（一）hosts文件

没事可以看一下，最近工作需要同时对接两个外部的业务，结果都在和我讲，让我配置host，然而这个东西之前我还就真没怎么用过，用过一次也是不懂一二，当时用的时候也应该是本地的一个ip想绑上一个假的域名，年少的我觉得域名比ip高级、好看哈哈哈

当时是真的小啊，竟会有这种想法，因此催生了当时修改自己笔记本host的冲动，我记得最清楚的是我没改成功最后，总之就是修改了host没有让他生效。

windows中hosts的配置在C:\Windows\System32\drivers\etc

hosts文件的内容

# 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