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默认的控制器为site，修改文件
vendoryiisoftyii2webApplication.php
public $defaultRoute = 'site';//http://localhost:8080/index.php的默认控制器
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修改默认action
对应文件vendoryiisoftyii2aseController.php
public $defaultAction = 'index';//默认index.php
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修改默认布局文件
vendoryiisoftyii2aseApplication.php
public $layout = 'main';//默认main.php
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