update json2php 备注

src/Library/Json2PHP.php

@@ -3,12 +3,13 @@ namespace Qii\Library;
 /**
  * JSON和PHP类互转
  * @author zjh
- * 
+ *
  * 使用方法：
  *
  * $json2PHP = new \Qii\Library\Json2PHP();
- * $class = $json2PHP->jsonMarshaller(new \entity\Express\Application(), $jsonStr);
  * $json2PHP->json2PHP(dirname(__FILE__, 2) . "/entity/Express", 'namespace entity\Express', 'Application', $jsonStr);
+ * $class = $json2PHP->jsonMarshaller(new \entity\Express\Application(), $jsonStr);
+ * print_r($class);
  */
 class Json2PHP {
     public $useType = false;