diff --git a/app/Controllers/AdminController.php b/app/Controllers/AdminController.php
index c8230e13..15b5943c 100644
--- a/app/Controllers/AdminController.php
+++ b/app/Controllers/AdminController.php
@@ -102,7 +102,7 @@ class AdminController extends BaseController
         $action = isset($_GET['action']) ? $_GET['action'] : "";
 
         if ($action == "color") {
-            Utils::checkPost(['color_scheme']);
+            Validate::checkPost(['color_scheme']);
 
             $color_scheme = str_replace('_', '-', $_POST['color_scheme']);
             \Option::set('color_scheme', $color_scheme);
@@ -118,7 +118,7 @@ class AdminController extends BaseController
             throw new E('用户不存在', 1);
 
         if ($action == "email") {
-            Utils::checkPost(['email']);
+            Validate::checkPost(['email']);
 
             if (!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
                 View::json('邮箱格式错误', 3);
@@ -128,7 +128,7 @@ class AdminController extends BaseController
                 View::json('邮箱修改成功', 0);
 
         } if ($action == "nickname") {
-            Utils::checkPost(['nickname']);
+            Validate::checkPost(['nickname']);
 
             if (Utils::convertString($_POST['nickname']) != $_POST['nickname'])
                 View::json('无效的昵称。昵称中包含了奇怪的字符。', 1);
@@ -137,15 +137,15 @@ class AdminController extends BaseController
                 View::json('昵称已成功设置为 '.$_POST['nickname'], 0);
 
         } else if ($action == "password") {
-            Utils::checkPost(['password']);
+            Validate::checkPost(['password']);
 
-            if (\Validate::checkValidPwd($_POST['password'])) {
+            if (\Validate::password($_POST['password'])) {
                 if ($user->changePasswd($_POST['password']))
                     View::json('密码修改成功', 0);
             }
 
         } else if ($action == "score") {
-            Utils::checkPost(['score']);
+            Validate::checkPost(['score']);
 
             if ($user->setScore($_POST['score']))
                     View::json('积分修改成功', 0);
@@ -205,7 +205,7 @@ class AdminController extends BaseController
         $player = new Player(Utils::getValue('pid', $_POST));
 
         if ($action == "preference") {
-            Utils::checkPost(['preference']);
+            Validate::checkPost(['preference']);
 
             if ($_POST['preference'] != "default" && $_POST['preference'] != "slim")
                 View::json('无效的参数', 0);
@@ -214,7 +214,7 @@ class AdminController extends BaseController
                 View::json('角色 '.$player->player_name.' 的优先模型已更改至 '.$_POST['preference'], 0);
 
         } elseif ($action == "texture") {
-            Utils::checkPost(['model', 'tid']);
+            Validate::checkPost(['model', 'tid']);
 
             if ($_POST['model'] != "steve" && $_POST['model'] != "alex" && $_POST['model'] != "cape")
                 View::json('无效的参数', 0);
@@ -226,7 +226,7 @@ class AdminController extends BaseController
                 View::json('角色 '.$player->player_name.' 的材质修改成功', 0);
 
         } elseif ($action == "owner") {
-            Utils::checkPost(['uid']);
+            Validate::checkPost(['uid']);
 
             if (!is_numeric($_POST['uid']))
                 View::json('无效的参数', 0);
diff --git a/app/Controllers/AuthController.php b/app/Controllers/AuthController.php
index 47be47f9..145ed239 100644
--- a/app/Controllers/AuthController.php
+++ b/app/Controllers/AuthController.php
@@ -7,6 +7,7 @@ use App\Models\UserModel;
 use App\Exceptions\E;
 use Mail;
 use View;
+use Utils;
 use Option;
 
 class AuthController extends BaseController
@@ -20,8 +21,8 @@ class AuthController extends BaseController
     {
         $user = new User($_POST['email']);
 
-        if (\Utils::getValue('login_fails', $_SESSION) > 3) {
-            if (strtolower(\Utils::getValue('captcha', $_POST)) != strtolower($_SESSION['phrase']))
+        if (Utils::getValue('login_fails', $_SESSION) > 3) {
+            if (strtolower(Utils::getValue('captcha', $_POST)) != strtolower($_SESSION['phrase']))
                 View::json('验证码填写错误', 1);
         }
 
@@ -75,14 +76,14 @@ class AuthController extends BaseController
 
     public function handleRegister()
     {
-        if (strtolower(\Utils::getValue('captcha', $_POST)) != strtolower($_SESSION['phrase']))
+        if (strtolower(Utils::getValue('captcha', $_POST)) != strtolower($_SESSION['phrase']))
             View::json('验证码填写错误', 1);
 
