1. 你要拥有一个有泛域名解析的顶级域名，例如：test.com 在dns服务上设置，域名服务商都提供此服务 www.test.com      指向服务器IP

test.com          指向服务器IP

a.test.com        指向服务器IP   2. 修改http.conf，或者修改httpd-vhosts.conf，如果后者要检查下 http.conf文件的Include "conf/extra/httpd-vhosts.conf"是否打开了。conf文件增加内容如下：

NameVirtualHost *:80
<VirtualHost *:80>
 ServerAdmin admin@test.com
 DocumentRoot "C:\phpStudy\PHPTutorial\WWW"
 ServerName test.com
 ServerAlias www.test.com
 ErrorLog "C:\phpStudy\PHPTutorial\Apache\logs\test.localhost-error.log"
 CustomLog "C:\phpStudy\PHPTutorial\Apache\logs\test.localhost.access.log" combined
</VirtualHost>

<VirtualHost *:80>
 ServerAdmin admin@test.com
 DocumentRoot "C:\phpStudy\PHPTutorial\WWW\q"
 ServerName a.test.com
 ErrorLog "C:\phpStudy\PHPTutorial\Apache\logs\a.test.localhost-error.log"
 CustomLog "C:\phpStudy\PHPTutorial\Apache\logs\a.test.localhost.access.log" combined
</VirtualHost>

ServerAdmin  管理员邮箱 DocumentRoot 所需指向路径 ServerName   域名名称 ServerAlias  域名别名 可要可不要 ErrorLog     错误日志 CustomLog    访问日志　　 配置好之后，重启apache