityLevel": "JAVA_21",
+  "injectors": {
+    "defaultRequire": 1
+  }
+}
\ No newline at end of file