去掉LoadModule rewrite_module modules/mod_rewrite.so前的“#”符号
     确保中有“AllowOverride All”
2.Yii在项目中的/protected/config/main.php中添加代码：

-----------------------------------------------------------------------------

'components'=>array(

           ...

           'urlManager'=>array(

                 'urlFormat'=>'path',

                 'showScriptName'=>false,//注意false不要用引号括上

           'urlSuffix'=>'.html',

                 'rules'=>array(

                     'sites'=>'site/index',

                 ),

           ),

           ...

       ),

------------------------------------------------------------------------------

3.在与index.php文件同级目录下添加文件“.htaccess”，内容如下：   

----------------------------------------------------------------
Options +FollowSymLinks

   IndexIgnore */*

   RewriteEngine on

   # if a directory or a file exists, use it directly

   RewriteCond %{REQUEST_FILENAME} !-f

   RewriteCond %{REQUEST_FILENAME} !-d

   # otherwise forward it to index.php

   RewriteRule . index.php

----------------------------------------------------------------