iis7設置301重定向的方法：
新建一個文件，添加一下代碼，上傳到網站根目錄，代碼如下：
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="301Redirect" stopProcessing="true">
<match url="(.*)" />
<conditions logicalGrouping="MatchAny">
<add input="{HTTP_HOST}" pattern="^xxx.com$" />
</conditions>
<action type="Redirect" url="http://www.xxx.com/{R:0}" redirectType="Permanent" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>
