Update : instance 方法

src/Autoloader/Psr4.php

@@ -1,6 +1,7 @@
 <?php
 namespace Qii\Autoloader;
 
+use Qii\Exceptions\CallUndefinedClass;
 use Qii\Exceptions\FileNotFound;
 
 /**
@@ -276,7 +277,6 @@ class Psr4
     /**
      * 通过类名加载文件
      * @param string $class 类名
-     * @return string 文件路径
      * @throws FileNotFound
      */
     public function loadFileByClass($class)
@@ -456,6 +456,9 @@ class Psr4
     public function instance()
     {
         $args = func_get_args();
+        if (empty($args)) {
+            throw new InvalidParams("Param is null");
+        }
         $class = array_shift($args);
         $className = $this->getClassName($class);
         //如果实例化的参数发生变化，就重新实例化
@@ -466,7 +469,7 @@ class Psr4
         self::$_loadedClassParams[$className] = $paramsHash;
 
         if (!class_exists($className, false)) {
-            throw new \Qii\Exceptions\CallUndefinedClass(\Qii::i('1105', $className), __LINE__);
+            throw new CallUndefinedClass(\Qii::i('1105', $className), __LINE__);
         }
         $refClass = new \ReflectionClass($className);
         self::$_loadedClass[$className] = $instance = $refClass->newInstanceArgs($args);

src/Config/Setting.php

@@ -35,7 +35,7 @@ class Setting
      * 设置默认语言
      *
      * @return $this
-     * @throws \Exception
+     * @throws
      */
     public function setDefaultLanguage()
     {