、打开系统盘，默认是C:\Windows\System32\drivers\etc，如果系统盘是D盘就打开D:\Windows\System32\drivers\etc：
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# localhost name resolution is handled within DNS itself.
127.0.0.1 localhost
127.0.0.1 www.test.com
127.0.0.1 www.fh.com
127.0.0.1 www.test_my.com
首先修改C:\Windows\System32\drivers\etc目录下的 hosts 文件，用记事本打开，加入：
# Copyright (c) 1993-2009 Microsoft Corp.
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# localhost name resolution is handled within DNS itself.
127.0.0.1 localhost
127.0.0.1 www.test.com
127.0.0.1 www.fh.com
127.0.0.1 www.test_my.com
//127.0.0.1 www.a.com127.0.0.1 www.b.com记得去掉前面的
打开xampp\apache\conf\httpd.conf文件，搜索 “Include conf/extra/httpd-vhosts.conf”，确保前面没有 # 注释符，也就是确保引入了 vhosts 虚拟主机配置文件。效果如下：
# Virtual hosts
Include "conf/extra/httpd-vhosts.conf"
开启了httpd-vhosts.conf，默认a的httpd.conf默认配置失效（确保 httpd-vhosts.conf 文件里也开启了虚拟主机配置，见第3条），访问此IP的域名将全部指向 vhosts.conf 中的第一个虚拟主机。
在虚拟主机设置文件xampp\apache\conf\extra \httpd-vhosts.conf里设置：取消 NameVirtualHost *:80 前面的 ##，这样就启用了 vhosts.conf ，默认的httpd.conf默认配置失效。虚拟主机配置将只设置在httpd-vhosts.conf里。localhost 的目录默认配置记得也按此设置。
<VirtualHost *:80>
ServerAdmin fh@fh.com
DocumentRoot "D:/feihu/xampp/htdocs/mylaravel/public"
ServerName www.fh.com
ErrorLog "logs/fh.com-error.log"
CustomLog "logs/fh.com-access.log" common
</VirtualHost>
#
# Use name-based virtual hosting.
#
NameVirtualHost *:80
#
# VirtualHost example:
# Almost any Apache directive may go into a VirtualHost container.
# The first VirtualHost section is used for all requests that do not
# match a ServerName or ServerAlias in any block.
#
ServerAdmin postmaster@dummy-host.localhost
DocumentRoot "I:/xampp/htdocs/"
ServerName localhost
ServerAlias localhost
ErrorLog "logs/dummy-host.localhost-error.log"
CustomLog "logs/dummy-host.localhost-access.log" combined
ServerAdmin postmaster@dummy-host1.localhost
DocumentRoot "I:/xampp/htdocs/a"
ServerName www.a.com
ServerAlias www.a.com
ErrorLog "logs/dummy-host1.localhost-error.log"
CustomLog "logs/dummy-host1.localhost-access.log" combined
ServerAdmin postmaster@dummy-host2.localhost
DocumentRoot "I:/xampp/htdocs/b/"
ServerName www.b.com
ServerAlias www.b.com
ErrorLog "logs/dummy-host2.localhost-error.log"
CustomLog "logs/dummy-host2.localhost-access.log" combined
//至此，XAMPP 的虚拟主机设置完毕，现在 访问 localhost 还是原来的 XAMPP 的帮助指南，访问 www.a.com 将指向到绑定的 a 目录，访问 www.b.com 将指向到绑定的 b 目录。