         $user = new User($_POST['email']);
 
         if (!$user->is_registered) {
             if (Option::get('user_can_register') == 1) {
-                if (\Validate::checkValidPwd($_POST['password'])) {
+                if (\Validate::password($_POST['password'])) {
                     // If amount of registered accounts of IP is more than allowed mounts,
                     // then reject the registration.
                     if (count(UserModel::where('ip', \Http::getRealIP())->get()) < Option::get('regs_per_ip')) {
@@ -119,7 +120,7 @@ class AuthController extends BaseController
 
     public function handleForgot()
     {
-        if (strtolower(\Utils::getValue('captcha', $_POST)) != strtolower($_SESSION['phrase']))
+        if (strtolower(Utils::getValue('captcha', $_POST)) != strtolower($_SESSION['phrase']))
             View::json('验证码填写错误', 1);
 
         if ($_ENV['MAIL_HOST'] == "")
@@ -140,7 +141,7 @@ class AuthController extends BaseController
              ->subject('重置您在 '.Option::get('site_name').' 上的账户密码');
 
         $uid = $user->uid;
-        $token = base64_encode($user->getToken().substr(time(), 4, 6).\Utils::generateRndString(16));
+        $token = base64_encode($user->getToken().substr(time(), 4, 6).Utils::generateRndString(16));
 
         $url = Option::get('site_url')."/auth/reset?uid={$uid}&token=$token";
         $content = View::make('auth.mail')->with('reset_url', $url)->render();
@@ -182,9 +183,9 @@ class AuthController extends BaseController
 
     public function handleReset()
     {
-        \Utils::checkPost(['uid', 'password']);
+        \Validate::checkPost(['uid', 'password']);
 
-        if (\Validate::checkValidPwd($_POST['password'])) {
+        if (\Validate::password($_POST['password'])) {
             $user = new User('', $_POST['uid']);
 
             $user->changePasswd($_POST['password']);
diff --git a/app/Controllers/ClosetController.php b/app/Controllers/ClosetController.php
index 07848554..aa41ed41 100644
--- a/app/Controllers/ClosetController.php
+++ b/app/Controllers/ClosetController.php
@@ -44,7 +44,7 @@ class ClosetController extends BaseController
 
     public function add()
     {
-        \Utils::checkPost(['tid', 'name']);
+        \Validate::checkPost(['tid', 'name']);
 
         if ($this->closet->add($_POST['tid'], $_POST['name'])) {
             $t = Texture::find($_POST['tid']);
diff --git a/app/Controllers/PlayerController.php b/app/Controllers/PlayerController.php
index f73d3f81..877111ec 100644
--- a/app/Controllers/PlayerController.php
+++ b/app/Controllers/PlayerController.php
@@ -36,7 +36,7 @@ class PlayerController extends BaseController
         if (!isset($player_name))
             View::json('你还没有填写要添加的角色名哦', 1);
 
-        if (!\Validate::checkValidPlayerName($player_name))
+        if (!\Validate::playerName($player_name))
         {
             $msg = "无效的角色名。角色名只能包含" . ((Option::get('allow_chinese_playername') == "1") ? "汉字、" : "")."字母、数字以及下划线";
             View::json($msg, 2);
@@ -85,7 +85,7 @@ class PlayerController extends BaseController
         if (!$new_player_name)
             throw new E('Invalid parameters', 1);
 
-        if (!\Validate::checkValidPlayerName($new_player_name))
+        if (!\Validate::playerName($new_player_name))
         {
             $msg = "无效的角色名。角色名只能包含" . ((Option::get('allow_chinese_playername') == "1") ? "汉字、" : "")."字母、数字以及下划线";
             View::json($msg, 2);
diff --git a/app/Controllers/SkinlibController.php b/app/Controllers/SkinlibController.php
index 80db98fa..42bb8a09 100644
--- a/app/Controllers/SkinlibController.php
+++ b/app/Controllers/SkinlibController.php
@@ -169,7 +169,7 @@ class SkinlibController extends BaseController
 
     public function delete()
     {
-        \Utils::checkPost(['tid']);
+        \Validate::checkPost(['tid']);
 
         $result = Texture::find($_POST['tid']);
 
@@ -208,8 +208,8 @@ class SkinlibController extends BaseController
     }
 
     public function rename() {
-        \Utils::checkPost(['tid', 'new_name']);
-        \Validate::checkValidTextureName($_POST['new_name']);
+        \Validate::checkPost(['tid', 'new_name']);
+        \Validate::textureName($_POST['new_name']);
 
         $t = Texture::find($_POST['tid']);
 
@@ -227,7 +227,7 @@ class SkinlibController extends BaseController
 
     private function checkUpload($type)
     {
-        \Validate::checkValidTextureName(Utils::getValue('name', $_POST));
+        \Validate::textureName(Utils::getValue('name', $_POST));
 
         if (!Utils::getValue('file', $_FILES))
             View::json('你还没有选择任何文件哟', 1);
diff --git a/app/Controllers/UserController.php b/app/Controllers/UserController.php
index 6a571e31..7ad9866b 100644
--- a/app/Controllers/UserController.php
+++ b/app/Controllers/UserController.php
@@ -11,12 +11,12 @@ use View;
 class UserController extends BaseController
 {
     private $action = "";
-    private $user = null;
+    private $user   = null;
 
     function __construct()
     {
         $this->action = isset($_GET['action']) ? $_GET['action'] : "";
-        $this->user = new User($_SESSION['email']);
+        $this->user   = new User($_SESSION['email']);
     }
 
     public function index()
@@ -62,7 +62,7 @@ class UserController extends BaseController
             if (!$this->user->checkPasswd($_POST['current_password']))
                 View::json('原密码错误', 1);
 
-            if (\Validate::checkValidPwd($_POST['new_password'])) {
+            if (\Validate::password($_POST['new_password'])) {
                 if ($this->user->changePasswd($_POST['new_password']))
                     View::json('密码修改成功，请重新登录', 0);
             }
diff --git a/app/Middlewares/CheckPostMiddleware.php b/app/Middlewares/CheckPostMiddleware.php
index bc16530d..bec717fb 100644
--- a/app/Middlewares/CheckPostMiddleware.php
+++ b/app/Middlewares/CheckPostMiddleware.php
@@ -13,7 +13,7 @@ class CheckPostMiddleware implements IMiddleware
     public function handle(Request $request)
     {
         if (isset($_POST['email']) && $_POST['email'] != "") {
-            if (!Validate::checkValidEmail($_POST['email'])) {
+            if (!Validate::email($_POST['email'])) {
                 View::json('邮箱格式错误', 3);
             }
 
diff --git a/app/Services/Utils.php b/app/Services/Utils.php
index 2cde38e1..1f35e7b7 100644
--- a/app/Services/Utils.php
+++ b/app/Services/Utils.php
@@ -21,7 +21,7 @@ class Utils
      *
      * @param  string $key
      * @param  array $array
-     * @return object
+     * @return string|boolean
      */
     public static function getValue($key, $array) {
         if (array_key_exists($key, $array)) {
@@ -52,12 +52,4 @@ class Utils
         return ($timestamp == 0) ? date('Y-m-d H:i:s') : date('Y-m-d H:i:s', $timestamp);
     }
 
-    public static function checkPost(Array $keys)
-    {
-        foreach ($keys as $key) {
-            if (!isset($_POST[$key]))
-                throw new E('Invalid parameters.', 1);
-        }
-    }
-
 }
diff --git a/app/Services/Validate.php b/app/Services/Validate.php
index 09d57371..e8ee512c 100644
--- a/app/Services/Validate.php
+++ b/app/Services/Validate.php
@@ -6,19 +6,33 @@ use App\Exceptions\E;
 
 class Validate
 {
-    public static function checkValidEmail($email)
+    /**
+     * Check POST values in a simple way
+     *
+     * @param  array  $keys
+     * @return void
+     */
+    public static function checkPost(Array $keys)
+    {
+        foreach ($keys as $key) {
+            if (!isset($_POST[$key]))
+                throw new E('Invalid parameters.', 1);
+        }
+    }
+
+    public static function email($email)
     {
         return filter_var($email, FILTER_VALIDATE_EMAIL);
     }
 
-    public static function checkValidPlayerName($player_name)
+    public static function playerName($player_name)
     {
         $regx = (Option::get('allow_chinese_playername') == "1") ?
                 "/^([A-Za-z0-9\x{4e00}-\x{9fa5}_]+)$/u" : "/^([A-Za-z0-9_]+)$/";
         return preg_match($regx, $player_name);
     }
 
-    public static function checkValidTextureName($texture_name)
+    public static function textureName($texture_name)
     {
         if (strlen($texture_name) > 32 || strlen($texture_name) < 1) {
             throw new E('无效的材质名称。材质名长度应该小于 32。', 2);
@@ -28,11 +42,11 @@ class Validate
         return true;
     }
 
-    public static function checkValidPwd($passwd)
+    public static function password($password)
     {
-        if (strlen($passwd) > 16 || strlen($passwd) < 8) {
+        if (strlen($password) > 16 || strlen($password) < 8) {
             throw new E('无效的密码。密码长度应该大于 8 并小于 16。', 2);
-        } else if (Utils::convertString($passwd) != $passwd) {
+        } else if (Utils::convertString($password) != $password) {
             throw new E('无效的密码。密码中包含了奇怪的字符。', 2);
         }
         return true;